MiniMax Music 3

Endpoint

POST https://api.roasos.com/v1/music/minimax-music-3

Send your API key as a bearer token. The key needs the scope api:write. Every paid request also needs an Idempotency-Key header.

The envelope fields quote_only, quote_id, webhook_url and wait_timeout_seconds behave the same on each model endpoint. Refer to Jobs and Quotes and credits.

Good at

Score an ad with words you wrote. lyrics is required and is never written for you: putting words in your song is your decision, not the model's.

The price is $0.002 per second. duration_seconds is an UPPER BOUND, so the quote reserves the ceiling and settlement refunds whatever the model did not use. Ask for 60 seconds, get 41, and pay for 41. The settlement can only come down: a longer output settles at the ceiling you were quoted.

roasOS states no rights position on the music this model generates. Read the terms of the model and of fal before you publish a track.

Pricing

The unit is one second. Pricing key: minimax-music-3.

The credits come from the roasOS pricing table. No other field changes the price. To get the exact price of your request, send it with quote_only: true first.

Modes

• text-to-music

Provider endpoints: minimax/music-3.

Request fields

The schema is strict. A field that is not in this table gets 400 unsupported_option. The field names are the roasOS role names. One role has one name in every family.

Media

This endpoint accepts no media.

Every other role is refused: avatar_id, elements, product_id, product_images, references, reference_images, image_url, end_image_url, scene_id, scene_image, video_urls, video_url, audio_urls, audio_url, voice_id. A refused role gets 400 unsupported_option.

Prompt

Write a structured caption in the prompt: genre, BPM, key, emotional arc, then the vocal details and a section-by-section arrangement.

In lyrics, put every structure tag on its own line — [intro], [verse], [pre-chorus], [chorus], [bridge], [outro]. Text on the same line as a leading tag is dropped by the model.

Not exposed

These catalog entries describe omitted inputs, pinned values and source constraints. They do not imply that the provider accepts every listed field.

• num_inference_steps — not accepted by this public endpoint.
• guidance_scale — not accepted by this public endpoint.

Result

The result kind is audio. Always present: url. Present when the run makes it: timestamps.

{
  "data": {
    "id": "gen_…",
    "kind": "audio",
    "model": "minimax-music-3",
    "status": "completed",
    "result": {
      "timestamps": [
        {}
      ],
      "url": "https://cdn.roasos.com/workspaces/ws_01/result"
    }
  }
}

The files are immutable objects on https://cdn.roasos.com. A result URL is a valid media input for your next request.

Example

The three steps are always the same: quote, run, poll.

# 1. Quote. Nothing is spent.
curl -X POST https://api.roasos.com/v1/music/minimax-music-3 \
  -H "Authorization: Bearer roasos_sk_live_..." \
  -H "Idempotency-Key: 0f1c9e2a-minimax-music-3-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_only":true,"lyrics":"[verse]\nTwo drops in the morning\n[chorus]\nThat is the whole routine","prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera."}'
# 200 { "data": { "kind": "quote", "quote_id": "q_7Hk...", "credits": 1, "expires_at": "...",
#        "confirmation": { "model": "minimax-music-3", "example": "30s" } } }

# 2. Run. Same body, same Idempotency-Key, quote_id in place of quote_only.
curl -X POST https://api.roasos.com/v1/music/minimax-music-3 \
  -H "Authorization: Bearer roasos_sk_live_..." \
  -H "Idempotency-Key: 0f1c9e2a-minimax-music-3-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_id":"q_7Hk...","lyrics":"[verse]\nTwo drops in the morning\n[chorus]\nThat is the whole routine","prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera."}'
# 201 { "data": { "id": "gen_...", "status": "queued", "credits_reserved": 1 } }

# 3. Poll, then read the result.
curl https://api.roasos.com/v1/jobs/gen_.../status -H "Authorization: Bearer roasos_sk_live_..."
curl https://api.roasos.com/v1/jobs/gen_.../result -H "Authorization: Bearer roasos_sk_live_..."

Today

The endpoint is POST /v1/music/minimax-music-3.

It is live.

See also

• llms.txt for this model — the same facts as one plain-text file for an agent.
• GET https://api.roasos.com/v1/catalog/minimax-music-3 — the machine-readable form: enums, defaults, limits and prices. Refer to the API reference.
• Jobs — how to poll a job and read its result.
• Provider endpoints: minimax/music-3.