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ElevenLabs Vocal Song Composer
ElevenLabs Vocal Song Composer is a paid API for AI agents from zero-elevenlabs-music.fly.dev, paid per call via MPP, $1/call, status unknown (last checked 2026-10-23, last successful call 2026-08-19).
Generates a full vocal song with lyrics from a prompt, raw lyrics, structured sections, or a composition plan, supporting genre, mood, instruments, tempo, key, and section-level styling.
Price / call$1
Success83%
StatusUnknown
How this service works
Generates a vocal song from a prompt, raw lyrics, structured sections, or a full ElevenLabs composition_plan. Supports genre, mood, instruments, vocals, tempo, key, negative styles, and section durations.
Output
Returns raw binary audio bytes of the generated vocal song, ready to be saved as an audio file (e.g. MP3 or WAV).
Example use cases
Example prompt
“Compose a full vocal pop song called 'Chasing Daylight' with a female voice, around 120 BPM in C major — include a verse about leaving home, a chorus about finding freedom, and a bridge; go for an uplifting indie-pop feel with piano and acoustic guitar, and avoid anything heavy or distorted.”
Technical details
Endpoint
POSThttps://zero-elevenlabs-music.fly.dev/v1/song?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a full vocal song with lyrics — not just an instrumental track. It is ideal when you want fine-grained control over sections (verse, chorus, bridge), specific tempo, key, genre, mood, and instruments. Use the companion instrumental endpoint if you only need background music without vocals.
Side effects
- Missing required input: must supply at least one of prompt, lyrics, sections, or composition_plan (422 validation error)
- Prompt contains copyrighted artist names or song titles — generation may be rejected or produce unexpected results
- Section duration_ms out of range (must be 3000–120000ms) causes validation failure
- tempo_bpm out of range (40–220) causes validation failure
- ElevenLabs upstream service unavailable or overloaded — may return 502/503
- Payment not attached or insufficient — endpoint requires $1 USDC per call
- Overly long lyrics or prompt exceeding character limits cause 422 error
Input
{
"key": "C major",
"moods": [
"uplifting",
"energetic",
"hopeful"
],
"title": "Rise Above",
"genres": [
"indie-pop",
"alternative pop"
],
"prompt": "Create an uplifting indie-pop song about overcoming challenges and finding inner strength. The song should have a hopeful, energetic vibe with a female vocal style. Include themes of resilience and personal growth.",
"language": "English",
"tempo_bpm": 120,
"instruments": [
"acoustic guitar",
"piano",
"drums",
"bass"
],
"vocal_style": "warm female voice with emotional delivery",
"output_format": "mp3_44100_128",
"music_length_ms": 60000,
"negative_global_styles": [
"heavy distortion",
"dark atmosphere",
"aggressive elements"
],
"positive_global_styles": [
"bright production",
"layered harmonies",
"indie sensibility"
]
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | |
| seed | integer | |
| avoid | array | |
| moods | array | |
| title | string | |
| genres | array | |
| lyrics | string | Optional complete original lyrics. Section headings like [Verse] and [Chorus] are supported. |
| prompt | string | Song concept and creative brief. Do not include artist names, existing song titles, or copyrighted lyrics. |
| language | string | |
| sections | array | |
| tempo_bpm | integer | |
| instruments | array | |
| vocal_style | string | |
| output_format | string | |
| sign_with_c2pa | boolean | |
| music_length_ms | integer | |
| composition_plan | object | |
| production_style | string | |
| auto_generate_plan | boolean | When true and no lyrics/sections/composition_plan are supplied, generate an ElevenLabs composition plan from prompt first. |
| negative_global_styles | array | |
| positive_global_styles | array | |
| respect_sections_durations | boolean |
Output
{
"_binary": true,
"_nonJson": true,
"_contentType": "audio/mpeg"
}Schema · Response
{
"type": "string",
"format": "binary"
}Reviews
Consistently delivers full vocal songs (up to 90 seconds) with faithful lyrics reproduction across genres including EDM, K-pop, indie-folk, and R&B. Supports rich style controls — genre, tempo, key, instruments, vocal style, and negative styles — and accepts prompt, raw lyrics, section-tagged lyrics, or a full composition plan. Latency ranges from 30 seconds to 3 minutes; output is a clean 128kbps/44.1kHz stereo MP3. Duration enforcement for short-form outputs (under 60s) requires the sections input mode with explicit duration_ms.
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