Hailuo AI / MiniMax Music Generation API

openapi: 3.2.0
info:
  title: Hailuo AI / MiniMax Chat Completions Music Generation 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: Music Generation
  description: Vocal music generation from prompt and lyrics.
paths:
  /music_generation:
    post:
      operationId: createMusicGeneration
      tags:
      - Music Generation
      summary: Generate a vocal song (modeled)
      description: Generates a vocal song from a music-style description (prompt) plus lyrics. Endpoint path and payload are modeled from MiniMax's published music API; reconcile against the live reference.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MusicGenerationRequest'
      responses:
        '200':
          description: Generated audio (hex-encoded or a URL) plus metadata.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MusicGenerationResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    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
    MusicGenerationRequest:
      type: object
      required:
      - model
      - prompt
      - lyrics
      properties:
        model:
          type: string
          example: music-1.5
        prompt:
          type: string
          description: Music style / mood description.
          example: Upbeat synthwave with driving drums.
        lyrics:
          type: string
          description: Lyrics for the vocal track.
          example: '[verse] Neon lights over the city tonight'
        audio_setting:
          type: object
          properties:
            sample_rate:
              type: integer
              example: 44100
            bitrate:
              type: integer
              example: 256000
            format:
              type: string
              example: mp3
    MusicGenerationResponse:
      type: object
      properties:
        data:
          type: object
          properties:
            audio:
              type: string
              description: Hex-encoded audio bytes (or a URL).
        base_resp:
          $ref: '#/components/schemas/BaseResp'
  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}`.'