ElevenLabs Music

Endpoint

POST https://api.roasos.com/v1/music/elevenlabs-music

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

Make a music bed that ends with the ad. Set duration_seconds to the length of the cut (3 to 600 seconds, whole seconds) and the track runs to that length. A 15-second ad gets a 15-second bed.

instrumental is true by default, so the track has no vocals. Set it to false when the prompt asks for a voice.

The price is $0.60 per started minute of output. The length is always sent, so a request for 15, 30 or 60 seconds costs one minute, and a request for 61 to 120 seconds costs two. When you do not send duration_seconds, roasOS sends 120 seconds and charges two minutes. It never lets the model pick a length with no limit. The output reports no duration, so the quote is exact and nothing reconciles.

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 minute. Pricing key: elevenlabs-music.

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: elevenlabs/music/v2.5.

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 short brief: the genre, the mood, the tempo in BPM, the lead instruments and the energy arc. Say what the track is for ("a background bed for a product ad, with room for a voice"), so the mix stays under the speech.

Do not write the length in the prompt. duration_seconds sets it.

Example: "Warm modern lo-fi bed for a skincare ad, 85 BPM, soft keys, light vinyl texture and a brushed kick; a steady groove that leaves room for a voice, a gentle build and a clean ending."

Not exposed

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

• composition_plan — not accepted by this public endpoint.
• seed — not accepted by this public endpoint.
• output_format — 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": "elevenlabs-music",
    "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/elevenlabs-music \
  -H "Authorization: Bearer roasos_sk_live_..." \
  -H "Idempotency-Key: 0f1c9e2a-elevenlabs-music-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_only":true,"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": 8, "expires_at": "...",
#        "confirmation": { "model": "elevenlabs-music", "example": "15s" } } }

# 2. Run. Same body, same Idempotency-Key, quote_id in place of quote_only.
curl -X POST https://api.roasos.com/v1/music/elevenlabs-music \
  -H "Authorization: Bearer roasos_sk_live_..." \
  -H "Idempotency-Key: 0f1c9e2a-elevenlabs-music-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_id":"q_7Hk...","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": 8 } }

# 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/elevenlabs-music. It runs fal elevenlabs/music/v2.5.

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/elevenlabs-music — 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: elevenlabs/music/v2.5.