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OpenAPI Specification

openapi: 3.2.0
info:
  title: WanAPIs Unified AI Audio API
  version: '2026-05-27'
  summary: OpenAI-compatible AI gateway aggregating GPT, Claude, Gemini, DeepSeek and other LLM, image, video, and audio model providers behind a single key.
  description: 'WanAPIs (https://wanapis.com) is a developer-focused AI API gateway. Clients

    issue OpenAI-style requests against `https://api.wanapis.com/v1`; the

    platform routes them to the appropriate upstream model provider (OpenAI,

    Anthropic, Google, DeepSeek, Moonshot, Alibaba, xAI, Mistral, Stability,

    Midjourney, etc.) and applies per-project quota, metering, channel

    routing, and failover.


    This OpenAPI is **hand-authored** by API Evangelist. WanAPIs publishes no

    machine-readable spec — `https://api.wanapis.com/openapi.json` returns the

    admin dashboard. Operations included here are taken from

    https://wanapis.com/docs and https://wanapis.com/pricing and reflect the

    OpenAI-compatible surface plus the documented WanAPIs `/responses` and

    async task patterns. Request and response schemas mirror the OpenAI HTTP

    API by convention; consult the upstream OpenAI reference for full field

    semantics.

    '
  termsOfService: https://wanapis.com/
  contact:
    name: WanAPIs Support
    email: support@wanapis.com
    url: https://wanapis.com/
  license:
    name: Proprietary
    url: https://wanapis.com/
servers:
- url: https://api.wanapis.com/v1
  description: WanAPIs production OpenAI-compatible base URL.
security:
- bearerAuth: []
tags:
- name: Audio
  description: Text-to-speech, transcription, and translation.
paths:
  /audio/speech:
    post:
      tags:
      - Audio
      operationId: createSpeech
      summary: Synthesize speech from text
      description: OpenAI-compatible TTS endpoint. Returns binary audio.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpeechRequest'
      responses:
        '200':
          description: Audio bytes.
          content:
            audio/mpeg:
              schema:
                type: string
                format: binary
            audio/wav:
              schema:
                type: string
                format: binary
            audio/opus:
              schema:
                type: string
                format: binary
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/UpstreamFailure'
  /audio/transcriptions:
    post:
      tags:
      - Audio
      operationId: createTranscription
      summary: Transcribe audio to text
      description: OpenAI-compatible audio transcription (e.g. Whisper-class models). Multipart form upload.
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/TranscriptionRequest'
      responses:
        '200':
          description: Transcription result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TranscriptionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/UpstreamFailure'
  /audio/translations:
    post:
      tags:
      - Audio
      operationId: createTranslation
      summary: Translate audio to English text
      description: OpenAI-compatible audio translation. Multipart form upload.
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/TranscriptionRequest'
      responses:
        '200':
          description: Translation result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TranscriptionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/UpstreamFailure'
components:
  schemas:
    SpeechRequest:
      type: object
      required:
      - model
      - input
      - voice
      properties:
        model:
          type: string
        input:
          type: string
        voice:
          type: string
        response_format:
          type: string
          enum:
          - mp3
          - opus
          - aac
          - flac
          - wav
          - pcm
          default: mp3
        speed:
          type: number
    TranscriptionResponse:
      type: object
      properties:
        text:
          type: string
        language:
          type: string
        duration:
          type: number
        segments:
          type: array
          items:
            type: object
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string
            param:
              type: string
              nullable: true
    TranscriptionRequest:
      type: object
      required:
      - model
      - file
      properties:
        model:
          type: string
        file:
          type: string
          format: binary
        language:
          type: string
        prompt:
          type: string
        response_format:
          type: string
          enum:
          - json
          - text
          - srt
          - verbose_json
          - vtt
        temperature:
          type: number
  responses:
    RateLimited:
      description: Rate limit or quota exceeded.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    UpstreamFailure:
      description: Upstream provider failure (500–504). Retry with exponential backoff; WanAPIs may auto-failover to a configured channel.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: 'Authenticate every request with `Authorization: Bearer <wanapis_api_key>`.

        Keys are issued per project in the WanAPIs dashboard and may be scoped

        with quota and model availability.

        '