openapi: 3.0.3
info:
  title: Telefon Voice API
  description: >-
    Programmable voice API for building call-based applications. Make outbound calls,
    handle inbound calls, build IVR menus, conference calls, and control calls in real-time.
    Supports SIP trunking, WebRTC, TTS, and call recording.
  version: v1
  contact:
    name: Telefon Support
    url: https://www.telefon.com/support
    email: api@telefon.com
  termsOfService: https://www.telefon.com/terms
servers:
  - url: https://api.telefon.com/v1/voice
    description: Telefon Voice API
security:
  - ApiKeyAuth: []
tags:
  - name: Calls
    description: Make and manage phone calls
  - name: Conferences
    description: Multi-party conferencing
paths:
  /calls:
    get:
      operationId: listCalls
      summary: List Calls
      description: Retrieve a paginated list of calls with filtering options.
      tags:
        - Calls
      parameters:
        - name: status
          in: query
          schema:
            type: string
            enum: [queued, ringing, in-progress, completed, failed, busy, no-answer, canceled]
          description: Filter by call status
        - name: direction
          in: query
          schema:
            type: string
            enum: [inbound, outbound]
          description: Filter by call direction
        - name: page
          in: query
          schema:
            type: integer
          description: Page number
        - name: page_size
          in: query
          schema:
            type: integer
            maximum: 100
          description: Results per page
      responses:
        '200':
          description: List of calls
          content:
            application/json:
              schema:
                type: object
                properties:
                  calls:
                    type: array
                    items:
                      $ref: '#/components/schemas/Call'
                  total:
                    type: integer
    post:
      operationId: createCall
      summary: Create Call
      description: Initiate an outbound voice call.
      tags:
        - Calls
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - to
                - from
              properties:
                to:
                  type: string
                  description: Destination phone number in E.164 format
                from:
                  type: string
                  description: Caller ID phone number (must be owned)
                url:
                  type: string
                  description: Webhook URL for call flow control
                status_callback:
                  type: string
                  description: URL to receive call status events
                timeout:
                  type: integer
                  default: 30
                  description: Seconds to wait for answer
                record:
                  type: boolean
                  description: Record the call automatically
      responses:
        '201':
          description: Call created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Call'
  /calls/{call_id}:
    get:
      operationId: getCall
      summary: Get Call
      description: Get details for a specific call by ID.
      tags:
        - Calls
      parameters:
        - name: call_id
          in: path
          required: true
          schema:
            type: string
          description: Unique call identifier
      responses:
        '200':
          description: Call details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Call'
        '404':
          description: Call not found
    delete:
      operationId: endCall
      summary: End Call
      description: Hang up an active call.
      tags:
        - Calls
      parameters:
        - name: call_id
          in: path
          required: true
          schema:
            type: string
          description: Unique call identifier
      responses:
        '204':
          description: Call ended
  /conferences:
    get:
      operationId: listConferences
      summary: List Conferences
      description: List conference calls.
      tags:
        - Conferences
      responses:
        '200':
          description: List of conferences
          content:
            application/json:
              schema:
                type: object
                properties:
                  conferences:
                    type: array
                    items:
                      $ref: '#/components/schemas/Conference'
    post:
      operationId: createConference
      summary: Create Conference
      description: Create a new conference room.
      tags:
        - Conferences
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                friendly_name:
                  type: string
                  description: Human-readable conference name
                max_participants:
                  type: integer
                  default: 250
                  description: Maximum number of participants
                record:
                  type: boolean
                  description: Auto-record the conference
      responses:
        '201':
          description: Conference created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Conference'
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
  schemas:
    Call:
      type: object
      required:
        - id
        - status
        - direction
        - from
        - to
      properties:
        id:
          type: string
          description: Unique call identifier
        status:
          type: string
          enum: [queued, ringing, in-progress, completed, failed, busy, no-answer, canceled]
          description: Current call status
        direction:
          type: string
          enum: [inbound, outbound]
          description: Call direction
        from:
          type: string
          description: Originating phone number (E.164)
        to:
          type: string
          description: Destination phone number (E.164)
        duration:
          type: integer
          description: Duration in seconds
        start_time:
          type: string
          format: date-time
          description: When the call started
        end_time:
          type: string
          format: date-time
          description: When the call ended
        price:
          type: string
          description: Cost of the call
        price_unit:
          type: string
          description: ISO 4217 currency code
    Conference:
      type: object
      required:
        - id
        - status
      properties:
        id:
          type: string
          description: Unique conference identifier
        friendly_name:
          type: string
          description: Conference name
        status:
          type: string
          enum: [init, in-progress, completed]
          description: Conference status
        participant_count:
          type: integer
          description: Current participant count
        date_created:
          type: string
          format: date-time
          description: Creation timestamp