# Lacuna Music (remote · www.lacuna.fm)

Generate AI music via the Lacuna Music API from MCP clients like Claude Desktop & Code.

- Trust score: 79/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-12

## Components

- remote · `www.lacuna.fm`: 79/100 (this document), [markdown](https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www.md), [page](https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www)
- npm · `lacuna-mcp`: 38/100, [markdown](https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/lacuna-mcp.md), [page](https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/lacuna-mcp)

## Channel facts

- Endpoint: `https://www.lacuna.fm/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.3.4`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-12.

- **Endpoint Security**: 97/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 82/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 410 tokens (~136/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http joylink-ltd-lacuna-mcp https://www.lacuna.fm/mcp
```

### Codex

```toml
[mcp_servers.joylink-ltd-lacuna-mcp]
url = "https://www.lacuna.fm/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "joylink-ltd-lacuna-mcp": {
      "type": "remote",
      "url": "https://www.lacuna.fm/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add joylink-ltd-lacuna-mcp --url https://www.lacuna.fm/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  joylink-ltd-lacuna-mcp:
    url: "https://www.lacuna.fm/mcp"
```

### Other

```json
{
  "mcpServers": {
    "joylink-ltd-lacuna-mcp": {
      "type": "http",
      "url": "https://www.lacuna.fm/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-11 (score 79, +2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-08-10 (score 77)

First indexed and scored.

## MCP tools (3)

### `generate_music` (~229 tokens)

Generate music

Create an AI music generation task on Lacuna. Returns immediately with a `pending` task; poll `get_generation` to retrieve the finished tracks and their audio URLs.

Input parameters:

- `audio_weight` (number): Audio reference weight 0–1 (aether only).
- `instrumental` (boolean): Generate an instrumental track (no lyrics). Defaults to false.
- `lyrics` (string): Lyrics in plain text. Required unless `instrumental` is true.
- `model` (string): Generation model. Defaults to `aether`. Call `list_models` for what each one covers.
- `negative_tags` (string): Negative style tags to avoid (aether only).
- `style` (string, required): Style description, e.g. "pop, female vocal, 120 bpm, energetic".
- `style_weight` (number): Style weight 0–1 (aether only).
- `title` (string, required): Track title.
- `vocal_gender` (string): Lead vocal gender hint (aether only).
- `weirdness_constraint` (number): Weirdness constraint 0–1 (aether only).

### `get_generation` (~54 tokens)

Get generation

Retrieve the current state of a music generation task by id. Status is `pending`, `ready`, or `failed`; audio URLs appear on `ready`.

Input parameters:

- `id` (string, required): Generation task id, returned by generate_music.

### `list_models` (~33 tokens)

List models

List the music models available through the API, with their credit cost per task, tracks produced per task, and language coverage.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www#diagnostics

## Score history

- 2026-08-12: 79
- 2026-08-11: 79
- 2026-08-10: 77

## Links

- Remote endpoint: https://www.lacuna.fm/mcp
- Repository: https://github.com/JOYLINK-LTD/lacuna-toolkit
- Website: https://www.lacuna.fm/
- Changelog RSS feed: https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www.xml
- Changelog JSON feed: https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www.json
- HTML version of this page: https://verifymcp.io/servers/joylink-ltd-lacuna-mcp/www