Clef Music Tools MCP Server

by melmayssonowen Your server? Claim it

answering

Clef Music Tools is answering right now. Last checked 7 min ago. It exposes 4 tools. Last commit 9 Nov 2026.

Transpose chords, spell piano chords, turn guitar tab into piano notes and find music guides.

Uptime history 65 hours of history

65 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

461 ms

Response time

average over 24h

Stars

last commit 9 Nov 2026

Nothing serious here today

Today is the operative word: we check Clef Music Tools every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add clef-music-tools --transport http https://clefdrills.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://clefdrills.com/mcp

~/.codex/config.toml

[mcp_servers.clef-music-tools]
url = "https://clefdrills.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "clef-music-tools": {
      "url": "https://clefdrills.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "clef-music-tools": {
      "type": "http",
      "url": "https://clefdrills.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

music

find_music_guides

Find Clef instructional guides by words in the title and description. Guides are not file converters.

spell

spell_piano_chord

Spell a supported chord as piano pitches with octave and MIDI values. This does not create a rhythmic arrangement.

tab

tab_to_piano_notes

Convert six-string ASCII guitar tab to sounding piano pitches. Tab spacing does not specify note duration. No GP files or audio uploads.

transpose

transpose_chords

Transpose chord symbols, including slash bass notes. Does not process audio, lyrics, or notation files.

Endpoints

URL	Transport	State	Latency	Checked
https://clefdrills.com/mcp	streamable-http	answering	540 ms	7 min ago

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Clef Music Tools — questions

Answers built from our own checks of this server.

What can Clef Music Tools do?

It exposes 4 tools, read directly from the server on our last check. Among them: find_music_guides, spell_piano_chord, tab_to_piano_notes, transpose_chords. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Clef Music Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 461 ms. The bar chart above shows every period we have measured.

How do I connect Clef Music Tools?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Clef Music Tools need an API key?

No. Clef Music Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Clef Music Tools?

It answers our handshake in 461 ms on average, which is faster than 25% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Clef Music Tools open source?

The code is open source: it is published under the MIT licence, written in Python and 1 stars on GitHub. The licence covers the code in the repository, not the hosted service at clefdrills.com, which runs on its operator's own terms.