KugelAudio Vapi API

openapi: 3.1.0
info:
  title: KugelAudio TTS 11labs Vapi API
  description: 'Unified API: REST + WebSocket + ElevenLabs + Vapi'
  version: 2.0.0
tags:
- name: Vapi
paths:
  /vapi/synthesize:
    post:
      summary: Vapi Synthesize
      description: 'Vapi custom TTS webhook.


        With ``message.call.id``: clause POSTs of one agent turn share a

        TTS session (KV continuation). Without it (test harness, non-Vapi

        callers): a stateless one-shot synthesis.'
      operationId: vapi_synthesize_vapi_synthesize_post
      parameters:
      - name: voice_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Voice Id
      - name: model_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Model Id
      - name: x-voice-id
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: X-Voice-Id
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/VapiTTSRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Vapi
components:
  schemas:
    VapiTTSRequest:
      properties:
        message:
          $ref: '#/components/schemas/VapiMessage'
      type: object
      required:
      - message
      title: VapiTTSRequest
      description: Vapi custom TTS webhook request body.
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    VapiArtifact:
      properties:
        messages:
          items: {}
          type: array
          title: Messages
      type: object
      title: VapiArtifact
      description: 'Subset of Vapi''s ``artifact`` — only the transcript length.


        ``len(messages)`` is the turn id: stable across POSTs of one agent

        turn, grows between turns. Items are never introspected.'
    VapiCall:
      properties:
        id:
          type: string
          minLength: 1
          title: Id
        orgId:
          anyOf:
          - type: string
          - type: 'null'
          title: Orgid
      type: object
      required:
      - id
      title: VapiCall
      description: Subset of Vapi's ``call`` object — only the stable id.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    VapiMessage:
      properties:
        type:
          type: string
          title: Type
          default: voice-request
        text:
          type: string
          maxLength: 10000
          minLength: 1
          title: Text
        sampleRate:
          type: integer
          title: Samplerate
          description: Target sample rate in Hz
        call:
          anyOf:
          - $ref: '#/components/schemas/VapiCall'
          - type: 'null'
        artifact:
          anyOf:
          - $ref: '#/components/schemas/VapiArtifact'
          - type: 'null'
      type: object
      required:
      - text
      - sampleRate
      title: VapiMessage
      description: The ``message`` object Vapi sends in every custom TTS webhook.