THIRI Chord Intelligence MCP server
online · 100% uptimeai.thiri/chord-intelligence·v0.5.2·10 starsDeterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed
10 stars47 downloads/wk
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If you have run it, two minutes of your experience saves the next person an afternoon.
THIRI Chord Intelligence tools (5)
write = sends, deletes, buys or postsanalyze_chordFreeParse a chord into root, quality, intervals, and (with a key) roman numeral + function.
conduct_bandFreeArrange a 4-piece band from a natural-language prompt. Returns conductor tempo/groove, 4 lanes of note events, lead sheet, and base64 MIDI. Audio render (Csound → WAV) stays on local thiri-conductor-mcp / POST /v2/render.
generate_voicingFreeInstrument-ready voicing in a style. Tension symbols voice by seat substitution (arranging practice, not stacking): 9/b9/#9 replace the root, #11/13/b13 replace the 5th, the 3rd and 7th are untouched guide tones. Pass voices: 5 to promote the implied 9 of an 11/13 chord; pass previousNotes for a voice-leading score.
reharmonizeFreeReharmonize a progression. Techniques: tritone_sub, ii_v_insertion, modal_interchange, diminished_passing, secondary_dominant, chain_of_dominants, coltrane_changes, backdoor (or auto).
resolve_chordFreeResolve a chord to spelled notes, frequencies, MIDI, and recommended scales.
Public scan report
scanner v0.1.9 · 2026-09-24 · same rubric, same numbers if you re-run it
- Code scan6 source files scanned25/25
- Live reliabilityremote reachable in 610ms20/20
- Tool poisoning5 tool descriptions checked15/15
- Auth qualityopen endpoint, read-only tools10/15
- Maintenancelast push 45 days ago12/15
- Maintainer identitynamespace and repository owner differ; GitHub account older than a year; website matches verified namespace7/10
How THIRI Chord Intelligence compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 89/100
- higher than 80% of 48,255 servers
- Tools
- 5
- the typical server has 7
- Tools that change things
- 0%
- typical: 0%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote server answers 100%
- Response time
- 168 ms
- faster than 69% of 30,031 servers
- GitHub stars
- 10
- more than 88% of 28,688 servers
- Downloads a week
- 47
- more than 39% of 12,191 servers with a package
What its tools let an agent do: 4 read · 1 create
Install THIRI Chord Intelligence in Claude Code, Cursor or VS Code
claude mcp add --transport http chord-intelligence https://mcp.thiri.ai/mcp
What the publisher says
From the THIRI Chord Intelligence repository's README, as published. We do not edit it. Read it on GitHub
🎷 THIRI Chord Intelligence — MCP Server
Give your AI real music theory. THIRI is the deterministic music theory MCP server + API for AI builders — it lets Claude, Cursor, or any MCP agent analyze chords, run roman-numeral analysis, generate voicings, and reharmonize progressions with answers that are computed, not guessed.
LLMs hallucinate music theory: wrong notes, fake roman numerals, voicings that don't voice-lead. THIRI is a deterministic engine (pitch-class-set theory over ℤ/12) behind a hosted API — so C7sus4 keeps its suspension, Caug spells C E G#, and "Coltrane changes on Dm7 G7 Cmaj7" returns Cmaj7 Ab7 Abmaj7 E7, every time.
Downstream of Suno / Udio or any generator? Wrap the output and get a correct chord chart your agent can trust. And unlike tonal.js or music21, THIRI is hosted and agent-native (no install, any language) — and it reharmonizes and voice-leads, not just looks chords up.
⭐ If this is useful, star the repo — it helps other musicians and agent builders find it.
👥 Join the First 55 AI Music Builders: Want elevated rate limits (300 req/min), direct founder support, and early access to upcoming tools? Join our developer community on Skool — Blues People AI.
Musicians: 2-minute setup (no code)
- Get a free key at build.thiri.ai/developers
- In Claude: Settings → Connectors → Add custom connector → URL https://mcp.thiri.ai/mcp → paste your sklive key
- Ask Claude: "Reharmonize Dm7 G7 Cmaj7 with Coltrane changes."
That's it — no install, no config file. Builders: full install options (Claude Code, Desktop config, raw HTTP) are below.
What you can ask
"Analyze Dm7b5 in C." → iiø7, half-diminished, borrowed predominant, + scale options
"What notes are in C7sus4?" → C F G Bb (the suspension survives)
"Give me a rootless Cmaj7 voicing, then voice-lead into Dm7." → voicings + a voice-leading score
"Reharmonize Dm7 G7 Cmaj7 with Coltrane changes." → Cmaj7 Ab7 Abmaj7 E7
Tools
Runs on the v2 grid engine — correct sus chords, real triads, enharmonic spelling, all altered dominants — with request timeouts, quota reporting, and structured errors.
Conductor & composition companions (Desktop only)
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
THIRI Chord Intelligence: common questions
- Is THIRI Chord Intelligence MCP server safe?
- Yes, by our scan: it is graded A (89/100). Read the THIRI Chord Intelligence safety report
- How do I install THIRI Chord Intelligence?
- It runs remotely at mcp.thiri.ai. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does THIRI Chord Intelligence need an API key?
- Yes. The registry entry asks for
THIRI_API_KEY. - Is THIRI Chord Intelligence maintained?
- The last commit was 86 days ago (2026-08-10). The latest release is v0.5.2.
- Is THIRI Chord Intelligence up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- How does THIRI Chord Intelligence compare with other MCP servers?
- safety score 89/100 (higher than 80% of 48,255 servers); tools 5 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.