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Directory / Fretwork Guitar Tools
Fretwork Guitar Tools
by mcp.guitarfretwork.com · https://mcp.guitarfretwork.com/mcp
Guitar chords from frets, chord shapes, transposing, capo, scales, song keys and practice plans.
11 of 11 checks · 29 Oct 2026
Is Fretwork Guitar Tools MCP server safe?
- No hidden instructions were found in its tool descriptions.
- Its error messages showed no secrets or internal details.
- All 9 of its tools are labeled read-only.
- Overall it scored 90/100 on 29 Oct 2026.
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What it can do
9 tools, in the server's own words.
identify_chordread-onlyNames the chord a guitarist is holding from the fret on each string (standard tuning), lists its notes and returns a chord diagram.
get_chord_shapesread-onlyReturns playable guitar shapes for a chord name (open position and movable barre shapes), with frets, fingering where known, the notes in the chord and a text …
transpose_chordsread-onlyMoves a song's chords to a new key.
find_caporead-onlyWorks out where to put a capo.
get_scaleread-onlyGives the notes of a scale in any key and where they fall on the guitar fretboard (standard tuning), string by string, with root notes marked.
find_keyread-onlyWorks out the most likely key of a song from its chord progression, gives each chord its Roman numeral, lists the other chords that belong to the key, and sugg…
find_songsread-onlyFinds songs a guitarist can play with the chords they already know, from Fretwork's free library of 87 public-domain folk, gospel, blues, campfire and Christma…
guitar_level_checkread-onlyA quick self-assessment that places a guitarist on Fretwork's 10-stage learning path (Stage 0 Getting Started to Stage 9 Artistry) from yes/no answers to up to…
make_practice_planread-onlyBuilds a daily guitar practice routine and a 4-week focus plan sized to the player's level, the minutes they have each day and their goal (songs, strumming, fi…
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Bad inputs give a clean errornote
1 warning
- !guitar_level_check: Accepted wrong type for "tune_and_clean_notes" without complaining
- and 15 more
- ✓ConnectsConnected in 110 mspass
- ✓Lists its toolsFound 9 toolspass
- ✓Every tool is describedAll 9 tools and their inputs are describedpass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No hidden instructionsNo hidden instructions found in tool descriptionspass
- ✓Tools work with good inputspass
All good
- ✓identify_chord: Answered with an error, probably because of our sample input: Give six frets, low E string first, using x for muted strings, for example "x32010" or "3 2 0 0 0 3".
- ✓get_chord_shapes: Answered with an error, probably because of our sample input: "test" is not a chord name I can read. Try something like F, Bm, F#m7, Cadd9 or G/B.
- ✓transpose_chords: Answered with an error, probably because of our sample input: Give to_key (for example "Bb") or a number of semitones.
- ✓find_capo: Answered with an error, probably because of our sample input: I could not read the key "test". Try "Bb" or "F# minor".
- ✓get_scale: Answered with an error, probably because of our sample input: "test" is not a note name. Use A to G with # or b, e.g. "F#".
- ✓find_key: Answered with an error, probably because of our sample input: Give the chords, for example "G D Em C".
- ✓find_songs: Answered with an error, probably because of our sample input: List the chords you can play, for example "G C D Em".
- ✓guitar_level_check: Worked (14 ms)
- and 1 more
- ✓Fast enoughpass
All good
- ✓Connecting took 110 ms
- ✓Listing tools took 31 ms
- ✓Average tool answer: 17 ms
- ✓identify_chord: Slowest tool: identify_chord (29 ms)
- ✓No secrets leakedChecked 24 error messages: no secrets or internal detailspass
- ✓Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guidepass
- –Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)not tested
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://mcp.guitarfretwork.com/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/com-guitarfretwork-fretwork.html)Score over time
- 29 Oct 202690
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use Fretwork Guitar Tools, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor (coming soon) tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. You'll also be able to claim this page and get a verified owner mark. Founding price: $19/month for life for the first 50 teams.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works