MCP server

Clef

io.github.MelMayssonOwen/clef

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Read-only music guides, chord transposition, piano chord spelling and guitar-tab pitch mapping.

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

4

Token cost

About 489 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

{"mcpServers":{"clef":{"httpUrl":"https://clefdrills.com/mcp"}}}

Cursor

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

VS Code

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

Antigravity

agy mcp add clef https://clefdrills.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"clef","server_url":"https://clefdrills.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"clef","server_url":"https://clefdrills.com/mcp"}

Tools

• find_music_guides ~101 tokens
  Find Clef instructional guides by words in the title and description. Guides are not file converters.
• spell_piano_chord ~123 tokens
  Spell a supported chord as piano pitches with octave and MIDI values. This does not create a rhythmic arrangement.
• tab_to_piano_notes ~129 tokens
  Convert six-string ASCII guitar tab to sounding piano pitches. Tab spacing does not specify note duration. No GP files or audio uploads.
• transpose_chords ~136 tokens
  Transpose chord symbols, including slash bass notes. Does not process audio, lyrics, or notation files.

Browse

• GitHub tools
• Website monitoring
• GitHub and code hosting
• Music and audio

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Badge for your README

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