{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://elevenlabs.io/schemas/elevenlabs/webhook-event.json",
  "title": "ElevenLabs Webhook Event",
  "description": "Represents a webhook event payload delivered by ElevenLabs to configured endpoints. Covers post-call transcriptions, audio recordings, call failures, and workspace events.",
  "type": "object",
  "required": ["event_type"],
  "discriminator": {
    "propertyName": "event_type"
  },
  "properties": {
    "event_type": {
      "type": "string",
      "description": "The type of webhook event being delivered.",
      "enum": [
        "post_call_transcription",
        "post_call_audio",
        "call_initiation_failure",
        "workspace_event"
      ]
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the event occurred."
    }
  },
  "oneOf": [
    {
      "$ref": "#/$defs/PostCallTranscriptionEvent"
    },
    {
      "$ref": "#/$defs/PostCallAudioEvent"
    },
    {
      "$ref": "#/$defs/CallInitiationFailureEvent"
    },
    {
      "$ref": "#/$defs/WorkspaceEvent"
    }
  ],
  "$defs": {
    "PostCallTranscriptionEvent": {
      "type": "object",
      "description": "Webhook event containing the full transcript of a completed Conversational AI conversation.",
      "required": ["event_type", "conversation_id", "agent_id", "transcript"],
      "properties": {
        "event_type": {
          "type": "string",
          "const": "post_call_transcription",
          "description": "Event type identifier for post-call transcriptions."
        },
        "conversation_id": {
          "type": "string",
          "description": "Unique identifier for the completed conversation."
        },
        "agent_id": {
          "type": "string",
          "description": "Identifier of the agent that participated in the conversation."
        },
        "transcript": {
          "type": "array",
          "description": "Ordered list of conversation turns with speaker roles and timestamps.",
          "items": {
            "$ref": "#/$defs/TranscriptTurn"
          }
        },
        "metadata": {
          "$ref": "#/$defs/ConversationMetadata"
        }
      }
    },
    "PostCallAudioEvent": {
      "type": "object",
      "description": "Webhook event containing the audio recording of a completed conversation, delivered via chunked transfer encoding.",
      "required": ["event_type", "conversation_id", "agent_id"],
      "properties": {
        "event_type": {
          "type": "string",
          "const": "post_call_audio",
          "description": "Event type identifier for post-call audio."
        },
        "conversation_id": {
          "type": "string",
          "description": "Unique identifier for the completed conversation."
        },
        "agent_id": {
          "type": "string",
          "description": "Identifier of the agent that participated in the conversation."
        },
        "audio_format": {
          "type": "string",
          "description": "The format of the audio data."
        }
      }
    },
    "CallInitiationFailureEvent": {
      "type": "object",
      "description": "Webhook event sent when a Conversational AI call fails to initiate.",
      "required": ["event_type", "agent_id", "error"],
      "properties": {
        "event_type": {
          "type": "string",
          "const": "call_initiation_failure",
          "description": "Event type identifier for call initiation failures."
        },
        "agent_id": {
          "type": "string",
          "description": "Identifier of the agent that failed to start a call."
        },
        "error": {
          "type": "string",
          "description": "Description of the error that prevented call initiation."
        },
        "timestamp": {
          "type": "string",
          "format": "date-time",
          "description": "Timestamp when the failure occurred."
        }
      }
    },
    "WorkspaceEvent": {
      "type": "object",
      "description": "Webhook event for workspace-level notifications.",
      "required": ["event_type", "workspace_id"],
      "properties": {
        "event_type": {
          "type": "string",
          "const": "workspace_event",
          "description": "Event type identifier for workspace events."
        },
        "workspace_id": {
          "type": "string",
          "description": "Identifier of the workspace."
        },
        "data": {
          "type": "object",
          "description": "Event-specific data payload.",
          "additionalProperties": true
        }
      }
    },
    "TranscriptTurn": {
      "type": "object",
      "description": "A single turn in a conversation transcript.",
      "required": ["role", "message"],
      "properties": {
        "role": {
          "type": "string",
          "description": "The speaker role in the conversation.",
          "enum": ["agent", "user"]
        },
        "message": {
          "type": "string",
          "description": "The spoken message content."
        },
        "timestamp": {
          "type": "number",
          "description": "Timestamp in seconds from the start of the conversation."
        }
      }
    },
    "ConversationMetadata": {
      "type": "object",
      "description": "Metadata about a completed conversation.",
      "properties": {
        "duration_seconds": {
          "type": "number",
          "description": "Total duration of the conversation in seconds.",
          "minimum": 0
        },
        "started_at": {
          "type": "string",
          "format": "date-time",
          "description": "Timestamp when the conversation started."
        },
        "ended_at": {
          "type": "string",
          "format": "date-time",
          "description": "Timestamp when the conversation ended."
        },
        "end_reason": {
          "type": "string",
          "description": "The reason the conversation ended.",
          "enum": ["user_ended", "agent_ended", "timeout", "error"]
        }
      }
    }
  }
}