This webhook uses Telnyx headers (telnyx-timestamp, telnyx-signature-ed25519) that are compatible with Standard Webhooks specification for SDK generation. Custom validation logic can map these to standard webhook-timestamp and webhook-signature equivalents. See https://github.com/standard-webhooks/standard-webhooks for details.
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/call_control_applications/{id}","href":"/api-reference/call-control-applications/delete-a-call-control-application"},{"title":"Retrieve a call control application","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json get /call_control_applications/{id}","href":"/api-reference/call-control-applications/retrieve-a-call-control-application"},{"title":"Update a call control application","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json patch /call_control_applications/{id}","href":"/api-reference/call-control-applications/update-a-call-control-application"}]},{"group":"Active Calls","pages":[{"title":"List all active calls for given connection","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json get /connections/{connection_id}/active_calls","href":"/api-reference/call-information/list-all-active-calls-for-given-connection"}]},{"group":"Call 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A successful response will include a `call_leg_id` which can be used to correlate the command with subsequent webhooks.\n\nTo place the call with an AI assistant from the start, include `assistant.id` and any per-call overrides in the `assistant` object; Telnyx attempts to warm up the assistant before placing the call and starts it automatically when the called party answers.\n\n**Expected Webhooks:**\n\n- `call.initiated`\n- `call.answered` or `call.hangup`\n- `call.conversation.created` when the requested assistant conversation is created, or `call.conversation.start_failed` when it could not be started after the called party answered\n- `call.hold` and `call.unhold` if the call is held/unheld\n- `call.machine.detection.ended` if `answering_machine_detection` was requested\n- `call.machine.greeting.ended` if `answering_machine_detection` was requested to detect the end of machine greeting\n- `call.machine.premium.detection.ended` if `answering_machine_detection=premium` was requested\n- `call.machine.premium.greeting.ended` if `answering_machine_detection=premium` was requested and a beep was detected\n- `call.machine.premium.call_screening.detected` if `answering_machine_detection=premium_ios_call_screening_detection` was requested and an Apple Call Screening tone was detected\n- `call.deepfake_detection.result` if `deepfake_detection` was enabled\n- `call.deepfake_detection.error` if `deepfake_detection` was enabled and an error occurred\n- `streaming.started`, `streaming.stopped` or `streaming.failed` if `stream_url` was set\n\nWhen the `record` parameter is set to `record-from-answer`, the response will include a `recording_id` field.\n","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /calls","href":"/api-reference/call-commands/dial"}]},{"group":"Callbacks API","pages":[{"title":"Call answered","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callAnswered","href":"/api-reference/callbacks/call-answered"},{"title":"Call conversation created","description":"Emitted when a conversation is created for a call, including when an AI assistant starts automatically after an `answer` command with `assistant.id` or a `dial` command with `assistant.id`, or through `ai_assistant_start` or `gather_using_ai`. Read `data.payload.conversation_id` and correlate it with `data.payload.call_control_id`.\n\nFor the answer-with-assistant flow, the `answer` response does not include the conversation ID. This webhook supplies it during assistant startup without waiting for `call.conversation.ended` or polling the Conversations API. It is delivered to the configured Call Control webhook URL and does not require `send_message_history_updates`.\n\nThe event indicates that the conversation was created; it does not confirm that the assistant is ready to speak or that greeting audio has started.\n\nThis webhook uses Telnyx headers (telnyx-timestamp, telnyx-signature-ed25519) that are compatible with Standard Webhooks specification for SDK generation. Custom validation logic can map these to standard webhook-timestamp and webhook-signature equivalents. See https://github.com/standard-webhooks/standard-webhooks for details.","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callConversationCreated","href":"/api-reference/callbacks/call-conversation-created"},{"title":"Call conversation start failed","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callConversationStartFailed","href":"/api-reference/callbacks/call-conversation-start-failed"},{"title":"Call cost","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callCost","href":"/api-reference/callbacks/call-cost"},{"title":"Call deepfake detection error","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callDeepfakeDetectionError","href":"/api-reference/callbacks/call-deepfake-detection-error"},{"title":"Call deepfake detection result","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callDeepfakeDetectionResult","href":"/api-reference/callbacks/call-deepfake-detection-result"},{"title":"Call hold","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callHold","href":"/api-reference/callbacks/call-hold"},{"title":"Call initiated","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callInitiated","href":"/api-reference/callbacks/call-initiated"},{"title":"Call streaming failed","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callStreamingFailed","href":"/api-reference/callbacks/call-streaming-failed"},{"title":"Call streaming started","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callStreamingStarted","href":"/api-reference/callbacks/call-streaming-started"},{"title":"Call streaming stopped","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callStreamingStopped","href":"/api-reference/callbacks/call-streaming-stopped"},{"title":"Call unhold","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callUnhold","href":"/api-reference/callbacks/call-unhold"}]}]},{"group":"Answer","pages":[{"group":"Call Commands API","pages":[{"title":"Answer call","description":"Answer an incoming call. You must issue this command before executing subsequent commands on an incoming call.\n\nTo answer with an AI assistant, include `assistant.id` and any per-call overrides in the `assistant` object. Telnyx attempts to warm up the assistant before answering the call, then starts the assistant automatically when the call is answered. Do not also send `ai_assistant_start` for this flow. The HTTP success response can arrive before the call is answered; use the `call.answered` webhook to track the answer. If warm-up fails, Telnyx falls back to starting the assistant after answering.\n\nWhen `assistant.id` is supplied, obtain the conversation ID from `data.payload.conversation_id` in the [call.conversation.created](/api-reference/callbacks/call-conversation-created) webhook and correlate it using `data.payload.call_control_id`. The `answer` HTTP response does not include `conversation_id`. The created event is emitted during assistant startup and does not indicate that the assistant is ready to speak.\n\nSet the assistant voice with `assistant.voice_settings.voice` and speech-to-text settings with `assistant.transcription`. You can reuse one stored assistant with different per-call settings. Warm-up prepares assistant configuration and dependencies; it does not wait for the greeting audio to be ready or guarantee zero silence after answer. A plain `answer` followed by `ai_assistant_start` performs assistant startup after the call has already been answered.\n\n**Expected Webhooks:**\n\n- `call.answered`\n- `call.conversation.created` when the requested assistant conversation is created\n- `call.hold` and `call.unhold` if the call is held/unheld\n- `call.deepfake_detection.result` if `deepfake_detection` was enabled\n- `call.deepfake_detection.error` if `deepfake_detection` was enabled and an error occurred\n- `streaming.started`, `streaming.stopped` or `streaming.failed` if `stream_url` was set\n\nWhen the `record` parameter is set to `record-from-answer`, the response will include a `recording_id` field.\n","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /calls/{call_control_id}/actions/answer","href":"/api-reference/call-commands/answer-call"}]},{"group":"Callbacks API","pages":[{"title":"Call answered","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook callAnswered","href":"/api-reference/callbacks/call-answered"},{"title":"Call conversation created","description":"Emitted when a conversation is created for a call, including when an AI assistant starts automatically after an `answer` command with `assistant.id` or a `dial` command with `assistant.id`, or through `ai_assistant_start` or `gather_using_ai`. 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stop","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/record_stop","href":"/api-reference/conference-commands/conference-recording-stop"},{"title":"Speak text to conference participants","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/speak","href":"/api-reference/conference-commands/speak-text-to-conference-participants"},{"title":"Stop audio being played on the conference","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/stop","href":"/api-reference/conference-commands/stop-audio-being-played-on-the-conference"},{"title":"Unhold conference participants","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/unhold","href":"/api-reference/conference-commands/unhold-conference-participants"},{"title":"Unmute conference participants","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/unmute","href":"/api-reference/conference-commands/unmute-conference-participants"},{"title":"Update conference participant","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/update","href":"/api-reference/conference-commands/update-conference-participant"},{"title":"End a conference","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json post /conferences/{id}/actions/end","href":"/api-reference/conference-commands/end-a-conference"},{"title":"Gather DTMF using audio prompt in a 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/conferences/{id}/participants/{participant_id}","href":"/api-reference/conference-commands/retrieve-a-conference-participant"},{"title":"Update a conference participant","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/call-control.json patch /conferences/{id}/participants/{participant_id}","href":"/api-reference/conference-commands/update-a-conference-participant"}]},{"group":"Callbacks API","pages":[{"title":"Conference created","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceCreated","href":"/api-reference/callbacks/conference-created"},{"title":"Conference ended","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceEnded","href":"/api-reference/callbacks/conference-ended"},{"title":"Conference floor changed","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceFloorChanged","href":"/api-reference/callbacks/conference-floor-changed"},{"title":"Conference participant joined","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantJoined","href":"/api-reference/callbacks/conference-participant-joined"},{"title":"Conference participant left","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantLeft","href":"/api-reference/callbacks/conference-participant-left"},{"title":"Conference participant playback ended","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantPlaybackEnded","href":"/api-reference/callbacks/conference-participant-playback-ended"},{"title":"Conference participant playback started","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantPlaybackStarted","href":"/api-reference/callbacks/conference-participant-playback-started"},{"title":"Conference participant speak ended","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantSpeakEnded","href":"/api-reference/callbacks/conference-participant-speak-ended"},{"title":"Conference participant speak started","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceParticipantSpeakStarted","href":"/api-reference/callbacks/conference-participant-speak-started"},{"title":"Conference playback ended","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferencePlaybackEnded","href":"/api-reference/callbacks/conference-playback-ended"},{"title":"Conference playback started","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferencePlaybackStarted","href":"/api-reference/callbacks/conference-playback-started"},{"title":"Conference recording saved","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceRecordingSaved","href":"/api-reference/callbacks/conference-recording-saved"},{"title":"Conference speak ended","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceSpeakEnded","href":"/api-reference/callbacks/conference-speak-ended"},{"title":"Conference speak started","version":null,"deprecated":null,"openapi":"/openapi/source/external/call-control/call-control.json webhook conferenceSpeakStarted","href":"/api-reference/callbacks/conference-speak-started"}]}]}]},{"group":"Pay Connectors API","pages":[{"title":"Create a Pay connector","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/pay-connectors.json post /pay_connectors","href":"/api-reference/pay-connectors/create-a-pay-connector"},{"title":"List Pay connectors","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/pay-connectors.json get /pay_connectors","href":"/api-reference/pay-connectors/list-pay-connectors"},{"title":"Retrieve a Pay connector","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/pay-connectors.json get /pay_connectors/{name}","href":"/api-reference/pay-connectors/retrieve-a-pay-connector"},{"title":"Update a Pay connector","deprecated":null,"version":null,"openapi":"/openapi/source/external/call-control/pay-connectors.json patch /pay_connectors/{name}","href":"/api-reference/pay-connectors/update-a-pay-connector"},{"title":"Delete a Pay 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