Hailuo AI / MiniMax Text to Speech API

openapi: 3.0.3
info:
  title: Hailuo AI / MiniMax Chat Completions Text to Speech API
  description: 'Documented HTTP APIs for MiniMax''s Hailuo generative video and audio platform. The primary surface is AI video generation (Hailuo models), which follows an asynchronous three-step pattern: create a task (POST /video_generation) to receive a task_id, poll status (GET /query/video_generation) until it returns a file_id, then retrieve the file (GET /files/retrieve) to obtain a temporary download URL for the finished MP4. The same platform also serves text-to-speech (T2A), OpenAI-compatible chat completions, and music generation. All endpoints authenticate with a Bearer API key from the MiniMax console.

    Video generation endpoints, methods, the async task/query/retrieve flow, model names, and core parameters are grounded in MiniMax''s published documentation. Request and response schemas are modeled to reflect the documented fields; treat exact field-level shapes as approximate and reconcile against the live API reference. The text-to-speech, chat-completions, and music-generation request bodies are modeled representative payloads.'
  version: '1.0'
  contact:
    name: MiniMax
    url: https://platform.minimax.io
  x-endpointsModeled: true
  x-endpointsModeledNote: Video generation, query, and file-retrieve endpoints, HTTP methods, model names, and the async workflow are confirmed from live MiniMax docs. Detailed JSON schemas, and the music-generation endpoint payload, are honestly modeled and should be reconciled against the official reference before production use.
servers:
- url: https://api.minimax.io/v1
  description: MiniMax International (global)
- url: https://api-uw.minimax.io/v1
  description: MiniMax International - US West (lower time-to-first-audio for T2A)
- url: https://api.minimaxi.chat/v1
  description: MiniMax Mainland China
security:
- bearerAuth: []
tags:
- name: Text to Speech
  description: Speech synthesis (T2A v2).
paths:
  /t2a_v2:
    post:
      operationId: createSpeech
      tags:
      - Text to Speech
      summary: Synthesize speech (T2A v2)
      description: Synchronous text-to-speech over HTTP using the speech-2.8 / speech-2.6 / speech-02 / speech-01 HD or turbo models. Text must be under 10,000 characters. A real-time WebSocket variant is documented separately at wss://api.minimax.io/ws/v1/t2a_v2 (see the AsyncAPI document).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/T2ARequest'
      responses:
        '200':
          description: Synthesized audio (hex-encoded or a URL) plus metadata.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/T2AResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    T2AResponse:
      type: object
      properties:
        data:
          type: object
          properties:
            audio:
              type: string
              description: Hex-encoded audio bytes (or a URL, per audio settings).
            status:
              type: integer
        extra_info:
          type: object
        base_resp:
          $ref: '#/components/schemas/BaseResp'
    T2ARequest:
      type: object
      required:
      - model
      - text
      properties:
        model:
          type: string
          enum:
          - speech-2.8-hd
          - speech-2.8-turbo
          - speech-2.6-hd
          - speech-2.6-turbo
          - speech-02-hd
          - speech-02-turbo
          - speech-01-hd
          - speech-01-turbo
          example: speech-2.6-hd
        text:
          type: string
          description: Text to synthesize; must be under 10,000 characters.
          example: Welcome to the API Evangelist network.
        stream:
          type: boolean
          example: false
        voice_setting:
          type: object
          properties:
            voice_id:
              type: string
              example: male-qn-qingse
            speed:
              type: number
              example: 1.0
            vol:
              type: number
              example: 1.0
            pitch:
              type: integer
              example: 0
        audio_setting:
          type: object
          properties:
            sample_rate:
              type: integer
              example: 32000
            bitrate:
              type: integer
              example: 128000
            format:
              type: string
              example: mp3
    BaseResp:
      type: object
      description: Standard MiniMax response status wrapper.
      properties:
        status_code:
          type: integer
          description: 0 indicates success; non-zero indicates an error.
          example: 0
        status_msg:
          type: string
          example: success
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/BaseResp'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Bearer API key created in the MiniMax platform console under Account Management > API Keys. Passed as `Authorization: Bearer {api_key}`.'