# MusicXML to ABC (pypi · musicxml-abc-mcp)

Converts between MusicXML and ABC notation, so LLMs can read and edit scores

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-01

## Components

- pypi · `musicxml-abc-mcp`: 66/100 (this document), [markdown](https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp.md), [page](https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp)

## Channel facts

- Registry: `pypi`
- Package: `musicxml-abc-mcp`
- Version: `0.2.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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 2026-10-01.

- **Supply Chain Security**: 50/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised build step with no custom scripting around it.
  - 3 of 50 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 100/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to raulkivi/sheet-music-mcp).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 4 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 72/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 253 tokens (~50/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the MusicXML to ABC MCP server?

MusicXML to ABC runs locally as a PyPI package, launched with uvx musicxml-abc-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add raulkivi-musicxml-abc-mcp -- uvx musicxml-abc-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "raulkivi-musicxml-abc-mcp": {
      "command": "uvx",
      "args": [
        "musicxml-abc-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "raulkivi-musicxml-abc-mcp": {
      "command": "uvx",
      "args": [
        "musicxml-abc-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add raulkivi-musicxml-abc-mcp -- uvx musicxml-abc-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "raulkivi-musicxml-abc-mcp": {
      "type": "local",
      "command": [
        "uvx",
        "musicxml-abc-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add raulkivi-musicxml-abc-mcp --command uvx --arg musicxml-abc-mcp
```

### Hermes

```yaml
mcp_servers:
  raulkivi-musicxml-abc-mcp:
    command: "uvx"
    args: ["musicxml-abc-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "raulkivi-musicxml-abc-mcp": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "musicxml-abc-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add raulkivi-musicxml-abc-mcp -t stdio -c uvx -a musicxml-abc-mcp
```

### Other

```json
{
  "mcpServers": {
    "raulkivi-musicxml-abc-mcp": {
      "command": "uvx",
      "args": [
        "musicxml-abc-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-09-29 (score 66, +1)

- [security improvement] Known CVEs: partial → pass
- [functional] Dependency health: partial → 0.98

### 2026-09-28 (score 65, +9)

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

### 2026-09-27 (score 56, −15)

- [security regression] Malware scan: pass → unverified

### 2026-09-26 (score 71)

First indexed and scored.

## MCP tools (5)

### `musicxml_to_abc` (~86 tokens)

Convert a MusicXML document to ABC notation. ABC is compact and human-readable — ideal for Claude to read and edit scores directly. Optionally filter to a single part.

Input parameters:

- `musicxml` (string, required): MusicXML document as a string
- `part_id` (string): Export only this part (e.g. 'Soprano'). Omit to include all parts.

### `abc_to_musicxml` (~50 tokens)

Convert an ABC notation string back to MusicXML. Use this after Claude has read or edited an ABC score to produce MusicXML for synthesis or rendering.

Input parameters:

- `abc` (string, required): ABC notation string

### `validate_abc` (~41 tokens)

Validate an ABC notation string. Returns whether the ABC is parseable and lists any errors or warnings.

Input parameters:

- `abc` (string, required): ABC notation string to validate

### `list_capabilities` (~19 tokens)

List supported formats and available tools for this server

### `health_check` (~57 tokens)

Check that the server and all its dependencies are working correctly. Runs a short MusicXML → ABC → MusicXML round-trip and returns a human-readable status summary. Ask your AI assistant to run this tool to confirm the server is set up correctly.

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp#diagnostics

## Score history

- 2026-10-01: 66
- 2026-09-30: 66
- 2026-09-29: 66
- 2026-09-28: 65
- 2026-09-27: 56
- 2026-09-26: 71

## Common questions

### What is the MusicXML to ABC MCP server?

MusicXML to ABC is an MCP server listed in the public MCP registry as io.github.raulkivi/musicxml-abc-mcp. Converts between MusicXML and ABC notation, so LLMs can read and edit scores. This page covers its PyPI package (musicxml-abc-mcp).

### Is the MusicXML to ABC MCP server safe to use?

MusicXML to ABC scores 66 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 1 October 2026. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the MusicXML to ABC MCP server expose?

MusicXML to ABC exposes 5 tools: musicxml_to_abc, abc_to_musicxml, validate_abc, list_capabilities, health_check. Their descriptions and schemas cost roughly 253 tokens of context every time the server is loaded.

### Is the MusicXML to ABC MCP server still maintained?

MusicXML to ABC is still listed as active in the MCP registry. We last reached this channel on 1 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the MusicXML to ABC MCP server under?

MusicXML to ABC declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/musicxml-abc-mcp/
- Socket report: https://socket.dev/pypi/package/musicxml-abc-mcp
- Repository: https://github.com/raulkivi/sheet-music-mcp
- Changelog RSS feed: https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp.json
- HTML version of this page: https://verifymcp.io/servers/raulkivi-musicxml-abc-mcp/musicxml-abc-mcp