Registry indexed
Generate music from a text prompt using Sonilo — instrumental tracks, background beds, jingles, loops — when there is no video to score. Use when the user describes the music they want in words and gives a duration. Every track is licensed and cleared for commercial use. For scor
Generate music from a text prompt using Sonilo — instrumental tracks, background beds, jingles, loops — when there is no video to score. Use when the user describes the music they want in words and gives a duration. Every track is licensed and cleared for commercial use. For scoring an existing video, use the video-to-music skill instead.
Source documentation, not instructions for this website. Review permissions before running any commands.
Generate music from a text description alone — no video involved. The prompt IS the input, so the brief carries everything: genre, mood, energy arc, instrumentation, and what must not appear. Every track is licensed (music licensed via Shutterstock) and cleared for commercial use on social, brand content, and advertising.
Setup: See the setup-api-key skill to connect the Sonilo MCP server and authenticate —
sonilo login(no key) orSONILO_API_KEY.
⚠️ Cost: this tool makes an API call that may incur charges. Only call it when the user has actually asked for a generation. Check
get_account_services(see the account skill) if you're unsure whether free-trial runs remain.
Scoring a video instead? Use video-to-music — it matches pacing, motion, and emotion to the actual cut, which a text prompt cannot do.
Pick one at the start of the session and stay on it. Do not mix the two inside a single job, and do not announce the choice.
text_to_music and friends) — use them. This is the preferred path: it needs no shell, and it is the only one that survives a very long generation. If a call fails to authenticate — rather than failing on its inputs — this transport is not usable in this session: go to 2 instead of retrying it.sonilo account exits 0 — use the CLI commands below. Same API, same account, same credential file. Probe with sonilo account, not sonilo whoami: whoami exits 0 even when signed out, so it cannot tell the two states apart.api.sonilo.com with curl to work around it; both transports handle uploads, polling and retries that a bare request does not.text_to_music(
prompt="A chill lo-fi hip hop beat with jazzy piano chords",
duration=30
)
Saves the generated file(s) to SONILO_MCP_BASE_PATH (~/Desktop by default) and returns the saved path(s) as text.
pip install sonilo)from sonilo import Sonilo
client = Sonilo() # reads SONILO_API_KEY
track = client.text_to_music.generate(prompt="A chill lo-fi hip hop beat with jazzy piano chords", duration=30)
track.save("output.mp3")
npm install sonilo)import { SoniloClient } from "sonilo";
const client = new SoniloClient(); // reads SONILO_API_KEY
const track = await client.textToMusic.generate({
prompt: "A chill lo-fi hip hop beat with jazzy piano chords",
duration: 30,
});
npm install -g sonilo-cli or pip install sonilo-cli)sonilo text-to-music --prompt "A chill lo-fi hip hop beat with jazzy piano chords" --duration 30
curl -X POST "https://api.sonilo.com/v1/text-to-music" \
-H "Authorization: Bearer $SONILO_API_KEY" \
--data-urlencode "prompt=A chill lo-fi hip hop beat with jazzy piano chords" \
--data-urlencode "duration=30" \
--output output.m4a
| Tool | Description |
|---|---|
text_to_music(prompt, duration, output_format?, variants_num?, stems?, output_directory?) | Generate music from a text description only — no video. |
| Parameter | Type | Default | Notes |
|---|---|---|---|
prompt | string | — | Required. 1–1000 chars. |
duration | int | — | Required. 1–360 seconds. Unlike the video tools, there is no source to take the length from, so you must set it. |
variants_num | int | 1 | 1–10. Generates that many distinct creative directions in one request — different takes, not re-renders of one. Cost scales linearly with the count, and any value above 1 is never covered by the free trial, so confirm the number with the user first. Above 1 writes one file per variant and forces the backend's async mode. |
output_format | string | m4a | m4a or wav. wav triggers the backend's async mode internally — no user-facing "mode" param needed. |
stems | bool | false | Free. Additionally splits each generated track into four separated instrument tracks — drums, bass, vocals, other — returned alongside the untouched full mix. Async-only on REST (stems=true without mode=async is a 400). See Stems. |
output_directory | string | SONILO_MCP_BASE_PATH | Absolute, or relative to the base path. |
stems=true additionally returns each generated track split into four
separated instrument tracks — drums, bass, vocals, other — free of
charge. The full mix is untouched; the stems arrive alongside it in the task
result as a stems array next to audio:
"stems": [
{
"stream_index": 0,
"drums": { "url": "…", "content_type": "audio/mp4", "file_size": 2913044 },
"bass": { "url": "…", "content_type": "audio/mp4", "file_size": 2870211 },
"vocals": { "url": "…", "content_type": "audio/mp4", "file_size": 2794560 },
"other": { "url": "…", "content_type": "audio/mp4", "file_size": 3011830 }
}
]
What matters when you use it:
stems=true requires mode=async (a 400 otherwise): you get a 202 + task_id and poll /v1/tasks/{task_id}. The MCP tools are always async, so on the hosted server the param just works.sonilo-mcp package (>= 0.18.0), the SDKs (sonilo npm >= 0.16.0, PyPI >= 0.15.0), and the CLIs (--stems, npm sonilo-cli >= 0.15.0, PyPI sonilo-cli >= 0.14.0).stream_index, never by array position. A stream whose separation failed is simply absent, so stems can be shorter than audio.stems_error is not a failed generation. When separation failed wholly or partly, or was skipped, the task carries a stems_error string — possibly alongside a partial stems array. The generation itself succeeded and every audio URL is valid: treat missing stems as a missing extra, never as a reason to retry or refund.stems_error).other, and on instrumental tracks vocals is near-silent. That is correct behavior, not a bug.output_format; trust each stem's content_type for what was actually delivered.# REST: submit with stems, then poll the task
curl -X POST "https://api.sonilo.com/v1/text-to-music" \
-H "Authorization: Bearer $SONILO_API_KEY" \
--data-urlencode "prompt=A chill lo-fi hip hop beat with jazzy piano chords" \
--data-urlencode "duration=30" \
--data-urlencode "mode=async" \
--data-urlencode "stems=true"
# → {"task_id": "…"} — poll GET /v1/tasks/{task_id} for audio + stems
The prompt is the only input — there is no footage to lean on. Describe genre, mood, tempo, instrumentation, and the energy arc; "A driving synthwave track with arpeggiated leads" beats "electronic music." Describe structure in words too ("builds for 10 s, drops, outro"), since there is no cut to infer it from. Name exclusions explicitly — the sounds that must not appear.
The same craft vocabulary applies as for video scoring, minus the video pre-flight: references/music-prompting.md.
Generate once and iterate on the prompt, not on rerolls — failed runs auto-refund, but your own retry is a new charge.
variants_num=3 returns three distinct directions for one request instead of three re-rolls. It costs 3×, and it is never free-trial covered — say the price before calling.stems=true — it's free, but async-only and not on every surface yet; see Stems.text_to_music streams its result in one call unless output_format="wav",
variants_num above 1, or stems=true triggers the backend's async mode. If an async variant
times out, the error message includes a task_id; the generation keeps running
(and is already charged) on the backend. Call get_sfx_task(task_id) —
get_generation_task(task_id) on the hosted server — to retrieve the result;
see the task-recovery skill.
.m4a by default (.wav if requested), named from the prompt (slugified) or sonilo-<timestamp>.m4a. Multiple parallel streams get a -<index> suffix.
Common errors: 401 invalid key, 402 insufficient balance / trial exhausted, 422 invalid parameters (e.g. duration out of range), 429 rate limit. See the account skill to check trial/usage before a call.
name: text-to-music description: Generate music from a text prompt using Sonilo — instrumental tracks, background beds, jingles, loops — when there is no video to score. Use when the user describes the music they want in words and gives a duration. Every track is licensed and cleared for commercial use. For scoring an existing video, use the video-to-music skill instead. license: MIT compatibility: "Requires Sonilo through either transport — the MCP server connected, or the `sonilo` CLI installed and signed in — plus credentials: a `sonilo login` sign-in, the hosted OAuth plugin, or SONILO_API_KEY. See the setup-api-key skill." allowed-tools: Bash, Read, Write, mcp__sonilo__*
---
name: text-to-music
description: Generate music from a text prompt using Sonilo — instrumental tracks, background beds, jingles, loops — when there is no video to score. Use when the user describes the music they want in words and gives a duration. Every track is licensed and cleared for commercial use. For scoring an existing video, use the video-to-music skill instead.
license: MIT
compatibility: "Requires Sonilo through either transport — the MCP server connected, or the `sonilo` CLI installed and signed in — plus credentials: a `sonilo login` sign-in, the hosted OAuth plugin, or SONILO_API_KEY. See the setup-api-key skill."
allowed-tools: Bash, Read, Write, mcp__sonilo__*
---
# Sonilo Text-to-Music
Generate music from a text description alone — no video involved. The prompt IS
the input, so the brief carries everything: genre, mood, energy arc,
instrumentation, and what must not appear. Every track is licensed (music
licensed via Shutterstock) and cleared for commercial use on social, brand
content, and advertising.
> **Setup:** See the [setup-api-key](../setup-api-key) skill to connect the Sonilo MCP server and authenticate — `sonilo login` (no key) or `SONILO_API_KEY`.
> ⚠️ **Cost:** this tool makes an API call that may incur charges. Only call it when the user has actually asked for a generation. Check `get_account_services` (see the [account](../account) skill) if you're unsure whether free-trial runs remain.
> **Scoring a video instead?** Use [video-to-music](../video-to-music) — it matches pacing, motion, and emotion to the actual cut, which a text prompt cannot do.
## Transport: MCP or CLI
Pick one at the start of the session and stay on it. Do not mix the two inside
a single job, and do not announce the choice.
1. **Sonilo MCP tools visible in this session** (`text_to_music` and friends) — use them. This is the preferred path: it needs no shell, and it is the only one that survives a very long generation. If a call fails to authenticate — rather than failing on its inputs — this transport is not usable in this session: go to 2 instead of retrying it.
2. **No usable Sonilo MCP tools, but `sonilo account` exits 0** — use the CLI commands below. Same API, same account, same credential file. Probe with `sonilo account`, not `sonilo whoami`: whoami exits 0 even when signed out, so it cannot tell the two states apart.
3. **Neither** — stop and run the [setup-api-key](../setup-api-key) skill. Do not call `api.sonilo.com` with curl to work around it; both transports handle uploads, polling and retries that a bare request does not.
## Quick Start
### MCP tool call (recommended)
```
text_to_music(
prompt="A chill lo-fi hip hop beat with jazzy piano chords",
duration=30
)
```
Saves the generated file(s) to `SONILO_MCP_BASE_PATH` (`~/Desktop` by default) and returns the saved path(s) as text.
### Python (`pip install sonilo`)
```python
from sonilo import Sonilo
client = Sonilo() # reads SONILO_API_KEY
track = client.text_to_music.generate(prompt="A chill lo-fi hip hop beat with jazzy piano chords", duration=30)
track.save("output.mp3")
```
### JavaScript / TypeScript (`npm install sonilo`)
```ts
import { SoniloClient } from "sonilo";
const client = new SoniloClient(); // reads SONILO_API_KEY
const track = await client.textToMusic.generate({
prompt: "A chill lo-fi hip hop beat with jazzy piano chords",
duration: 30,
});
```
### CLI (`npm install -g sonilo-cli` or `pip install sonilo-cli`)
```bash
sonilo text-to-music --prompt "A chill lo-fi hip hop beat with jazzy piano chords" --duration 30
```
### cURL (raw REST API, no MCP host)
```bash
curl -X POST "https://api.sonilo.com/v1/text-to-music" \
-H "Authorization: Bearer $SONILO_API_KEY" \
--data-urlencode "prompt=A chill lo-fi hip hop beat with jazzy piano chords" \
--data-urlencode "duration=30" \
--output output.m4a
```
## Tool
| Tool | Description |
|------|-------------|
| `text_to_music(prompt, duration, output_format?, variants_num?, stems?, output_directory?)` | Generate music from a text description only — no video. |
## Parameters
| Parameter | Type | Default | Notes |
|-----------|------|---------|-------|
| `prompt` | string | — | Required. 1–1000 chars. |
| `duration` | int | — | Required. 1–360 seconds. Unlike the video tools, there is no source to take the length from, so you must set it. |
| `variants_num` | int | `1` | 1–10. Generates that many distinct creative directions in one request — different takes, not re-renders of one. **Cost scales linearly with the count, and any value above 1 is never covered by the free trial**, so confirm the number with the user first. Above 1 writes one file per variant and forces the backend's async mode. |
| `output_format` | string | `m4a` | `m4a` or `wav`. `wav` triggers the backend's async mode internally — no user-facing "mode" param needed. |
| `stems` | bool | `false` | **Free.** Additionally splits each generated track into four separated instrument tracks — `drums`, `bass`, `vocals`, `other` — returned alongside the untouched full mix. Async-only on REST (`stems=true` without `mode=async` is a `400`). See [Stems](#stems). |
| `output_directory` | string | `SONILO_MCP_BASE_PATH` | Absolute, or relative to the base path. |
## Stems
`stems=true` additionally returns each generated track split into four
separated instrument tracks — `drums`, `bass`, `vocals`, `other` — **free of
charge**. The full mix is untouched; the stems arrive alongside it in the task
result as a `stems` array next to `audio`:
```json
"stems": [
{
"stream_index": 0,
"drums": { "url": "…", "content_type": "audio/mp4", "file_size": 2913044 },
"bass": { "url": "…", "content_type": "audio/mp4", "file_size": 2870211 },
"vocals": { "url": "…", "content_type": "audio/mp4", "file_size": 2794560 },
"other": { "url": "…", "content_type": "audio/mp4", "file_size": 3011830 }
}
]
```
What matters when you use it:
- **Async only on REST.** `stems=true` requires `mode=async` (a `400` otherwise): you get a `202` + `task_id` and poll `/v1/tasks/{task_id}`. The MCP tools are always async, so on the hosted server the param just works.
- **Available on every surface** (verified 2026-08-17): REST, the hosted MCP server, the local `sonilo-mcp` package (>= 0.18.0), the SDKs (`sonilo` npm >= 0.16.0, PyPI >= 0.15.0), and the CLIs (`--stems`, npm `sonilo-cli` >= 0.15.0, PyPI `sonilo-cli` >= 0.14.0).
- **Match stems to tracks by `stream_index`, never by array position.** A stream whose separation failed is simply absent, so `stems` can be shorter than `audio`.
- **`stems_error` is not a failed generation.** When separation failed wholly or partly, or was skipped, the task carries a `stems_error` string — possibly *alongside* a partial `stems` array. The generation itself succeeded and every `audio` URL is valid: treat missing stems as a missing extra, never as a reason to retry or refund.
- **Timing:** separation runs after generation finishes — typically another 2–6 min, giving up after 30 min (then `stems_error`).
- **The four stem names are fixed** (htdemucs separation): melodic instruments — piano, synths, guitar, strings — land in `other`, and on instrumental tracks `vocals` is near-silent. That is correct behavior, not a bug.
- **Formats:** stems normally follow `output_format`; trust each stem's `content_type` for what was actually delivered.
```bash
# REST: submit with stems, then poll the task
curl -X POST "https://api.sonilo.com/v1/text-to-music" \
-H "Authorization: Bearer $SONILO_API_KEY" \
--data-urlencode "prompt=A chill lo-fi hip hop beat with jazzy piano chords" \
--data-urlencode "duration=30" \
--data-urlencode "mode=async" \
--data-urlencode "stems=true"
# → {"task_id": "…"} — poll GET /v1/tasks/{task_id} for audio + stems
```
## Prompting
The prompt is the only input — there is no footage to lean on. Describe genre,
mood, tempo, instrumentation, and the energy arc; "A driving synthwave track
with arpeggiated leads" beats "electronic music." Describe structure in words
too ("builds for 10 s, drops, outro"), since there is no cut to infer it from.
Name exclusions explicitly — the sounds that must not appear.
The same craft vocabulary applies as for video scoring, minus the video
pre-flight: [references/music-prompting.md](../references/music-prompting.md).
Generate once and iterate on the prompt, not on rerolls — failed runs
auto-refund, but your own retry is a new charge.
## Workflow Tips
- **If the user has a finished video, you are in the wrong skill.** [video-to-music](../video-to-music) syncs to the actual cut instead of producing a generic track of matching length.
- **Duration is required here.** Don't guess it — ask if the user hasn't said.
- **Several takes in one go:** `variants_num=3` returns three distinct directions for one request instead of three re-rolls. It costs 3×, and it is never free-trial covered — say the price before calling.
- **User wants the track's instruments as separate files** (to remix, re-balance, or drop one)? `stems=true` — it's free, but async-only and not on every surface yet; see [Stems](#stems).
- **Content restriction:** prompts cannot reference specific artists, bands, or copyrighted lyrics.
## Recovering a Timed-Out Call
`text_to_music` streams its result in one call unless `output_format="wav"`,
`variants_num` above 1, or `stems=true` triggers the backend's async mode. If an async variant
times out, the error message includes a `task_id`; the generation keeps running
(and is already charged) on the backend. Call `get_sfx_task(task_id)` —
`get_generation_task(task_id)` on the hosted server — to retrieve the result;
see the [task-recovery](../task-recovery) skill.
## Output Files
`.m4a` by default (`.wav` if requested), named from the prompt (slugified) or `sonilo-<timestamp>.m4a`. Multiple parallel streams get a `-<index>` suffix.
## Error Handling
Common errors: `401` invalid key, `402` insufficient balance / trial exhausted, `422` invalid parameters (e.g. duration out of range), `429` rate limit. See the [account](../account) skill to check trial/usage before a call.
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: MIT
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
67/100
Promising
Trust
63/100
Sandbox only
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"Stars/forks activity: 114 stars, 8 forks; issue activity unavailable in current metadata",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"agent_proven": {
"version": "agent-proven-v1",
"score": 0,
"tier": "unproven",
"label": "Needs first agent run",
"summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
"metrics": {
"totalOutcomes": 0,
"successfulOutcomes": 0,
"failedOutcomes": 0,
"installAttempts": 0,
"installSuccessRate": null,
"successRate": null,
"recentSuccessRate": null,
"recentFailureRate": null,
"riskBlocked": 0,
"setupRequired": 0,
"notRelevant": 0,
"avgOutputQuality": null,
"avgTimeToUsefulMs": null,
"productionOutcomes": 0,
"humanReviewRequired": 0,
"uniqueAgents": 0,
"lastOutcomeAt": null
},
"signals": [],
"penalties": [
"No real agent outcome evidence yet"
]
},
"audit": {
"score": 77,
"risk_level": "needs_review",
"risk_label": "Needs review",
"warnings": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"Stars/forks activity: 114 stars, 8 forks; issue activity unavailable in current metadata",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 67,
"label": "Promising"
},
"supply": {
"track": "Design and creative production",
"scenario": "Design and creative",
"maintenance": "12d since push",
"risk": "Needs review"
},
"alternative_skills": [],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"high-compliance environments without internal security review",
"No OpenAgentSkill engagement data yet",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution"
],
"agent_contract": {
"task_input": "Use text-to-music in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 71/100 Manual review",
"Audit: 77/100 Needs review",
"Safety: 37/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "sonilo-ai-text-to-music (text-to-music)",
"install_command": "npx skills add sonilo-ai/skills --skill text-to-music",
"risk_summary": "Needs review; Blocked for auto-install; Review before production",
"verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
}
},
"outcome_feedback": {
"endpoint": "https://www.openagentskill.com/api/agent/outcome",
"method": "POST",
"requires_resolve_event_id": true,
"event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
"expected_outcomes": [
"success",
"failed",
"not_relevant",
"blocked_by_risk",
"setup_required"
],
"payload_template": {
"event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
"skill_slug": "sonilo-ai-text-to-music",
"task": "Use text-to-music in an agent workflow",
"agent": "codex",
"outcome": "success",
"install_used": true,
"risk_blocked": false,
"setup_required": false,
"task_success": true,
"output_quality": 4,
"error_type": null,
"human_review_required": false,
"workspace": "sandbox",
"time_to_useful_ms": 120000,
"notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
}
},
"endpoints": {
"web": "https://www.openagentskill.com/skills/sonilo-ai-text-to-music",
"api": "https://www.openagentskill.com/api/agent/skills/sonilo-ai-text-to-music",
"audit": "https://www.openagentskill.com/skills/sonilo-ai-text-to-music/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=sonilo-ai-text-to-music&task=Use%20text-to-music%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20text-to-music%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20text-to-music%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/sonilo-ai-text-to-music/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/sonilo-ai-text-to-music"
}
}Listing source
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[](https://www.openagentskill.com/skills/sonilo-ai-text-to-music/audit)
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Audit
77/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.