Clef is answering right now. Last checked 5 min ago. It exposes 4 tools.
Read-only music guides, chord transposition, piano chord spelling and guitar-tab pitch mapping.
Clef missed one check this week
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.
claude mcp add clef --transport http https://clefdrills.com/mcphttps://clefdrills.com/mcp[mcp_servers.clef]
url = "https://clefdrills.com/mcp"{
"mcpServers": {
"clef": {
"url": "https://clefdrills.com/mcp"
}
}
}{
"servers": {
"clef": {
"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.
find_music_guides
spell_piano_chord
tab_to_piano_notes
transpose_chords
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://clefdrills.com/mcp | streamable-http | answering | 537 ms | 5 min ago |
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Clef — questions
Answers built from our own checks of this server.