The music_generate tool lets the agent create music or audio through the shared music-generation capability with configured providers — ComfyUI, fal, Google, MiniMax, and OpenRouter today.

For session-backed agent runs, OpenClaw starts music generation as a background task, tracks it in the task ledger, then wakes the agent again when the track is ready so the agent can tell the user and attach the finished audio. The completion agent follows the session's normal visible-reply mode: automatic final reply delivery when configured, or message(action="send") when the session requires the message tool. If the requester session is inactive or its active wake fails, and some generated audio is still missing from the completion reply, OpenClaw sends an idempotent direct fallback with only the missing audio.

Note

The built-in shared tool only appears when at least one music-generation provider is available. If you do not see music_generate in your agent's tools, configure agents.defaults.musicGenerationModel or set up a provider API key.

Quick start

Shared provider-backed

Configure auth

    Set an API key for at least one provider — for example
    `GEMINI_API_KEY` or `MINIMAX_API_KEY`.

Pick a default model (optional)

    ```json5
    {
      agents: {
        defaults: {
          musicGenerationModel: {
            primary: "google/lyria-3-clip-preview",
          },
        },
      },
    }
    ```

Ask the agent

    _"Generate an upbeat synthpop track about a night drive through a
    neon city."_

    The agent calls `music_generate` automatically. No tool
    allow-listing needed.
  




For direct synchronous contexts without a session-backed agent run,
the built-in tool still falls back to inline generation and returns
the final media path in the tool result.

ComfyUI workflow

Configure the workflow

    Configure `plugins.entries.comfy.config.music` with a workflow
    JSON and prompt/output nodes.

Cloud auth (optional)

    For Comfy Cloud, set `COMFY_API_KEY` or `COMFY_CLOUD_API_KEY`.

Call the tool

    ```text
    /tool music_generate prompt="Warm ambient synth loop with soft tape texture"
    ```

Example prompts:

Generate a cinematic piano track with soft strings and no vocals.

Generate an energetic chiptune loop about launching a rocket at sunrise.

Supported providers

Provider	Default model	Reference inputs	Supported controls	Auth
ComfyUI	workflow	Up to 1 image	Workflow-defined music or audio	COMFY_API_KEY, COMFY_CLOUD_API_KEY
fal	fal-ai/minimax-music/v2.6	None	lyrics, instrumental, durationSeconds, format	FAL_KEY or FAL_API_KEY
Google	lyria-3-clip-preview	Up to 10 images	lyrics, instrumental, format	GEMINI_API_KEY, GOOGLE_API_KEY
MiniMax	music-2.6	None	lyrics, instrumental, format=mp3	MINIMAX_API_KEY or MiniMax OAuth
OpenRouter	google/lyria-3-pro-preview	Up to 1 image	lyrics, instrumental, durationSeconds, format	OPENROUTER_API_KEY

Capability matrix

The explicit mode contract used by music_generate, contract tests, and the shared live sweep:

Provider	generate	edit	Edit limit	Shared live lanes
ComfyUI	✓	✓	1 image	Not in the shared sweep; covered by extensions/comfy/comfy.live.test.ts
fal	✓	—	None	generate
Google	✓	✓	10 images	generate, edit
MiniMax	✓	—	None	generate
OpenRouter	✓	✓	1 image	generate, edit

Use action: "list" to inspect available shared providers and models at runtime:

/tool music_generate action=list

Use action: "status" to inspect the active session-backed music task:

/tool music_generate action=status

Direct generation example:

/tool music_generate prompt="Dreamy lo-fi hip hop with vinyl texture and gentle rain" instrumental=true

Tool parameters

param

Music generation prompt. Required for action: "generate".

param

"status" returns the current session task; "list" inspects providers.

param

Provider/model override (e.g. google/lyria-3-pro-preview, comfy/workflow).

param

Optional lyrics when the provider supports explicit lyric input.

param

Request instrumental-only output when the provider supports it.

param

Single reference image path or URL.

param

Multiple reference images (up to 10 on supporting providers).

param

Target duration in seconds when the provider supports duration hints.

param

Output format hint when the provider supports it.

param

Output filename hint.

Note

Not all providers support all parameters. OpenClaw still validates hard limits such as input counts before submission. When a provider supports duration but uses a shorter maximum than the requested value, OpenClaw clamps to the closest supported duration. Truly unsupported optional hints are ignored with a warning when the selected provider or model cannot honor them. Tool results report applied settings; details.normalization captures any requested-to-applied mapping.

Provider request timeouts are operator configuration only. OpenClaw uses agents.defaults.musicGenerationModel.timeoutMs when configured, raises values below 120000ms to 120000ms, and otherwise defaults provider requests to 300000ms.

Async behavior

Session-backed music generation runs as a background task:

• Background task: music_generate creates a background task, returns a started/task response immediately, and posts the finished track later in a follow-up agent message.
• Duplicate prevention: while a task is queued or running, later music_generate calls in the same session return task status instead of starting another generation. Use action: "status" to check explicitly.
• Status lookup: openclaw tasks list or openclaw tasks show <taskId> inspects queued, running, and terminal status.
• Completion wake: OpenClaw injects an internal completion event back into the same session so the model can write the user-facing follow-up itself.
• Prompt hint: later user/manual turns in the same session get a small runtime hint when a music task is already in flight, so the model does not blindly call music_generate again.
• No-session fallback: direct/local contexts without a real agent session run inline and return the final audio result in the same turn.

Task lifecycle

State	Meaning
queued	Task created, waiting for the provider to accept it.
running	Provider is processing (typically 30 seconds to 3 minutes depending on provider and duration).
succeeded	Track ready; the agent wakes and posts it to the conversation.
failed	Provider error or timeout; the agent wakes with error details.

Check status from the CLI:

openclaw tasks list
openclaw tasks show <taskId>
openclaw tasks cancel <taskId>

Configuration

Model selection

{
  agents: {
    defaults: {
      musicGenerationModel: {
        primary: "google/lyria-3-clip-preview",
        fallbacks: ["fal/fal-ai/minimax-music/v2.6", "minimax/music-2.6"],
      },
    },
  },
}

Provider selection order

OpenClaw tries providers in this order:

1. model parameter from the tool call (if the agent specifies one).
2. musicGenerationModel.primary from config.
3. musicGenerationModel.fallbacks in order.
4. Auto-detection using auth-backed provider defaults only:
   • current default provider first;
   • remaining registered music-generation providers in provider-id order.

If a provider fails, the next candidate is tried automatically. If all fail, the error includes details from each attempt.

Set agents.defaults.mediaGenerationAutoProviderFallback: false to use only explicit model, primary, and fallbacks entries.

Provider notes

ComfyUI

Workflow-driven and depends on the configured graph plus node mapping
for prompt/output fields. The bundled `comfy` plugin plugs into the
shared `music_generate` tool through the music-generation provider
registry.

fal

Uses fal model endpoints through the shared provider auth path. The
bundled provider defaults to `fal-ai/minimax-music/v2.6` and also exposes
`fal-ai/ace-step/prompt-to-audio` and
`fal-ai/stable-audio-25/text-to-audio` for prompt-to-audio requests.

Google (Lyria 3)

Uses Lyria 3 batch generation. The current bundled flow supports
prompt, optional lyrics text, and optional reference images.

MiniMax

Uses the batch `music_generation` endpoint. Supports prompt, optional
lyrics, instrumental mode, and mp3 output through either `minimax`
API-key auth or `minimax-portal` OAuth.

OpenRouter

Uses OpenRouter chat completions audio output with streaming enabled. The
bundled provider defaults to `google/lyria-3-pro-preview` and also exposes
`openrouter/google/lyria-3-clip-preview`.

Choosing the right path

• Shared provider-backed when you want model selection, provider failover, and the built-in async task/status flow.
• Plugin path (ComfyUI) when you need a custom workflow graph or a provider that is not part of the shared bundled music capability.

If you are debugging ComfyUI-specific behavior, see ComfyUI. If you are debugging shared provider behavior, start with fal, Google (Gemini), MiniMax, or OpenRouter.

Provider capability modes

The shared music-generation contract supports explicit mode declarations:

• generate for prompt-only generation.
• edit when the request includes one or more reference images.

New provider implementations should prefer explicit mode blocks:

capabilities: {
  generate: {
    maxTracks: 1,
    supportsLyrics: true,
    supportsFormat: true,
  },
  edit: {
    enabled: true,
    maxTracks: 1,
    maxInputImages: 1,
    supportsFormat: true,
  },
}

Legacy flat fields such as maxInputImages, supportsLyrics, and supportsFormat are not enough to advertise edit support. Providers should declare generate and edit explicitly so live tests, contract tests, and the shared music_generate tool can validate mode support deterministically.

Live tests

Opt-in live coverage for the shared bundled providers:

OPENCLAW_LIVE_TEST=1 pnpm test:live -- extensions/music-generation-providers.live.test.ts

Repo wrapper:

pnpm test:live:media music

This live file uses already-exported provider env vars ahead of stored auth profiles by default, and runs both generate and declared edit coverage when the provider enables edit mode. Coverage today:

• google: generate plus edit
• fal: generate only
• minimax: generate only
• openrouter: generate plus edit
• comfy: separate Comfy live coverage, not the shared provider sweep

Opt-in live coverage for the bundled ComfyUI music path:

OPENCLAW_LIVE_TEST=1 COMFY_LIVE_TEST=1 pnpm test:live -- extensions/comfy/comfy.live.test.ts

The Comfy live file also covers comfy image and video workflows when those sections are configured.

Related

• Background tasks — task tracking for detached music_generate runs
• ComfyUI
• Configuration reference — musicGenerationModel config
• Google (Gemini)
• MiniMax
• Models — model configuration and failover
• Tools overview