# Music21 Composer MCP

> Use this tool when you need to generate and transform musical compositions, solve problems such as creating melodies, harmonies, and counterpoints, and produce MIDI outputs through algorithmic composition. It takes musical constraints and parameters as inputs and produces transformed musical pieces as outputs. Ideal for music composers, producers, and researchers seeking to automate and enhance their creative workflows.

Canonical page: https://skillsregistry.net/skills/viktorkelemen-music21-composer-mcp  
JSON: https://api.skillsregistry.net/v1/skills/viktorkelemen-music21-composer-mcp

## Description

A composition-focused server built on music21 for generative music workflows, enabling melody generation, musical transformations, chord reharmonization, counterpoint creation, and MIDI export through constraint-based algorithmic composition tools.

## Trust

- **Trust score (0–1):** 0.97
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** media
- **Updated:** 2026-09-28

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/fxble7gcee)
- **Repository:** <https://github.com/viktorkelemen/music21-composer-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "viktorkelemen-music21-composer-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/viktorkelemen-music21-composer-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/viktorkelemen-music21-composer-mcp/pull`

---
SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt