Layercode Sessions API

openapi: 3.0.1
info:
  title: Layercode REST Agents Sessions API
  description: REST API for the Layercode voice-AI agent platform. Manage agents (voice pipelines), authorize browser client sessions, retrieve session detail and recordings, and initiate outbound phone calls. All requests are authenticated with an org-scoped API key passed as a Bearer token.
  termsOfService: https://layercode.com/terms
  contact:
    name: Layercode Support
    url: https://docs.layercode.com
  version: '1.0'
servers:
- url: https://api.layercode.com/v1
security:
- bearerAuth: []
tags:
- name: Sessions
paths:
  /agents/web/authorize_session:
    post:
      operationId: authorizeSession
      tags:
      - Sessions
      summary: Authorize a browser client session
      description: Called from your backend with an agent_id and your org-scoped API key. Returns a short-lived client_session_key the browser uses to open the realtime WebSocket, plus the conversation_id.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AuthorizeSessionRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AuthorizeSessionResponse'
  /agents/{agent_id}/sessions/{session_id}:
    get:
      operationId: getSession
      tags:
      - Sessions
      summary: Get session detail
      description: Returns metadata, transcript, duration, and recording status for a single conversation session handled by the agent.
      parameters:
      - $ref: '#/components/parameters/AgentId'
      - $ref: '#/components/parameters/SessionId'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Session'
  /agents/{agent_id}/sessions/{session_id}/recording:
    get:
      operationId: getSessionRecording
      tags:
      - Sessions
      summary: Download session recording
      description: Returns the WAV audio recording for the session, when available.
      parameters:
      - $ref: '#/components/parameters/AgentId'
      - $ref: '#/components/parameters/SessionId'
      responses:
        '200':
          description: OK
          content:
            audio/wav:
              schema:
                type: string
                format: binary
components:
  schemas:
    AuthorizeSessionRequest:
      type: object
      required:
      - agent_id
      properties:
        agent_id:
          type: string
        conversation_id:
          type: string
          description: Optional existing conversation to resume.
        config:
          type: object
          description: Optional per-session overrides.
          additionalProperties: true
    TranscriptEntry:
      type: object
      properties:
        role:
          type: string
          enum:
          - user
          - assistant
        text:
          type: string
        timestamp:
          type: string
          format: date-time
    Session:
      type: object
      properties:
        session_id:
          type: string
        agent_id:
          type: string
        conversation_id:
          type: string
        started_at:
          type: string
          format: date-time
        ended_at:
          type: string
          format: date-time
        duration_ms:
          type: integer
        metadata:
          type: object
          additionalProperties: true
        from_phone_number:
          type: string
        to_phone_number:
          type: string
        transcript:
          type: array
          items:
            $ref: '#/components/schemas/TranscriptEntry'
        recording_status:
          type: string
        recording_url:
          type: string
    AuthorizeSessionResponse:
      type: object
      properties:
        client_session_key:
          type: string
          description: Short-lived key the browser uses to open the WebSocket.
        conversation_id:
          type: string
        config:
          type: object
          additionalProperties: true
  parameters:
    SessionId:
      name: session_id
      in: path
      required: true
      description: The unique identifier of the session (conversation).
      schema:
        type: string
    AgentId:
      name: agent_id
      in: path
      required: true
      description: The unique identifier of the agent.
      schema:
        type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Org-scoped Layercode API key passed as a Bearer token.