io.github.mrfentmen/chord-mcp
Build chords and scales from note names locally. No network and no key.
MCP server · by mrfentmen
About
io.github.mrfentmen/chord-mcp is an MCP server published by mrfentmen. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Package
npm chord-mcp (chord-mcp on npm)
- npm downloads/week: 80 (2026-10-12)
- npm downloads/month: 786 (2026-10-12)
- Latest version on npm: 1.0.2, published 2026-09-27
- Declared version 1.0.1 is not listed on npm
npm facts come from the public npm registry (registry.npmjs.org, api.npmjs.org). Each figure is the registry's own and is never added to another. A registry that publishes no figure shows none: no number is not zero.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: npm package
Built from what Official MCP Registry declares.
claude mcp add --transport stdio chord-mcp -- npx -y chord-mcp[mcp_servers.chord-mcp]
command = "npx"
args = ["-y", "chord-mcp"]{
"mcpServers": {
"chord-mcp": {
"command": "npx",
"args": [
"-y",
"chord-mcp"
]
}
}
}Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.0.1 | Downloads/month (npm): 786 Downloads/week (npm): 80 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
clef io.github.MelMayssonOwen/clef
Read-only music guides, chord transposition, piano chord spelling and guitar-tab pitch mapping.
-
Deterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed
-
Chords, scales, progressions, transposition, and MIDI tools for music theory AI agents.
-
midi-tools-mcp io.github.mrfentmen/midi-tools-mcp
MIDI note math: note names, frequencies, and note numbers. No network and no key.
-
Chords, scales, transposition, capo and tempo maths, with links to free interactive music tools.
-
music-theory-mcp io.github.asume21/music-theory-mcp
Scales, chords, progressions, key detection, and genre intelligence for your AI. No API keys needed.
-
Gradus Notation + Harmonic Analyzer + Engraver: music tools for any AI agent. Free, no auth.
-
metronome-mcp io.github.mrfentmen/metronome-mcp
Tempo and timing math for musicians. No network and no key.
-
starsinger-mcp ai.starsinger/starsinger-mcp
Make a finished AI song with real vocals from a brief, or search and stream StarSinger's AI catalog
-
ABC sheet music + Strudel live coding: songs, videos and live jam sessions in ext-apps widgets.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Intelligent coding DJ for Claude Code. Adjusts Spotify music based on your coding mood, activity, and preferences. Includes /music commands (focus, hype, chill, debug, refactor…
-
Compose music with PyTheory — progressions, melodies, drums, and full arrangements rendered to audio or MIDI from pure Python.
-
Agents can now live code music for you, themselves, and each other while they work.
-
Enjoy background music while your AI coding agents do the heavy lifting. Stream lo-fi, jazz, classical, ambient, electronic, synthwave, and more—live from the internet, right in…
-
Convert MCP servers to token-efficient CLI tools with auto-generated SKILL.md files for Claude Code agents
Has a listing on Claude Code: claude-plugins-official (5)
-
mcp-server io.github.cap-js/mcp-server
Model Context Protocol (MCP) server for AI-assisted development of CAP applications.
-
Skills for creating MCP Apps with the MCP Apps SDK
-
mdk-mcp-server io.github.SAP/mdk-mcp-server
Model Context Protocol (MCP) server for AI-assisted development of MDK applications.
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
Detect an MCP server's language (Python, TypeScript or Go) and instrument it with the matching Pendo SDK so MCP tool calls flow into Pendo Agent Analytics.
Has a listing on Claude: knowledge-work-plugins (5)
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
MCP server for terminal commands, file operations, and process management
-
Unity's official plugin for Claude Code, with curated skills for game development, monetization, and performance optimization.
-
Secure access to Miro boards. Enables AI to read board context, create diagrams, and generate code with enterprise-grade security.
-
Connects Claude Code to the Synthflow AI voice-agent platform through its hosted MCP server, with skills for reviewing calls and auditing agent prompts, plus a docs-search…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
-
Build with OpenAI APIs, Agents SDK, and ChatGPT Apps, and create and save OpenAI API keys from Codex.
-
Install, open, and connect the signed ChatCut Desktop app from Codex.
-
Skills for NVIDIAs ecosystem spans GPU acceleration, CUDA, AI agents, inference, robotics, Physical AI, Omniverse, and simulation. This plugin helps you understand the pieces…
-
Cloudflare platform plugin with curated skills for Workers, Wrangler, and Agents SDK plus the official Cloudflare API MCP server.
Has a listing on Community GitHub marketplaces (5)
-
vibo-mcp io.github.chrischall/vibo-mcp
Vibo (vibodj.com) MCP — plan & manage event music: timeline, songs, ideas, questions, guests
-
GodPrompt MCP + Agent Skill for coding agents with TDD, debugging, verification, and task routing.
-
Post a project brief & publish cases on GPTaria from Claude Code, Cursor or Windsurf.
-
GEO scores and content-rewrite suggestions for any web page, as MCP tools.
-
livepilot io.github.dreamrec/livepilot
317-tool agentic MCP production system for Ableton Live 12 — device atlas, sample engine, composer
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Complete toolkit for building Model Context Protocol (MCP) servers in Go using the official github.com/modelcontextprotocol/go-sdk. Includes instructions for best practices, a…
-
Complete toolkit for building Model Context Protocol (MCP) servers in Kotlin using the official io.modelcontextprotocol:kotlin-sdk library. Includes instructions for best…
-
Complete toolkit for building Model Context Protocol (MCP) servers in TypeScript/Node.js using the official SDK. Includes instructions for best practices, a prompt for generating…
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
Model, visualize, and deploy applications with Radius from the GitHub Copilot app and CLI.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
-
model-apps
Build and deploy Power Apps generative pages for model-driven apps with specialist agents for planning, entity creation, and parallel code generation. Requires PAC CLI >= 2.7.0…
-
Advanced Security plugin for GitHub Copilot.
Has a listing on Cursor: cursor/plugins (5)
-
Build apps, scripts, and automations with the TypeScript SDK.
-
Let Grok Bot reach MCP servers on your private Tailscale network. Sign in to Tailscale to connect your tailnet; Grok Bot joins it as one tagged device and only reaches the hosts…
-
Fan large tasks out across parallel cloud agents with planners, workers, verifiers, and structured handoffs.
-
Iterative self-referential AI loops using the Ralph Wiggum technique.
-
Skills for building on the Cursor Origin API. Fetch the live spec first, then follow the Origin rules for credentials, scopes, webhooks, paging, and errors. Includes a skill that…
Has a listing on Docker MCP Catalog (5)
-
The Official Model Context Protocol (MCP) server for Kagi Search & other tools.
-
Giving Claude ability to run code with E2B via MCP (Model Context Protocol).
-
A unified MCP proxy that aggregates multiple MCP servers into one interface, enabling seamless tool discovery and management across all your AI interactions. Manage all your MCP…
-
A universal MCP (Model Context Protocol) server to integrate any API with Claude Desktop using only Docker configurations.
-
VeyraX MCP is the only connection you need to access all your tools in any MCP-compatible environment.
Has a listing on Official MCP Registry (5)
-
clef io.github.MelMayssonOwen/clef
Read-only music guides, chord transposition, piano chord spelling and guitar-tab pitch mapping.
-
Deterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed
-
Chords, scales, progressions, transposition, and MIDI tools for music theory AI agents.
-
midi-tools-mcp io.github.mrfentmen/midi-tools-mcp
MIDI note math: note names, frequencies, and note numbers. No network and no key.
-
Chords, scales, transposition, capo and tempo maths, with links to free interactive music tools.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.