openapi: 3.1.0
info:
  title: CometAPI Unified Audio API
  description: CometAPI is an OpenAI-compatible aggregator that exposes a single REST surface for 500+ AI models from multiple vendors (OpenAI, Anthropic, Google, xAI, DeepSeek, Alibaba, and more). Endpoints follow OpenAI's request/response shapes for chat, embeddings, images, video, and speech, so existing OpenAI SDK clients can switch by changing only the base URL and API key.
  version: 1.0.0
  contact:
    name: CometAPI
    url: https://www.cometapi.com/
servers:
- url: https://api.cometapi.com/v1
  description: Production
security:
- bearerAuth: []
tags:
- name: Audio
  description: Speech synthesis, transcription, and translation.
paths:
  /audio/speech:
    post:
      operationId: createSpeech
      summary: Create speech
      description: Synthesize speech audio from text (TTS).
      tags:
      - Audio
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - model
              - input
              properties:
                model:
                  type: string
                input:
                  type: string
                voice:
                  type: string
                response_format:
                  type: string
      responses:
        '200':
          description: Audio bytes.
  /audio/transcriptions:
    post:
      operationId: createTranscription
      summary: Transcribe audio
      description: Transcribe an audio file to text using Whisper-class models.
      tags:
      - Audio
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                file:
                  type: string
                  format: binary
                model:
                  type: string
                language:
                  type: string
      responses:
        '200':
          description: Transcript.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
externalDocs:
  description: CometAPI Documentation
  url: https://apidoc.cometapi.com/