# ElevenLabs Instrumental Background Music Generator

> ElevenLabs Instrumental Background Music Generator is a paid API for AI agents from zero-elevenlabs-music.fly.dev, paid per call via MPP, $0.5/call, status healthy (last checked 2026-10-22, last successful call 2026-10-20).

Generates an instrumental background music track from a text prompt using ElevenLabs Music, returning raw audio bytes.

## Facts

- Endpoint: POST https://zero-elevenlabs-music.fly.dev/v1/music?utm_source=zero.xyz
- Price: $0.5/call
- Payment: MPP
- Status: healthy
- Last checked: 2026-10-22
- Last successful call: 2026-10-20
- Success rate: 78% of calls made through Zero
- Rating: 3.6 / 5 from 13 reviews
- Activations on Zero: 114
- Provider: zero-elevenlabs-music.fly.dev
- Website: https://zero-elevenlabs-music.fly.dev
- Canonical page: https://www.zero.xyz/c/zero-elevenlabs-music-fly-dev-elevenlabs-instrumental-background-1028c173
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K0SUN6u-WlNCpgt5pe-fR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability zero-elevenlabs-music-fly-dev-elevenlabs-instrumental-background-1028c173 -d '<json body>'
```

Example prompt: Compose a 30-second instrumental lo-fi hip-hop background track with a relaxed, chill vibe — no vocals — and give me the MP3 audio file.

## When to prefer this

Use this endpoint when you need a pure instrumental background music track (no vocals) generated from a natural language description, especially for background audio in videos, podcasts, apps, or presentations. Prefer this over the vocal/song endpoint when you explicitly do not want lyrics or singing.

## Known failure modes

- Prompt includes artist names, song titles, or copyrighted lyrics — rejected by ElevenLabs
- music_length_ms out of range (below 3000 or above 90000 ms) — validation error
- Prompt is empty or exceeds 4100 characters — request rejected
- Upstream ElevenLabs API unavailable — 502 or 503 error
- Payment not completed or insufficient USDC balance — payment required error

## How this service works

Compose an instrumental background music track with ElevenLabs Music and return audio bytes.

## Output

Raw binary audio bytes (MP3 by default at 44100 Hz, 128 kbps) of the generated instrumental music track, ready for download or playback.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "prompt"
 ],
 "properties": {
  "seed": {
   "type": "integer",
   "maximum": 2147483647,
   "minimum": 0
  },
  "prompt": {
   "type": "string",
   "maxLength": 4100,
   "minLength": 1,
   "description": "Text prompt for ElevenLabs Music. Do not include artist names, song titles, or copyrighted lyrics."
  },
  "output_format": {
   "type": "string",
   "default": "mp3_44100_128",
   "description": "ElevenLabs output format, for example mp3_44100_128."
  },
  "sign_with_c2pa": {
   "type": "boolean",
   "default": false
  },
  "music_length_ms": {
   "type": "integer",
   "default": 30000,
   "maximum": 90000,
   "minimum": 3000,
   "description": "Generated track length in milliseconds."
  },
  "force_instrumental": {
   "type": "boolean",
   "default": true,
   "description": "Force an instrumental track for background music use cases."
  }
 },
 "additionalProperties": false
}
```

## Response schema (JSON Schema)

```json
{
 "type": "string",
 "format": "binary"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zero-elevenlabs-music-fly-dev-elevenlabs-instrumental-background-1028c173/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from zero-elevenlabs-music.fly.dev](https://www.zero.xyz/host/zero-elevenlabs-music.fly.dev/llms.txt)