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For `reviewReason: \"dial:destination_auto_blocked\"` first lift the block (`POST /v1/dnc/{e164}/unblock`) and only then `retry`; for `dial:cannot_call_own_number`, `dial:cannot_call_volai_number`, `dial:invalid_number`, `dial:unsupported_country` and `dial:blocked_destination` only `skip` helps. `reviewReason: \"billing_unknown\"` is different: the `providerCallId` and reserved budget remain attached until `POST .../reconcile`; after `retry`, the replacement attempt waits for the original call to settle, and after `skip` no replacement call is made but the original call may still be charged later (its reservation keeps counting against the budget). After `retry` the task therefore stays in `needs_attention` until the price settles; after `skip` it moves to `paused` and can be started when work remains, otherwise it waits in `needs_attention` and completes once the price settles. A call that was never dialed settles at 0 right away. 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It is `null` when the plan is not offered to the account or the credit history does not reach 30 days back (a new account). `previousPeriod` summarizes the paid period before the current one (`subscription.periodStart`), with the same figures as the renewal e-mail: the `tier`, `periodStart` and `periodEnd` (ISO 8601), its monthly credit `creditHal`, how much of it was used `usedHal` and `usedPercent` (rounded down), spending beyond the monthly credit `overHal` (with top-ups without debt that the next credit paid off, with the cap including debt; `null` when the credit history cannot prove it), what expired `expiredHal`, `exhaustionMode` and `exhaustedAt`, when the monthly credit ran out (`null` when it did not, or when the credit history cannot show when). It is returned only while the plan is active, whatever `available` says; it is `null` without a plan, with status `past_due` or `canceled`, in the first period, when the credit history could not prove the usage, and 45 days after the renewal that saved it.","responses":{"200":{"description":"Monthly plan state","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. 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A plan that has ended is still returned, with status canceled."},"tiers":{"type":"array","items":{"type":"object","properties":{"id":{"type":"string","enum":["490","990","1990"],"description":"Tier id: the monthly price in CZK excluding VAT, written as a string."},"priceHal":{"type":"number","description":"Price per month in hellers (hundredths of a koruna), excluding VAT."},"creditHal":{"type":"number","description":"Monthly credit the tier adds, in hellers. It is spent before topped-up credit and expires at the end of the period."}},"required":["id","priceHal","creditHal"]},"description":"The tiers on offer, cheapest first, with price and monthly credit."},"topupBalanceHal":{"type":"number","description":"The topped-up credit in hellers (same as topupBalanceHal in GET /v1/balance). Negative when the account owes."},"available":{"type":"boolean","description":"Whether this account can start a NEW plan right now. An existing plan is always returned and keeps working when this is false."},"recommendation":{"anyOf":[{"type":"object","properties":{"spendHal":{"type":"number","description":"What the account spent in the last 30 days on calls, the agent, SMS and number fees, in hellers excluding VAT. Actual spend, not extrapolated; one-off charges are left out."},"days":{"type":"number","description":"Length of the spend window in days."},"cheapestPath":{"type":"string","enum":["per_second","plan"],"description":"The cheaper way to pay for that spend: per_second (prepaid credit, no plan) or plan (the tier below, topping up from the saved card once its monthly credit runs out). A tie goes to per_second."},"tier":{"type":"string","enum":["490","990","1990"],"description":"The tier that would have cost least for that spend, with top-ups. Compare it with subscription.tier on an account that already has a plan."},"tierTotalHal":{"type":"number","description":"What that tier would have cost for that spend: its price plus top-ups, in hellers excluding VAT."},"savingsHal":{"type":"number","description":"How much less the plan would have cost than paying per second, in hellers excluding VAT; 0 when per_second is cheaper."},"worthIt":{"type":"boolean","description":"Whether the saving is big enough for volai to suggest the plan: at least 50 CZK and 5% of the spend. The portal offers the plan only when this and steady are both true."},"steady":{"type":"boolean","description":"Whether the spend is ongoing rather than a one-off peak: usage over the last 14 Prague days scaled to 30 days, plus the monthly number fees of the 30-day window counted once, reaches at least the price of the recommended tier. The portal and the MCP sentence offer the plan only when worthIt and steady are both true."},"options":{"type":"array","items":{"type":"object","properties":{"path":{"type":"string","enum":["per_second","plan"]},"tier":{"anyOf":[{"type":"string","enum":["490","990","1990"]},{"type":"null"}],"description":"The tier for path plan; null for per_second."},"totalHal":{"type":"number","description":"What that path would have cost for the same spend, in hellers excluding VAT (a plan with top-ups from the saved card)."}},"required":["path","tier","totalHal"]},"description":"Every way to pay for the same spend: paying per second and each tier with top-ups. The same figures the portal shows when changing the plan level. For an account that already has a plan, compare them with what the current plan costs."}},"required":["spendHal","days","cheapestPath","tier","tierTotalHal","savingsHal","worthIt","steady","options"]},{"type":"null"}],"description":"The cheapest way to pay for what the account actually spent in the last 30 days (same calculation as the calculator on volai.cz). null when the plan is not offered to the account (available is false) or the credit history does not reach 30 days back."},"previousPeriod":{"anyOf":[{"type":"object","properties":{"tier":{"type":"string","enum":["490","990","1990"],"description":"Tier that was paid for that period."},"periodStart":{"type":"string","description":"Start of that period as an ISO 8601 string in UTC."},"periodEnd":{"type":"string","description":"End of that period as an ISO 8601 string in UTC."},"creditHal":{"type":"number","description":"Monthly credit of that period, in hellers excluding VAT."},"usedHal":{"type":"number","description":"How much of that monthly credit was used, in hellers (0 up to creditHal)."},"usedPercent":{"type":"number","description":"usedHal as a share of creditHal, in percent rounded down (the figure the renewal e-mail shows)."},"overHal":{"anyOf":[{"type":"number"},{"type":"null"}],"description":"Spending in that period beyond its monthly credit, in hellers excluding VAT. With exhaustionMode topup it is what topped-up credit paid (debt that the next monthly credit paid off at the renewal is left out); with cap it also includes any debt the account ran up. null when the credit history no longer reaches back to that period."},"expiredHal":{"type":"number","description":"Unused monthly credit that expired with that period, in hellers."},"exhaustionMode":{"type":"string","enum":["topup","cap"],"description":"What happened in that period once its monthly credit was used up (see subscription.exhaustionMode)."},"exhaustedAt":{"anyOf":[{"type":"string"},{"type":"null"}],"description":"When the monthly credit of that period ran out (its last charge), as an ISO 8601 string in UTC; null when some was left or when the credit history cannot show when it ran out."}},"required":["tier","periodStart","periodEnd","creditHal","usedHal","usedPercent","overHal","expiredHal","exhaustionMode","exhaustedAt"]},{"type":"null"}],"description":"Summary of the paid period before the current one (subscription.periodStart), with the same figures as the renewal e-mail and the plan card in the portal. Returned only while the plan is active, whatever available says: null without a plan, with status past_due or canceled, in the first period, when the credit history could not prove the usage, and 45 days after the renewal that saved it."}},"required":["subscription","tiers","topupBalanceHal","available","recommendation","previousPeriod"]}}}},"401":{"description":"Error codes: unauthorized (request).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. 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Raising `tier`, `cancelAtPeriodEnd: false` on a plan that is set to end (resuming it) and `exhaustionMode: \"topup\"` do NOT apply: the call returns 409 `subscription_confirmation_required` and nothing in the request changes. The error body carries `confirmUrl`, a link to the portal page where a person signed in to the account confirms the change; the link is valid for 24 hours and works once. Send changes that need confirmation one per request. A request that changes nothing (resuming a plan that is not set to end, `topup` while top-ups already run) succeeds without a confirmation.","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"tier":{"type":"string","enum":["490","990","1990"],"description":"Tier to switch to from the next period (nextTier shows it); the current period and its credit stay as they are. 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The response has `callId`, `outcome` and `endConfirmed`: `hung_up` means the native engine acknowledged the exact call, `already_ended` requires a terminal stored call plus absence on all nodes, and `unknown` never means success. After an unknown result, inspect live activity and stored call state; repeating this endpoint only reads back and never sends another hangup. Recheck active calls after termination. Inbound calls, other tenants, standalone calls and other providers are rejected. 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Both the list and the detail also carry `answeredBy` (OUTBOUND calls only: `human`, `voicemail`, `ivr` (an automated voice menu answered; the engine hangs up right away), or `unknown` when the engine reached no decision or the transcript is missing; inbound calls omit the field, because a brief caller reply is not a voicemail). The engine decides with `human`, `voicemail`, and `ivr`; `unknown` means the engine reached no decision before its detection window closed, and since 1.33.0 it stays `unknown` (earlier the transcript-based estimate replaced it, and that estimate treated a short reply such as \"Yes.\" after the intro as a voicemail). The transcript-based estimate (`human` or `voicemail`, `unknown` for an empty transcript; it never detects a voice menu) applies only to calls without an engine value. An outbound call handled by volai's own voice engine also carries `voicemailReason` (`phrase`, `long_monologue`, `beep`, `human_reply`, `ivr_phrase`, or `digits` - `human_reply` means a person picked up with a reply so short the detector noted it (not that it was a voicemail), `ivr_phrase` is a voice menu phrase, `digits` a carrier greeting reading the called number digit by digit), `voicemailMessageLeft` (the engine read the configured message into the voicemail), and `voicemailDetectedAtSecs` (seconds from pickup until the engine's detector reached a decision - even on a call a person answered) - all three fields come only from the engine; ElevenLabs's transcript-based classification (`answeredBy` without an explicit value) doesn't know the reason or the timing. An inbound or outbound call on the engine also carries `optOutRequested: true` when the remote participant explicitly asked not to be called again (for example \"do not call me\", even in the last seconds after the farewell) - the number is then on the account's do-not-call list automatically (`GET /v1/dnc`) and the task retry policy schedules no further attempt; a call without such a reply has no such key. It also carries `endReason` (`completed`, `no_answer`, `busy`, `rejected`, `capacity`, `blocked`, `loop_guard`, `credit_blocked`, `suspended`, `engine_error`, `caller_loop`, `failed`), and `kind` (`agent`, `bridge`, `relay`, `inbound`, `transfer`, `sip`, `ring`) - see the table below. A ring (`kind: \"ring\"`) also carries a `ring` block (`requestedSecs`, `outcome`, `rangSecs`) - see `POST /v1/rings`. The tools-and-recordings wave added two more fields: `data` (what the agent captured from the call per its `dataFields`; a `null` value means it wasn't mentioned) and `hasRecording` (the call has a recording available for download, see the endpoint below). Older calls don't have these fields and they're missing from the response. `durationSecs` is in seconds; for calls handled by volai's own engine it can be a decimal number (rounded to two decimal places). The response carries the account owner's own annotations, always present, `null` when unset: `note` (string), `flag` (`{reason, flaggedAt} | null`), `handledAt` (Unix ms or `null`) and `goal` (`{result: \"success\"|\"failure\"|\"unknown\", rationale, reason} | null`, filled in only once the agent's goal was evaluated; `reason` is `\"no_caller_speech\"|\"evaluation_error\"|null` and says why the result came out \"unknown\" - `null` for a genuinely unclear result) - see `PATCH /v1/calls/{id}` below. The response also always carries `hasConversation` (`boolean | null`) - whether the call actually had a conversation with the caller; `false` for a call that didn't connect, voicemail, or a voice menu, `null` for an older record without enough signal to decide. A call for an agent with phases (workflow nodes plan) handled by volai's own voice engine (`provider: \"engine\"`) also carries `workflowPath` - see the Call phases (workflow) section under agents above; a call on an agent hosted on ElevenLabs never carries the field, even when it went through phases, because only the engine's post-call writes it. A call handled by an engine build from 15 Oct 2026 on also carries, in the detail (not in the list), an `engine` block with `protectedUtterances` and `protectedUtterancesCount`: utterances of the person who answered that the engine dropped during the greeting window - what they said while the agent spoke its first line (\"Hello?\", their name, or anything inside `firstMessageProtectSecs`) and the engine deliberately did not take, so it is NOT in the transcript and the agent did not react to it; an agent-only transcript with a non-empty list therefore means the person did answer and speak. Each item has `timeInCallSecs` (start of the speech in the recording, absent when the engine does not know it), `atSecs` (when the engine finished hearing it, seconds from the start of the call, always), `message` (up to 200 characters), `words` and `reason` (`first_message_protect`, `greeting_courtesy` or `greeting_identification`; open list). 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A gate that opens when it sees the call usually ends as `rang` or `ended_early`; `answered` is the exception."},"rangSecs":{"description":"How long the target rang, in seconds. First volai's own measurement, replaced by the carrier's figure once its call record has been processed. The carrier counts the ringing from the moment the order is placed, so its figure is usually 1 to 3 seconds longer than the requested `ringSecs`.","type":"number"}},"required":["requestedSecs"]},"answeredBy":{"description":"Outbound calls only: `human`, `voicemail`, `ivr` (an automated voice menu answered; the engine hangs up), or `unknown` when the engine reached no decision or the transcript is missing. 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Used only by the engine."},"turnLongSpeechSecs":{"anyOf":[{"type":"number"},{"type":"null"}],"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30. null means not set, so the engine default (5) applies. Has no effect while turnLongSpeechFloorMs is off."},"inboundVariables":{"description":"Default values for {{variable}} placeholders on inbound calls, merged into the call's dynamic variables only for names the inbound call does not supply itself (caller_number, called_number, attempt_id, volai_*, trial_*, system__*). Absent when the agent has none. Not used on outbound calls. Works for either provider.","type":"object","propertyNames":{"type":"string"},"additionalProperties":{"type":"string"}},"workflow":{"description":"Call split into phases (nodes). Absent means the agent runs as a single phase, as before. See the \"Call phases (workflow)\" section for the full shape, limits and an example.","type":"object","properties":{"version":{"type":"number","const":1,"description":"Workflow format version, currently always 1."},"entry":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node the call starts in. Must exist among nodes."},"nodes":{"maxItems":16,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Machine id of this node: lowercase letters, digits and underscores, starting with a letter, up to 32 characters. Must be unique within the workflow. The words start, start_node, end and end_node are reserved."},"label":{"type":"string","minLength":1,"maxLength":60,"description":"Human-readable phase name, 1 to 60 characters."},"prompt":{"description":"Prompt addition that only applies while the call is in this node, up to 2000 characters. The agent's base systemPrompt should only hold what is true in every phase.","type":"string","maxLength":2000},"knowledge":{"description":"Extra knowledge that only applies in this node, up to 4000 characters. prompt and knowledge combined must not exceed 4000 characters for one node.","type":"string","maxLength":4000},"toolIds":{"description":"Ids of account tools (from list_tools) visible only while the call is in this node, at most 10. A tool not assigned to any node stays visible in every node.","maxItems":10,"type":"array","items":{"type":"string","minLength":1,"maxLength":100}},"enterPhrase":{"description":"Sentence spoken immediately on entering this node, at most once per call, up to 160 characters.","type":"string","maxLength":160},"enterBehavior":{"description":"Defaults to \"reply\". \"wait\" means the model does not answer in the same turn after speaking enterPhrase and waits for the caller instead; requires enterPhrase.","type":"string","enum":["reply","wait"]}},"required":["id","label"]},"description":"Call phases, 2 to 8 nodes."},"edges":{"maxItems":48,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,47}$","description":"Machine id of this edge: lowercase letters, digits and underscores, starting with a letter, up to 48 characters. Must be unique within the workflow."},"from":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge leaves."},"to":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge enters. Must differ from from."},"condition":{"type":"string","minLength":1,"maxLength":2000,"description":"When to take this edge, written about what the CALLER said (never about what the agent or a tool did), 5 to 200 characters. Goes verbatim into the description of the switch_to_{to} tool."}},"required":["id","from","to","condition"]},"description":"Transitions between phases, 1 to 24 edges, at most 5 leaving any one node."}},"required":["version","entry","nodes","edges"]},"calendar":{"description":"Calendar availability rules for check_availability/book_appointment on volai's own voice engine. Absent means the agent does not book appointments. Effective only once provider is engine - see calendar_pending_engine_switch in warnings.","type":"object","properties":{"integrationId":{"type":"string","description":"Id of the connected calendar integration this agent books through, from list_integrations."},"calendarId":{"type":"string","description":"Id of the specific calendar within that connection, from list_calendars. The agent writes appointments into this calendar, so it must be writable (accessRole owner or writer); a read-only calendar is rejected with calendar_invalid_calendar."},"busyCalendarIds":{"description":"Other calendars in the same connection whose events also block a slot; nothing is written into them, so read-only calendars are fine. At most 4, without duplicates and without calendarId.","type":"array","items":{"type":"string"}},"timezone":{"type":"string","description":"IANA timezone the windows and spoken times are interpreted in, for example Europe/Prague."},"slotMinutes":{"anyOf":[{"type":"number","const":15},{"type":"number","const":30},{"type":"number","const":45},{"type":"number","const":60},{"type":"number","const":90},{"type":"number","const":120}],"description":"Length of each offered appointment slot in minutes."},"minNoticeMinutes":{"type":"number","description":"Minimum notice before the earliest offered slot, in minutes."},"horizonDays":{"type":"number","description":"How many days ahead the agent searches for a free slot."},"bufferMinutes":{"type":"number","description":"Buffer kept free immediately before and after every busy event, in minutes."},"windows":{"type":"object","properties":{"mon":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Monday. An empty array means no availability that day."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Tuesday. An empty array means no availability that day."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Wednesday. An empty array means no availability that day."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Thursday. An empty array means no availability that day."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Friday. An empty array means no availability that day."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Saturday. An empty array means no availability that day."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Sunday. An empty array means no availability that day."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows for every weekday. At least one weekday needs a non-empty window."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"]},"missedCallSms":{"type":"object","properties":{"enabled":{"type":"boolean"},"text":{"type":"string"}},"required":["enabled"],"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). enabled: false when off. text is a custom template (up to 320 characters); absent uses the default text in the agent's language."},"suspended":{"type":"boolean","description":"Whether the volai operator has manually suspended this agent. A suspended agent can't receive or make calls or send missed-call SMS; its settings stay editable. A suspension of the whole account is reported as the `account_suspended` error on every request instead."}},"required":["id","name","language","systemPrompt","provider","createdAt","status","goal","knowledge","notifyEmail","silencePromptSecs","laughter","firstMessageProtectSecs","silencePromptText","sttLanguageHintsStrict","turnDigitTailFloorMs","turnLongSpeechFloorMs","turnLongSpeechSecs","missedCallSms","suspended"]}}},"required":["agents"]}}}},"401":{"description":"Error codes: unauthorized (request).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"WWW-Authenticate":{"description":"Bearer authentication challenge for an invalid or missing API key.","schema":{"type":"string","example":"Bearer realm=\"volai\", error=\"invalid_token\""}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"403":{"description":"Error codes: account_suspended (account).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"429":{"description":"Error codes: rate_limited (busy).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}},"Retry-After":{"description":"Seconds until the request may be retried. Sent for the API key limit and for the outbound call limit when the wait is known. Other 429 responses, for example the daily SMS cap or a number purchase that is still running, do not carry it: follow the error message instead.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"500":{"description":"Error codes: internal_error (service).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}}}},"post":{"operationId":"post_agents","summary":"Create an agent","description":"Creates a new voice agent. Only `name` and `systemPrompt` are required - how to write a good prompt is covered on the [Voice agent](https://volai.cz/en/docs/agent) page. If you send `numberE164`, the agent is attached to that number right away. `POST` returns only the `id`; use a follow-up `GET /v1/agents/{id}` to read the actual `provider`. `transferTo` triggers a post-save attempt to move an ElevenLabs agent to the engine, but a paused attempt, unavailable engine or failure can leave it on ElevenLabs, where handoff does not work. `voiceId` picks the voice: explicit `useForOutboundTasks: true` replaces a recognized catalog voice unavailable on the engine, including `katty`, with the engine default. Outside this fallback, the engine accepts catalog voices except the ElevenLabs voices (`katty`, the older `anet`); a raw ElevenLabs ID or another incompatible voice returns 400. With `false`, the initial voice must be valid for ElevenLabs (`katty` or a raw ElevenLabs ID; ElevenLabs no longer assigns `anet` to new agents and volai rejects it with a 400); a successful later switch for `transferTo` may map it to the engine default. Without `voiceId`, the engine uses Milena and ElevenLabs uses the template's voice (Katty). The optional fields (`toolIds`, `transferTo`, `transferCondition`, `dataFields`, `recordCalls`, `goal`, `knowledge`, `notifyEmail`, `useForOutboundTasks`, `voicemail`) are described below.","parameters":[{"name":"Idempotency-Key","in":"header","required":false,"description":"Optional key for one logical request. Its scope is global to this API key, independent of the HTTP method, path, or body: use a new value for every distinct logical action across all endpoints and request bodies, and reuse it only to retry the exact same logical request. Reusing a non-blank key within 24 hours returns the stored response; a concurrent request with the same key returns 409 idempotency_in_progress. A missing or whitespace-only value disables idempotency.","schema":{"type":"string"}}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"name":{"type":"string","maxLength":60,"description":"Display name of the agent. Leading and trailing whitespace is trimmed.","minLength":1},"systemPrompt":{"type":"string","maxLength":6000,"description":"Instructions governing every call. Describe the role, facts the agent may use and when to hand off; do not include secrets. Whitespace is trimmed.","minLength":10},"firstMessage":{"type":"string","maxLength":2000,"description":"Opening line spoken to the caller. Omit at creation to use the default greeting. Include a short AI disclosure; recording adds a notice automatically. A long greeting saves with a warning."},"language":{"type":"string","maxLength":10,"description":"Language spoken by the agent: Czech, Slovak, English, German or Polish. Defaults to cs at creation, where it does not by itself select a voice provider. On PATCH, a change from en, de or pl to cs or sk moves an ElevenLabs agent to the volai engine with that language's default voice; read provider in the response.","enum":["cs","sk","en","de","pl"]},"voiceId":{"type":"string","maxLength":200,"description":"Voice id from GET /v1/voices, compatible with the agent's provider. Omit when the provider is uncertain, read back the agent, then choose its voice. An empty string restores the provider's default voice."},"numberE164":{"type":"string","maxLength":32,"description":"Owned phone number to attach, in E.164 format. Omit at creation for an agent without a number. On PATCH, null detaches the number; omission leaves it unchanged."},"toolIds":{"maxItems":10,"type":"array","items":{"type":"string","maxLength":64},"description":"Complete list of owned webhook tool ids from GET /v1/tools. Replaces the previous list on PATCH; [] removes all tools."},"transferTo":{"type":"string","maxLength":32,"description":"Human handoff destination in E.164 format. Must not point back to your own volai number. An empty string disables handoff. Setting a destination attempts an engine switch; read back provider to verify it succeeded."},"transferCondition":{"type":"string","maxLength":500,"description":"When the agent should transfer to the human destination. An empty string restores the default condition."},"dataFields":{"maxItems":10,"type":"array","items":{"type":"object","properties":{"key":{"type":"string","maxLength":40,"description":"Unique key in the call's data object: lowercase letter first, then lowercase letters, digits or underscores.","pattern":"^[a-z][a-z0-9_]{0,39}$"},"type":{"type":"string","enum":["string","number","boolean"],"description":"JSON value type to extract. enumValues applies only to string fields."},"description":{"type":"string","maxLength":500,"description":"Explain what the agent should capture and how to recognize it in the caller's words.","minLength":5},"enumValues":{"maxItems":20,"type":"array","items":{"type":"string","maxLength":60,"minLength":1},"description":"Allowed values for a string field. Omit or send [] for unrestricted text."}},"required":["key","type","description"]},"description":"Complete list of structured facts to extract from a call. Replaces the previous list on PATCH; [] disables extraction."},"recordCalls":{"type":"boolean","description":"Whether to record calls. Defaults to true at creation and adds a short recording notice to the greeting. You remain responsible for appropriate disclosure."},"goal":{"type":"string","maxLength":300,"description":"One sentence defining a successful call for post-call evaluation on engine agents. An empty string clears it; PATCH also accepts null."},"knowledge":{"type":"string","maxLength":20000,"description":"Additional reference text for the agent, separate from its instructions. An empty string clears it; PATCH also accepts null."},"notifyEmail":{"type":"boolean","description":"Whether to email the account owner a summary after each engine call. Defaults to true at creation."},"useForOutboundTasks":{"type":"boolean","description":"Creation only: true requests the volai engine, false starts on ElevenLabs, and omission uses the deployment default, subject to engine availability, enablement and configured languages. cs or sk alone does not guarantee the engine. An explicit false that overrides the language's engine default returns the elevenlabs_by_explicit_choice warning. transferTo may subsequently attempt an engine switch. REST creation returns only id; read GET /v1/agents/{id} to verify provider and voiceId."},"voicemail":{"type":"object","properties":{"enabled":{"type":"boolean","description":"Enable detection of a voicemail greeting during outbound calls."},"action":{"type":"string","enum":["mark","hangup","message"],"description":"mark records the detection and continues, hangup ends the call, message speaks the configured message and ends the call. message requires a nonblank message even when enabled is false."},"message":{"type":"string","maxLength":400,"description":"Text spoken into voicemail when action is message. Required and nonblank for that action; any supplied message must fit the length limit."}},"required":["enabled","action"],"description":"Outbound voicemail detection for engine agents. Creation requires the initial provider selection to be engine, before any transfer-triggered switch. On PATCH, null clears this configuration.","allOf":[{"if":{"type":"object","properties":{"action":{"const":"message"}},"required":["action"]},"then":{"required":["message"],"properties":{"message":{"type":"string","pattern":"\\S"}}}}]},"silencePromptSecs":{"anyOf":[{"type":"integer","minimum":3,"maximum":25,"description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH."},{"type":"integer","description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH.","minimum":3,"maximum":25}],"description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH.","type":"integer","minimum":3,"maximum":25},"firstMessageProtectSecs":{"description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH.","anyOf":[{"type":"number","minimum":0,"maximum":20,"description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH."},{"type":"null","description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH.","minimum":0,"maximum":20}],"minimum":0,"maximum":20},"silencePromptText":{"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH.","anyOf":[{"type":"string","maxLength":80,"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH."},{"type":"null","description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH.","maxLength":80}],"maxLength":80},"sttLanguageHintsStrict":{"description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off).","anyOf":[{"type":"boolean","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off)."},{"type":"null","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off)."}]},"turnDigitTailFloorMs":{"description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"integer","minimum":0,"maximum":2300,"description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":0,"maximum":2300}],"minimum":0,"maximum":2300},"turnLongSpeechFloorMs":{"description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"integer","minimum":0,"maximum":2300,"description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":0,"maximum":2300}],"minimum":0,"maximum":2300},"turnLongSpeechSecs":{"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"number","minimum":1,"maximum":30,"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":1,"maximum":30}],"minimum":1,"maximum":30},"inboundVariables":{"description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","anyOf":[{"type":"object","propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"},"additionalProperties":{"type":"string","maxLength":200},"description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","maxProperties":10},{"type":"null","description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","maxProperties":10,"propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"}}],"maxProperties":10,"propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"}},"laughter":{"description":"Whether the agent may laugh during a call: auto follows sensitive-topic detection, on overrides that detection, off always suppresses it. on does not override everything else: the engine still needs a Cartesia voice in Czech and its own switch on. Has no effect on agents hosted on ElevenLabs. Omission stores auto explicitly at creation, or leaves the current setting unchanged on PATCH.","type":"string","enum":["auto","on","off"]},"workflow":{"type":"object","properties":{"version":{"type":"number","const":1,"description":"Workflow format version, currently always 1."},"entry":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node the call starts in. Must exist among nodes."},"nodes":{"maxItems":8,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Machine id of this node: lowercase letters, digits and underscores, starting with a letter, up to 32 characters. Must be unique within the workflow. The words start, start_node, end and end_node are reserved."},"label":{"type":"string","minLength":1,"maxLength":60,"description":"Human-readable phase name, 1 to 60 characters."},"prompt":{"description":"Prompt addition that only applies while the call is in this node, up to 2000 characters. The agent's base systemPrompt should only hold what is true in every phase.","type":"string","maxLength":2000},"knowledge":{"description":"Extra knowledge that only applies in this node, up to 4000 characters. prompt and knowledge combined must not exceed 4000 characters for one node.","type":"string","maxLength":4000},"toolIds":{"description":"Ids of account tools (from list_tools) visible only while the call is in this node, at most 10. A tool not assigned to any node stays visible in every node.","maxItems":10,"type":"array","items":{"type":"string","minLength":1,"maxLength":100}},"enterPhrase":{"description":"Sentence spoken immediately on entering this node, at most once per call, up to 160 characters.","type":"string","maxLength":160},"enterBehavior":{"description":"Defaults to \"reply\". \"wait\" means the model does not answer in the same turn after speaking enterPhrase and waits for the caller instead; requires enterPhrase.","type":"string","enum":["reply","wait"]}},"required":["id","label"],"additionalProperties":false},"description":"Call phases, 2 to 8 nodes.","minItems":2},"edges":{"maxItems":24,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,47}$","description":"Machine id of this edge: lowercase letters, digits and underscores, starting with a letter, up to 48 characters. Must be unique within the workflow."},"from":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge leaves."},"to":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge enters. Must differ from from."},"condition":{"type":"string","minLength":1,"maxLength":2000,"description":"When to take this edge, written about what the CALLER said (never about what the agent or a tool did), 5 to 200 characters. Goes verbatim into the description of the switch_to_{to} tool."}},"required":["id","from","to","condition"],"additionalProperties":false},"description":"Transitions between phases, 1 to 24 edges, at most 5 leaving any one node.","minItems":1}},"required":["version","entry","nodes","edges"],"additionalProperties":false,"description":"Call phases that add local instructions, knowledge and tools. Omit at creation for one shared scope; PATCH null removes phases. Publish requires a reachable graph, at most 5 outgoing edges per node, and prompt plus knowledge at most 4000 characters per node."},"calendar":{"type":"object","properties":{"integrationId":{"type":"string","description":"Id of the connected calendar integration this agent books through, from list_integrations."},"calendarId":{"type":"string","description":"Id of the specific calendar within that connection, from list_calendars. The agent writes appointments into this calendar, so it must be writable (accessRole owner or writer); a read-only calendar is rejected with calendar_invalid_calendar."},"busyCalendarIds":{"description":"Other calendars in the same connection whose events also block a slot; nothing is written into them, so read-only calendars are fine. At most 4, without duplicates and without calendarId.","type":"array","items":{"type":"string"}},"timezone":{"type":"string","description":"IANA timezone the windows and spoken times are interpreted in, for example Europe/Prague."},"slotMinutes":{"anyOf":[{"type":"number","const":15},{"type":"number","const":30},{"type":"number","const":45},{"type":"number","const":60},{"type":"number","const":90},{"type":"number","const":120}],"description":"Length of each offered appointment slot in minutes."},"minNoticeMinutes":{"type":"number","description":"Minimum notice before the earliest offered slot, in minutes."},"horizonDays":{"type":"number","description":"How many days ahead the agent searches for a free slot."},"bufferMinutes":{"type":"number","description":"Buffer kept free immediately before and after every busy event, in minutes."},"windows":{"type":"object","properties":{"mon":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Monday. An empty array means no availability that day."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Tuesday. An empty array means no availability that day."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Wednesday. An empty array means no availability that day."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Thursday. An empty array means no availability that day."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Friday. An empty array means no availability that day."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Saturday. An empty array means no availability that day."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Sunday. An empty array means no availability that day."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows for every weekday. At least one weekday needs a non-empty window."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"],"description":"Calendar availability rules so the agent can check availability and book appointments during a call, effective only once the agent's provider is engine - see calendar_pending_engine_switch in warnings otherwise. Creation only sets it. On PATCH, null clears it; omission leaves it unchanged."},"missedCallSms":{"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). Omission leaves SMS off at creation, or unchanged on PATCH; send { enabled: false } to turn it off.","type":"object","properties":{"enabled":{"type":"boolean","description":"Whether the missed-call SMS is on."},"text":{"type":"string","maxLength":320,"description":"Custom SMS template using {firma}/{cislo}/{agent}; any other {...} variable is rejected. Omit for the default text in the agent's language."}},"required":["enabled"],"additionalProperties":false}},"required":["name","systemPrompt"]}}}},"responses":{"200":{"description":"Created agent id","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"id":{"type":"string"},"warnings":{"type":"array","items":{"anyOf":[{"type":"object","properties":{"code":{"type":"string","enum":["first_message_no_ai_disclosure","first_message_too_long","dead_end","short_condition","entry_phrase_never_spoken","empty_node","base_prompt_long","missing_enter_phrase","condition_about_agent","workflow_not_synced_to_provider","workflow_node_tool_not_synced","workflow_node_tool_missing","calendar_pending_engine_switch","prompt_variables_unavailable_inbound","first_message_empty","agent_misuse_suspected"]},"message":{"type":"object","properties":{"cs":{"type":"string"},"en":{"type":"string"}},"required":["cs","en"]},"nodeId":{"description":"Id of the workflow node this warning is about, when it belongs to one specific node rather than the agent as a whole.","type":"string"},"edgeId":{"description":"Id of the workflow edge this warning is about, when it belongs to one specific edge rather than the agent as a whole.","type":"string"}},"required":["code","message"]},{"type":"object","properties":{"code":{"type":"string","const":"elevenlabs_by_explicit_choice"},"message":{"type":"object","properties":{"cs":{"type":"string"},"en":{"type":"string"}},"required":["cs","en"]}},"required":["code","message"]}]}}},"required":["id"]}}}},"400":{"description":"Error codes: invalid_name (request), invalid_system_prompt (request), invalid_language (request), agent_limit (account), tool_limit (account), invalid_data_fields (request), invalid_goal (request), invalid_knowledge (request), transfer_loop (request), blocked_destination (request), invalid_number (request), invalid_voicemail_message (request), voicemail_requires_engine (request), invalid_workflow (request), calendar_invalid_calendar (request), calendar_invalid_timezone (request), calendar_invalid_windows (request), calendar_no_windows (request), calendar_invalid_rules (request), validation (request).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"401":{"description":"Error codes: unauthorized (request).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"WWW-Authenticate":{"description":"Bearer authentication challenge for an invalid or missing API key.","schema":{"type":"string","example":"Bearer realm=\"volai\", error=\"invalid_token\""}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"403":{"description":"Error codes: account_suspended (account).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. 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Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"409":{"description":"Error codes: idempotency_in_progress (busy).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. 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Other 429 responses, for example the daily SMS cap or a number purchase that is still running, do not carry it: follow the error message instead.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. 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If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. Valid for 24 hours and usable once.","type":"string"},"requestId":{"type":"string"},"docsUrl":{"type":"string"}},"required":["code","cause","message","action","requestId","docsUrl"]}},"required":["error"]}}}},"503":{"description":"Error codes: engine_not_configured (service), engine_setup_incomplete (service).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. 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Changing `language` with `PATCH` from a language in which new agents start on ElevenLabs (today `en`, `de`, `pl`) to one in which they start on the engine (`cs`, `sk`) triggers the same attempt: on success the agent gets the new language's default engine voice (Milena, Katarina), on failure it stays on ElevenLabs. A change between `cs` and `sk` moves nothing. Other provider moves are handled by support. ElevenLabs accepts only `anet` from the catalog or a raw ElevenLabs voice id; other catalog voices require the engine. The response also always carries a `laughterEffective` field (`{active, reason, sensitiveCategory} | null`) - the live laughter-policy outcome for the agent's PUBLISHED configuration, computed fresh outside of any call. For an ElevenLabs agent it's always `{active: false, reason: \"not_engine\", sensitiveCategory: null}` without calling the engine; for an engine agent `reason` is one of several values (`ok`, `agent_off`, `sensitive_prompt`, `voice_not_listed` and more) and the engine may add new ones over time - treat an unknown value as off, not as an error. When the engine doesn't answer within 3 seconds, is down, or doesn't know the agent (a silent 404 on an older build), `laughterEffective` is `null` outright - never a guess.","parameters":[{"name":"id","in":"path","required":true,"schema":{"type":"string"}}],"responses":{"200":{"description":"Agent","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. 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A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null means not set, so the engine plays the first line as before."},"silencePromptText":{"anyOf":[{"type":"string"},{"type":"null"}],"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language. null means the default text is used. Heard only once the agent runs on the volai engine."},"sttLanguageHintsStrict":{"type":"boolean","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply is not written as a foreign word or in another script. Best effort; meant for cs agents with outbound calls, never for sk. false when not set. Read only by the engine, ElevenLabs ignores it."},"turnDigitTailFloorMs":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}],"description":"Silence floor in milliseconds the volai engine keeps after a reply that ends with a group of 3 to 8 digits (a caller dictating a number), 0 (off) or 400 to 2300; the recommended first step for Czech agents that take dictated numbers is 800. null means not set, so the engine default (0, off) applies. Used only by the engine."},"turnLongSpeechFloorMs":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}],"description":"Silence floor in milliseconds the volai engine keeps after the caller spoke for longer than turnLongSpeechSecs, 0 (off) or 400 to 2300. null means not set, so the engine default (0, off) applies. Used only by the engine."},"turnLongSpeechSecs":{"anyOf":[{"type":"number"},{"type":"null"}],"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30. null means not set, so the engine default (5) applies. Has no effect while turnLongSpeechFloorMs is off."},"inboundVariables":{"description":"Default values for {{variable}} placeholders on inbound calls, merged into the call's dynamic variables only for names the inbound call does not supply itself (caller_number, called_number, attempt_id, volai_*, trial_*, system__*). Absent when the agent has none. Not used on outbound calls. Works for either provider.","type":"object","propertyNames":{"type":"string"},"additionalProperties":{"type":"string"}},"workflow":{"description":"Call split into phases (nodes). Absent means the agent runs as a single phase, as before. See the \"Call phases (workflow)\" section for the full shape, limits and an example.","type":"object","properties":{"version":{"type":"number","const":1,"description":"Workflow format version, currently always 1."},"entry":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node the call starts in. Must exist among nodes."},"nodes":{"maxItems":16,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Machine id of this node: lowercase letters, digits and underscores, starting with a letter, up to 32 characters. Must be unique within the workflow. The words start, start_node, end and end_node are reserved."},"label":{"type":"string","minLength":1,"maxLength":60,"description":"Human-readable phase name, 1 to 60 characters."},"prompt":{"description":"Prompt addition that only applies while the call is in this node, up to 2000 characters. The agent's base systemPrompt should only hold what is true in every phase.","type":"string","maxLength":2000},"knowledge":{"description":"Extra knowledge that only applies in this node, up to 4000 characters. prompt and knowledge combined must not exceed 4000 characters for one node.","type":"string","maxLength":4000},"toolIds":{"description":"Ids of account tools (from list_tools) visible only while the call is in this node, at most 10. A tool not assigned to any node stays visible in every node.","maxItems":10,"type":"array","items":{"type":"string","minLength":1,"maxLength":100}},"enterPhrase":{"description":"Sentence spoken immediately on entering this node, at most once per call, up to 160 characters.","type":"string","maxLength":160},"enterBehavior":{"description":"Defaults to \"reply\". \"wait\" means the model does not answer in the same turn after speaking enterPhrase and waits for the caller instead; requires enterPhrase.","type":"string","enum":["reply","wait"]}},"required":["id","label"]},"description":"Call phases, 2 to 8 nodes."},"edges":{"maxItems":48,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,47}$","description":"Machine id of this edge: lowercase letters, digits and underscores, starting with a letter, up to 48 characters. Must be unique within the workflow."},"from":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge leaves."},"to":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge enters. Must differ from from."},"condition":{"type":"string","minLength":1,"maxLength":2000,"description":"When to take this edge, written about what the CALLER said (never about what the agent or a tool did), 5 to 200 characters. Goes verbatim into the description of the switch_to_{to} tool."}},"required":["id","from","to","condition"]},"description":"Transitions between phases, 1 to 24 edges, at most 5 leaving any one node."}},"required":["version","entry","nodes","edges"]},"calendar":{"description":"Calendar availability rules for check_availability/book_appointment on volai's own voice engine. Absent means the agent does not book appointments. Effective only once provider is engine - see calendar_pending_engine_switch in warnings.","type":"object","properties":{"integrationId":{"type":"string","description":"Id of the connected calendar integration this agent books through, from list_integrations."},"calendarId":{"type":"string","description":"Id of the specific calendar within that connection, from list_calendars. The agent writes appointments into this calendar, so it must be writable (accessRole owner or writer); a read-only calendar is rejected with calendar_invalid_calendar."},"busyCalendarIds":{"description":"Other calendars in the same connection whose events also block a slot; nothing is written into them, so read-only calendars are fine. At most 4, without duplicates and without calendarId.","type":"array","items":{"type":"string"}},"timezone":{"type":"string","description":"IANA timezone the windows and spoken times are interpreted in, for example Europe/Prague."},"slotMinutes":{"anyOf":[{"type":"number","const":15},{"type":"number","const":30},{"type":"number","const":45},{"type":"number","const":60},{"type":"number","const":90},{"type":"number","const":120}],"description":"Length of each offered appointment slot in minutes."},"minNoticeMinutes":{"type":"number","description":"Minimum notice before the earliest offered slot, in minutes."},"horizonDays":{"type":"number","description":"How many days ahead the agent searches for a free slot."},"bufferMinutes":{"type":"number","description":"Buffer kept free immediately before and after every busy event, in minutes."},"windows":{"type":"object","properties":{"mon":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Monday. An empty array means no availability that day."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Tuesday. An empty array means no availability that day."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Wednesday. An empty array means no availability that day."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Thursday. An empty array means no availability that day."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Friday. An empty array means no availability that day."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Saturday. An empty array means no availability that day."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Sunday. An empty array means no availability that day."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows for every weekday. At least one weekday needs a non-empty window."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"]},"missedCallSms":{"type":"object","properties":{"enabled":{"type":"boolean"},"text":{"type":"string"}},"required":["enabled"],"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). enabled: false when off. text is a custom template (up to 320 characters); absent uses the default text in the agent's language."},"suspended":{"type":"boolean","description":"Whether the volai operator has manually suspended this agent. A suspended agent can't receive or make calls or send missed-call SMS; its settings stay editable. A suspension of the whole account is reported as the `account_suspended` error on every request instead."},"laughterEffective":{"anyOf":[{"type":"object","properties":{"active":{"type":"boolean"},"reason":{"type":"string","description":"Why the effective state is what it is. Known values: disabled, deny_invalid, no_agent_id, agent_denied, agent_not_listed, setting_absent, agent_off, voice_not_listed, language, provider, language_text, prompt_unrendered, sensitive_prompt, ok, ok_forced, not_engine. The engine may add further values; treat any unlisted one as \"not laughing right now\"."},"sensitiveCategory":{"anyOf":[{"type":"string"},{"type":"null"}]}},"required":["active","reason","sensitiveCategory"]},{"type":"null"}],"description":"Laugh policy outcome for the currently published configuration, computed fresh outside of any call. null means the state could not be determined right now (for example the engine did not respond) - never a guess."}},"required":["id","name","language","systemPrompt","provider","createdAt","status","goal","knowledge","notifyEmail","silencePromptSecs","laughter","firstMessageProtectSecs","silencePromptText","sttLanguageHintsStrict","turnDigitTailFloorMs","turnLongSpeechFloorMs","turnLongSpeechSecs","missedCallSms","suspended","laughterEffective"]}},"required":["agent"]}}}},"401":{"description":"Error codes: unauthorized (request).","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"WWW-Authenticate":{"description":"Bearer authentication challenge for an invalid or missing API key.","schema":{"type":"string","example":"Bearer realm=\"volai\", error=\"invalid_token\""}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. 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Other 429 responses, for example the daily SMS cap or a number purchase that is still running, do not carry it: follow the error message instead.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"object","properties":{"code":{"type":"string"},"cause":{"type":"string","enum":["request","account","busy","service"]},"message":{"type":"string"},"action":{"type":"string"},"currentRevision":{"type":"number"},"details":{"type":"object","properties":{"reason":{"type":"string","const":"task_changed_during_registration"},"providerActionStarted":{"type":"boolean","const":false},"operationId":{"type":"string"}},"required":["reason","providerActionStarted","operationId"]},"confirmUrl":{"description":"Only on subscription_confirmation_required (409): the portal page where a person signed in to the account confirms the change. 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Handoff is turned off with an empty string: `\"transferTo\": \"\"`.","parameters":[{"name":"id","in":"path","required":true,"schema":{"type":"string"}}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"name":{"type":"string","maxLength":60,"description":"Display name of the agent. Leading and trailing whitespace is trimmed.","minLength":1},"systemPrompt":{"type":"string","maxLength":6000,"description":"Instructions governing every call. Describe the role, facts the agent may use and when to hand off; do not include secrets. Whitespace is trimmed.","minLength":10},"firstMessage":{"type":"string","maxLength":2000,"description":"Opening line spoken to the caller. Omit at creation to use the default greeting. Include a short AI disclosure; recording adds a notice automatically. A long greeting saves with a warning."},"language":{"type":"string","maxLength":10,"description":"Language spoken by the agent: Czech, Slovak, English, German or Polish. Defaults to cs at creation, where it does not by itself select a voice provider. On PATCH, a change from en, de or pl to cs or sk moves an ElevenLabs agent to the volai engine with that language's default voice; read provider in the response.","enum":["cs","sk","en","de","pl"]},"voiceId":{"type":"string","maxLength":200,"description":"Voice id from GET /v1/voices, compatible with the agent's provider. Omit when the provider is uncertain, read back the agent, then choose its voice. An empty string restores the provider's default voice."},"numberE164":{"anyOf":[{"type":"string","maxLength":32,"description":"Owned phone number to attach, in E.164 format. Omit at creation for an agent without a number. On PATCH, null detaches the number; omission leaves it unchanged."},{"type":"null","description":"Owned phone number to attach, in E.164 format. Omit at creation for an agent without a number. On PATCH, null detaches the number; omission leaves it unchanged."}],"description":"Owned phone number to attach, in E.164 format. Omit at creation for an agent without a number. On PATCH, null detaches the number; omission leaves it unchanged."},"toolIds":{"maxItems":10,"type":"array","items":{"type":"string","maxLength":64},"description":"Complete list of owned webhook tool ids from GET /v1/tools. Replaces the previous list on PATCH; [] removes all tools."},"transferTo":{"type":"string","maxLength":32,"description":"Human handoff destination in E.164 format. Must not point back to your own volai number. An empty string disables handoff. Setting a destination attempts an engine switch; read back provider to verify it succeeded."},"transferCondition":{"type":"string","maxLength":500,"description":"When the agent should transfer to the human destination. An empty string restores the default condition."},"dataFields":{"maxItems":10,"type":"array","items":{"type":"object","properties":{"key":{"type":"string","maxLength":40,"description":"Unique key in the call's data object: lowercase letter first, then lowercase letters, digits or underscores.","pattern":"^[a-z][a-z0-9_]{0,39}$"},"type":{"type":"string","enum":["string","number","boolean"],"description":"JSON value type to extract. enumValues applies only to string fields."},"description":{"type":"string","maxLength":500,"description":"Explain what the agent should capture and how to recognize it in the caller's words.","minLength":5},"enumValues":{"maxItems":20,"type":"array","items":{"type":"string","maxLength":60,"minLength":1},"description":"Allowed values for a string field. Omit or send [] for unrestricted text."}},"required":["key","type","description"]},"description":"Complete list of structured facts to extract from a call. Replaces the previous list on PATCH; [] disables extraction."},"recordCalls":{"type":"boolean","description":"Whether to record calls. Defaults to true at creation and adds a short recording notice to the greeting. You remain responsible for appropriate disclosure."},"goal":{"anyOf":[{"type":"string","maxLength":300,"description":"One sentence defining a successful call for post-call evaluation on engine agents. An empty string clears it; PATCH also accepts null."},{"type":"null","description":"One sentence defining a successful call for post-call evaluation on engine agents. An empty string clears it; PATCH also accepts null.","maxLength":300}],"description":"One sentence defining a successful call for post-call evaluation on engine agents. An empty string clears it; PATCH also accepts null.","maxLength":300},"knowledge":{"anyOf":[{"type":"string","maxLength":20000,"description":"Additional reference text for the agent, separate from its instructions. An empty string clears it; PATCH also accepts null."},{"type":"null","description":"Additional reference text for the agent, separate from its instructions. An empty string clears it; PATCH also accepts null.","maxLength":20000}],"description":"Additional reference text for the agent, separate from its instructions. An empty string clears it; PATCH also accepts null.","maxLength":20000},"notifyEmail":{"type":"boolean","description":"Whether to email the account owner a summary after each engine call. Defaults to true at creation."},"voicemail":{"anyOf":[{"type":"object","properties":{"enabled":{"type":"boolean","description":"Enable detection of a voicemail greeting during outbound calls."},"action":{"type":"string","enum":["mark","hangup","message"],"description":"mark records the detection and continues, hangup ends the call, message speaks the configured message and ends the call. message requires a nonblank message even when enabled is false."},"message":{"type":"string","maxLength":400,"description":"Text spoken into voicemail when action is message. Required and nonblank for that action; any supplied message must fit the length limit."}},"required":["enabled","action"],"description":"Outbound voicemail detection for engine agents. Creation requires the initial provider selection to be engine, before any transfer-triggered switch. On PATCH, null clears this configuration.","allOf":[{"if":{"type":"object","properties":{"action":{"const":"message"}},"required":["action"]},"then":{"required":["message"],"properties":{"message":{"type":"string","pattern":"\\S"}}}}]},{"type":"null","description":"Outbound voicemail detection for engine agents. Creation requires the initial provider selection to be engine, before any transfer-triggered switch. On PATCH, null clears this configuration.","allOf":[{"if":{"type":"object","properties":{"action":{"const":"message"}},"required":["action"]},"then":{"required":["message"],"properties":{"message":{"type":"string","pattern":"\\S"}}}}]}],"description":"Outbound voicemail detection for engine agents. Creation requires the initial provider selection to be engine, before any transfer-triggered switch. On PATCH, null clears this configuration.","allOf":[{"if":{"type":"object","properties":{"action":{"const":"message"}},"required":["action"]},"then":{"required":["message"],"properties":{"message":{"type":"string","pattern":"\\S"}}}}]},"silencePromptSecs":{"anyOf":[{"type":"integer","minimum":3,"maximum":25,"description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH."},{"type":"integer","description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH.","minimum":3,"maximum":25}],"description":"Seconds of caller silence before the agent asks once whether the caller is still there, accepted for either provider though only heard once the agent runs on the volai engine. null turns it off; omission uses the default of 10 at creation, or leaves it unchanged on PATCH.","type":"integer","minimum":3,"maximum":25},"firstMessageProtectSecs":{"description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH.","anyOf":[{"type":"number","minimum":0,"maximum":20,"description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH."},{"type":"null","description":"Seconds of the first line protected from short reactions by the person who answered, outbound calls only, accepted for either provider though only heard once the agent runs on the volai engine. While the line plays, a reaction such as \"Hello?\" does not interrupt it. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null or 0 turns it off. No default is applied: omission stores nothing at creation, or leaves the current setting unchanged on PATCH.","minimum":0,"maximum":20}],"minimum":0,"maximum":20},"silencePromptText":{"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH.","anyOf":[{"type":"string","maxLength":80,"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH."},{"type":"null","description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language, accepted for either provider though only heard once the agent runs on the volai engine. Surrounding whitespace is trimmed; null or an empty string restores the default text. No default is applied: omission stores nothing at creation, or leaves the current text unchanged on PATCH.","maxLength":80}],"maxLength":80},"sttLanguageHintsStrict":{"description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off).","anyOf":[{"type":"boolean","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off)."},{"type":"null","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply such as \"Ano\" is not written as a foreign word or in another script. Best effort, not a guarantee. Meant only for agents on the engine with language cs and outbound calls; do not turn it on for sk (Czech callers would get Slovak spelling). Stored for either provider, read only by the engine; ElevenLabs ignores it. On PATCH, true turns it on, false or null turns it off and omission leaves it unchanged. At creation, omission stores nothing (off)."}]},"turnDigitTailFloorMs":{"description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"integer","minimum":0,"maximum":2300,"description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Silence floor in milliseconds for a reply that ends with a group of 3 to 8 digits (a caller dictating a number group by group), on the volai engine: the engine waits at least this long after the caller stops before closing the reply, so the agent does not jump into the number. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected). Recommended first step for Czech agents that take dictated numbers: 800. Dates, postcodes and years get the floor too. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":0,"maximum":2300}],"minimum":0,"maximum":2300},"turnLongSpeechFloorMs":{"description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"integer","minimum":0,"maximum":2300,"description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Silence floor in milliseconds after the caller spoke for longer than turnLongSpeechSecs, on the volai engine: after a long stretch of speech callers take a breath and continue. 0 turns it off; otherwise 400 to 2300 (1 to 399 is rejected), suggested 800. Stored for either provider, used only by the engine. On PATCH, null clears the stored value (the engine default 0 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":0,"maximum":2300}],"minimum":0,"maximum":2300},"turnLongSpeechSecs":{"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing.","anyOf":[{"type":"number","minimum":1,"maximum":30,"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing."},{"type":"null","description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30, decimals allowed. Has no effect while turnLongSpeechFloorMs is 0. On PATCH, null clears the stored value (the engine default 5 applies) and omission leaves it unchanged. At creation, omission stores nothing.","minimum":1,"maximum":30}],"minimum":1,"maximum":30},"inboundVariables":{"description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","anyOf":[{"type":"object","propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"},"additionalProperties":{"type":"string","maxLength":200},"description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","maxProperties":10},{"type":"null","description":"Default values for {{variable}} placeholders on INBOUND calls, for example {\"uvod\": \"How can I help you?\"}. Merged into the call's dynamic variables only for names the inbound call does not supply itself; caller_number, called_number, attempt_id and the volai_, trial_ and system__ prefixes are reserved and rejected. Not used on outbound calls, where the variables of POST /v1/calls apply. Works for either provider. Keys are letters, digits or underscores (1 to 40 characters), values are trimmed and up to 200 characters, at most 10 keys. On PATCH the object replaces the stored values entirely; null or {} removes them all; omission leaves them unchanged. At creation, omission stores nothing.","maxProperties":10,"propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"}}],"maxProperties":10,"propertyNames":{"pattern":"^[A-Za-z0-9_]{1,40}$"}},"laughter":{"description":"Whether the agent may laugh during a call: auto follows sensitive-topic detection, on overrides that detection, off always suppresses it. on does not override everything else: the engine still needs a Cartesia voice in Czech and its own switch on. Has no effect on agents hosted on ElevenLabs. Omission stores auto explicitly at creation, or leaves the current setting unchanged on PATCH.","type":"string","enum":["auto","on","off"]},"workflow":{"anyOf":[{"type":"object","properties":{"version":{"type":"number","const":1,"description":"Workflow format version, currently always 1."},"entry":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node the call starts in. Must exist among nodes."},"nodes":{"maxItems":8,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Machine id of this node: lowercase letters, digits and underscores, starting with a letter, up to 32 characters. Must be unique within the workflow. The words start, start_node, end and end_node are reserved."},"label":{"type":"string","minLength":1,"maxLength":60,"description":"Human-readable phase name, 1 to 60 characters."},"prompt":{"description":"Prompt addition that only applies while the call is in this node, up to 2000 characters. The agent's base systemPrompt should only hold what is true in every phase.","type":"string","maxLength":2000},"knowledge":{"description":"Extra knowledge that only applies in this node, up to 4000 characters. prompt and knowledge combined must not exceed 4000 characters for one node.","type":"string","maxLength":4000},"toolIds":{"description":"Ids of account tools (from list_tools) visible only while the call is in this node, at most 10. A tool not assigned to any node stays visible in every node.","maxItems":10,"type":"array","items":{"type":"string","minLength":1,"maxLength":100}},"enterPhrase":{"description":"Sentence spoken immediately on entering this node, at most once per call, up to 160 characters.","type":"string","maxLength":160},"enterBehavior":{"description":"Defaults to \"reply\". \"wait\" means the model does not answer in the same turn after speaking enterPhrase and waits for the caller instead; requires enterPhrase.","type":"string","enum":["reply","wait"]}},"required":["id","label"],"additionalProperties":false},"description":"Call phases, 2 to 8 nodes.","minItems":2},"edges":{"maxItems":24,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,47}$","description":"Machine id of this edge: lowercase letters, digits and underscores, starting with a letter, up to 48 characters. Must be unique within the workflow."},"from":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge leaves."},"to":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge enters. Must differ from from."},"condition":{"type":"string","minLength":1,"maxLength":2000,"description":"When to take this edge, written about what the CALLER said (never about what the agent or a tool did), 5 to 200 characters. Goes verbatim into the description of the switch_to_{to} tool."}},"required":["id","from","to","condition"],"additionalProperties":false},"description":"Transitions between phases, 1 to 24 edges, at most 5 leaving any one node.","minItems":1}},"required":["version","entry","nodes","edges"],"additionalProperties":false,"description":"Call phases that add local instructions, knowledge and tools. Omit at creation for one shared scope; PATCH null removes phases. Publish requires a reachable graph, at most 5 outgoing edges per node, and prompt plus knowledge at most 4000 characters per node."},{"type":"null","description":"Call phases that add local instructions, knowledge and tools. Omit at creation for one shared scope; PATCH null removes phases. Publish requires a reachable graph, at most 5 outgoing edges per node, and prompt plus knowledge at most 4000 characters per node."}],"description":"Call phases that add local instructions, knowledge and tools. Omit at creation for one shared scope; PATCH null removes phases. Publish requires a reachable graph, at most 5 outgoing edges per node, and prompt plus knowledge at most 4000 characters per node."},"calendar":{"anyOf":[{"type":"object","properties":{"integrationId":{"type":"string","description":"Id of the connected calendar integration this agent books through, from list_integrations."},"calendarId":{"type":"string","description":"Id of the specific calendar within that connection, from list_calendars. The agent writes appointments into this calendar, so it must be writable (accessRole owner or writer); a read-only calendar is rejected with calendar_invalid_calendar."},"busyCalendarIds":{"description":"Other calendars in the same connection whose events also block a slot; nothing is written into them, so read-only calendars are fine. At most 4, without duplicates and without calendarId.","type":"array","items":{"type":"string"}},"timezone":{"type":"string","description":"IANA timezone the windows and spoken times are interpreted in, for example Europe/Prague."},"slotMinutes":{"anyOf":[{"type":"number","const":15},{"type":"number","const":30},{"type":"number","const":45},{"type":"number","const":60},{"type":"number","const":90},{"type":"number","const":120}],"description":"Length of each offered appointment slot in minutes."},"minNoticeMinutes":{"type":"number","description":"Minimum notice before the earliest offered slot, in minutes."},"horizonDays":{"type":"number","description":"How many days ahead the agent searches for a free slot."},"bufferMinutes":{"type":"number","description":"Buffer kept free immediately before and after every busy event, in minutes."},"windows":{"type":"object","properties":{"mon":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Monday. An empty array means no availability that day."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Tuesday. An empty array means no availability that day."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Wednesday. An empty array means no availability that day."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Thursday. An empty array means no availability that day."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Friday. An empty array means no availability that day."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Saturday. An empty array means no availability that day."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of this window as local time HH:MM in the agent's calendar timezone."},"to":{"type":"string","description":"End of this window as local time HH:MM in the agent's calendar timezone."}},"required":["from","to"]},"description":"Availability windows on Sunday. An empty array means no availability that day."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows for every weekday. At least one weekday needs a non-empty window."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"],"description":"Calendar availability rules so the agent can check availability and book appointments during a call, effective only once the agent's provider is engine - see calendar_pending_engine_switch in warnings otherwise. Creation only sets it. On PATCH, null clears it; omission leaves it unchanged."},{"type":"null","description":"Calendar availability rules so the agent can check availability and book appointments during a call, effective only once the agent's provider is engine - see calendar_pending_engine_switch in warnings otherwise. Creation only sets it. On PATCH, null clears it; omission leaves it unchanged."}],"description":"Calendar availability rules so the agent can check availability and book appointments during a call, effective only once the agent's provider is engine - see calendar_pending_engine_switch in warnings otherwise. Creation only sets it. On PATCH, null clears it; omission leaves it unchanged."},"missedCallSms":{"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). Omission leaves SMS off at creation, or unchanged on PATCH; send { enabled: false } to turn it off.","type":"object","properties":{"enabled":{"type":"boolean","description":"Whether the missed-call SMS is on."},"text":{"type":"string","maxLength":320,"description":"Custom SMS template using {firma}/{cislo}/{agent}; any other {...} variable is rejected. Omit for the default text in the agent's language."}},"required":["enabled"],"additionalProperties":false}}}}}},"responses":{"200":{"description":"Updated agent","headers":{"X-Request-Id":{"description":"Unique request ID for this response, in the form req_ followed by 16 hexadecimal characters.","schema":{"type":"string","pattern":"^req_[0-9a-f]{16}$"}},"X-Volai-Version":{"description":"Current public interface version. If it changed, read GET /v1/changelog.","schema":{"type":"string"}},"RateLimit-Limit":{"description":"Maximum authenticated requests in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Remaining":{"description":"Authenticated requests remaining in the current rate-limit window.","schema":{"type":"integer"}},"RateLimit-Reset":{"description":"Seconds until the authenticated rate-limit window resets.","schema":{"type":"integer"}}},"content":{"application/json":{"schema":{"type":"object","properties":{"agent":{"type":"object","properties":{"id":{"type":"string"},"name":{"type":"string"},"language":{"type":"string"},"systemPrompt":{"type":"string"},"firstMessage":{"type":"string"},"voiceId":{"type":"string"},"provider":{"type":"string","enum":["elevenlabs","engine"]},"numberE164":{"type":"string"},"createdAt":{"type":"number"},"status":{"type":"string","enum":["active","deleted"]},"toolIds":{"type":"array","items":{"type":"string"}},"transferTo":{"type":"string"},"transferCondition":{"type":"string"},"dataFields":{"type":"array","items":{"type":"object","properties":{"key":{"type":"string"},"type":{"type":"string","enum":["string","number","boolean"]},"description":{"type":"string"},"enumValues":{"type":"array","items":{"type":"string"}}},"required":["key","type","description"]}},"recordCalls":{"type":"boolean"},"goal":{"anyOf":[{"type":"string"},{"type":"null"}]},"knowledge":{"anyOf":[{"type":"string"},{"type":"null"}]},"notifyEmail":{"type":"boolean"},"voicemail":{"type":"object","properties":{"enabled":{"type":"boolean"},"action":{"type":"string","enum":["mark","hangup","message"]},"message":{"type":"string"}},"required":["enabled","action"]},"silencePromptSecs":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}]},"laughter":{"type":"string","enum":["auto","on","off"]},"firstMessageProtectSecs":{"anyOf":[{"type":"number"},{"type":"null"}],"description":"Seconds of the first line protected from short reactions by the person who answered (outbound calls on the volai engine), 0 to 20. A reply without an interrupting word (for example stop, no, wait) is dropped in that window: it does not interrupt the line, is not in the transcript and the agent does not react to it; an interrupting word still interrupts it. The interrupting words follow the agent's language: an English agent is interrupted by stop, no, wait or hold. null means not set, so the engine plays the first line as before."},"silencePromptText":{"anyOf":[{"type":"string"},{"type":"null"}],"description":"Your own sentence for the silence reminder, spoken word for word instead of the default reminder for the agent's language. null means the default text is used. Heard only once the agent runs on the volai engine."},"sttLanguageHintsStrict":{"type":"boolean","description":"Strict language lock for speech recognition on the volai engine (Soniox language_hints_strict): the transcript strongly prefers the agent's language, so a short reply is not written as a foreign word or in another script. Best effort; meant for cs agents with outbound calls, never for sk. false when not set. Read only by the engine, ElevenLabs ignores it."},"turnDigitTailFloorMs":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}],"description":"Silence floor in milliseconds the volai engine keeps after a reply that ends with a group of 3 to 8 digits (a caller dictating a number), 0 (off) or 400 to 2300; the recommended first step for Czech agents that take dictated numbers is 800. null means not set, so the engine default (0, off) applies. Used only by the engine."},"turnLongSpeechFloorMs":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}],"description":"Silence floor in milliseconds the volai engine keeps after the caller spoke for longer than turnLongSpeechSecs, 0 (off) or 400 to 2300. null means not set, so the engine default (0, off) applies. Used only by the engine."},"turnLongSpeechSecs":{"anyOf":[{"type":"number"},{"type":"null"}],"description":"Speech length in seconds above which turnLongSpeechFloorMs applies, 1 to 30. null means not set, so the engine default (5) applies. Has no effect while turnLongSpeechFloorMs is off."},"inboundVariables":{"description":"Default values for {{variable}} placeholders on inbound calls, merged into the call's dynamic variables only for names the inbound call does not supply itself (caller_number, called_number, attempt_id, volai_*, trial_*, system__*). Absent when the agent has none. Not used on outbound calls. Works for either provider.","type":"object","propertyNames":{"type":"string"},"additionalProperties":{"type":"string"}},"workflow":{"description":"Call split into phases (nodes). Absent means the agent runs as a single phase, as before. See the \"Call phases (workflow)\" section for the full shape, limits and an example.","type":"object","properties":{"version":{"type":"number","const":1,"description":"Workflow format version, currently always 1."},"entry":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node the call starts in. Must exist among nodes."},"nodes":{"maxItems":16,"type":"array","items":{"type":"object","properties":{"id":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Machine id of this node: lowercase letters, digits and underscores, starting with a letter, up to 32 characters. Must be unique within the workflow. The words start, start_node, end and end_node are reserved."},"label":{"type":"string","minLength":1,"maxLength":60,"description":"Human-readable phase name, 1 to 60 characters."},"prompt":{"description":"Prompt addition that only applies while the call is in this node, up to 2000 characters. The agent's base systemPrompt should only hold what is true in every phase.","type":"string","maxLength":2000},"knowledge":{"description":"Extra knowledge that only applies in this node, up to 4000 characters. prompt and knowledge combined must not exceed 4000 characters for one node.","type":"string","maxLength":4000},"toolIds":{"description":"Ids of account tools (from list_tools) visible only while the call is in this node, at most 10. 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Empty array means no offers that day, at most 4 windows."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Tuesday. Empty array means no offers that day, at most 4 windows."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Wednesday. Empty array means no offers that day, at most 4 windows."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Thursday. Empty array means no offers that day, at most 4 windows."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Friday. Empty array means no offers that day, at most 4 windows."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Saturday. Empty array means no offers that day, at most 4 windows."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Sunday. Empty array means no offers that day, at most 4 windows."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows per weekday (mon..sun), each HH:MM-HH:MM, at most 4 per day, empty array = no offers that day."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"]},{"type":"null"}]},"missedCallSms":{"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). text is a custom template (up to 320 characters) using {firma}/{cislo}/{agent}; omit for the default text in the agent's language. 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Empty array means no offers that day, at most 4 windows."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Tuesday. Empty array means no offers that day, at most 4 windows."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Wednesday. Empty array means no offers that day, at most 4 windows."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Thursday. Empty array means no offers that day, at most 4 windows."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Friday. Empty array means no offers that day, at most 4 windows."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Saturday. Empty array means no offers that day, at most 4 windows."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"]},"description":"Availability windows on Sunday. Empty array means no offers that day, at most 4 windows."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"description":"Availability windows per weekday (mon..sun), each HH:MM-HH:MM, at most 4 per day, empty array = no offers that day."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"]},{"type":"null"}]},"missedCallSms":{"description":"Send an SMS to the caller when this agent misses the call (unanswered outbound, missed inbound). text is a custom template (up to 320 characters) using {firma}/{cislo}/{agent}; omit for the default text in the agent's language. 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Must be unique within the workflow."},"from":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge leaves."},"to":{"type":"string","pattern":"^[a-z][a-z0-9_]{0,31}$","description":"Id of the node this edge enters. Must differ from from."},"condition":{"type":"string","minLength":1,"maxLength":2000,"description":"When to take this edge, written about what the CALLER said (never about what the agent or a tool did), 5 to 200 characters. Goes verbatim into the description of the switch_to_{to} tool."}},"required":["id","from","to","condition"],"additionalProperties":false},"description":"Transitions between phases, 1 to 24 edges, at most 5 leaving any one node."}},"required":["version","entry","nodes","edges"],"additionalProperties":false},"calendar":{"description":"Calendar availability the agent books appointments against. Only takes effect on the volai engine (omit or connect one via /propojeni first). Omit the key to leave the agent's calendar untouched; null disconnects it; an object sets it.","anyOf":[{"type":"object","properties":{"integrationId":{"type":"string","minLength":1,"description":"Id of the connected calendar integration (kind calendar) from list_connections."},"calendarId":{"type":"string","minLength":1,"description":"Id of the specific calendar within that connection, from find_calendars/list_calendars. The agent writes appointments into this calendar, so it must be writable (accessRole owner or writer); a read-only calendar is rejected with calendar_invalid_calendar."},"busyCalendarIds":{"description":"Other calendars in the same connection whose events also block a slot; nothing is written into them, so read-only calendars are fine. At most 4, without duplicates and without calendarId.","type":"array","items":{"type":"string","minLength":1}},"timezone":{"type":"string","minLength":1,"description":"IANA time zone the calendar rules are interpreted in, e.g. Europe/Prague."},"slotMinutes":{"anyOf":[{"type":"number","const":15},{"type":"number","const":30},{"type":"number","const":45},{"type":"number","const":60},{"type":"number","const":90},{"type":"number","const":120}],"description":"Appointment length in minutes: one of 15, 30, 45, 60, 90, 120."},"minNoticeMinutes":{"type":"number","description":"Minimum notice in minutes before the next bookable slot."},"horizonDays":{"type":"number","description":"How many days ahead the agent searches for a free slot."},"bufferMinutes":{"type":"number","description":"Buffer in minutes kept free before and after every busy event."},"windows":{"type":"object","properties":{"mon":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Monday. Empty array means no offers that day, at most 4 windows."},"tue":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Tuesday. Empty array means no offers that day, at most 4 windows."},"wed":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Wednesday. Empty array means no offers that day, at most 4 windows."},"thu":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Thursday. Empty array means no offers that day, at most 4 windows."},"fri":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Friday. Empty array means no offers that day, at most 4 windows."},"sat":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Saturday. Empty array means no offers that day, at most 4 windows."},"sun":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"Start of the window as HH:MM, in the calendar's timezone."},"to":{"type":"string","description":"End of the window as HH:MM, must be after from."}},"required":["from","to"],"additionalProperties":false},"description":"Availability windows on Sunday. Empty array means no offers that day, at most 4 windows."}},"required":["mon","tue","wed","thu","fri","sat","sun"],"additionalProperties":false,"description":"Availability windows per weekday (mon..sun), each HH:MM-HH:MM, at most 4 per day, empty array = no offers that day."}},"required":["integrationId","calendarId","timezone","slotMinutes","minNoticeMinutes","horizonDays","bufferMinutes","windows"],"additionalProperties":false},{"type":"null"}]},"missedCallSms":{"description":"Send an SMS to the caller when this agent misses the call. Absent means unchanged, not off; send { enabled: false } to turn it off.","type":"object","properties":{"enabled":{"type":"boolean","description":"Whether the missed-call SMS is on."},"text":{"description":"Custom SMS template using {firma}/{cislo}/{agent}; any other {...} variable is rejected. 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