THIRI Chord Intelligence MCP Server

by thiri Your server? Claim it

answering

THIRI Chord Intelligence is answering right now. Last checked 8 min ago. 58 installs a week from npm. It exposes 5 tools. Last commit 10 Aug 2026.

Deterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed

Installs per day peak 24 · avg 12 · +62% w/w

a month agotoday

Uptime history 51 days of history · worst day 95%

51 days agonow

98.9%

Uptime 24h

90 of 91 checks

Tools

read from the server

306 ms

Response time

average over 24h

Installs / week

npm and PyPI

What changed 3

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 1 September 2026. No other catalogue keeps this.

1 Sep a tool description was rewritten generate_voicing

1 Sep a tool changed the parameters it asks for generate_voicing

1 Sep a tool changed version

THIRI Chord Intelligence does not always answer

Over the last week it answered 98.7% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not 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 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add chord-intelligence --transport http https://mcp.thiri.ai/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "chord-intelligence": {
      "url": "https://mcp.thiri.ai/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.chord-intelligence]
url = "https://mcp.thiri.ai/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "chord-intelligence": {
      "url": "https://mcp.thiri.ai/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "chord-intelligence": {
      "url": "https://mcp.thiri.ai/mcp"
    }
  }
}

This one needs environment variables set before it will start: THIRI_API_KEY (THIRI API key (sk_live_…) — free at build.thiri.ai/developers). The author declared them in the registry entry; get the values from the project itself.

Available tools 5

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

analyze

analyze_chord

Parse a chord into root, quality, intervals, and (with a key) roman numeral + function.

conduct

conduct_band

Arrange 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

generate_voicing

Instrument-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.

reharmonize

reharmonize

Reharmonize a progression. Techniques: tritone_sub, ii_v_insertion, modal_interchange, diminished_passing, secondary_dominant, chain_of_dominants, coltrane_changes, backdoor (or auto).

resolve

resolve_chord

Resolve a chord to spelled notes, frequencies, MIDI, and recommended scales.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.thiri.ai/mcp	streamable-http	answering	529 ms	8 min ago

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THIRI Chord Intelligence — questions

Answers built from our own checks of this server.

What can THIRI Chord Intelligence do?

It exposes 5 tools, read directly from the server on our last check. Among them: analyze_chord, conduct_band, generate_voicing, reharmonize, resolve_chord. 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 THIRI Chord Intelligence working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 306 ms. The bar chart above shows every period we have measured.

How do I connect THIRI Chord Intelligence?

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

Does THIRI Chord Intelligence need an API key?

No. THIRI Chord Intelligence completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is THIRI Chord Intelligence?

It answers our handshake in 306 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use THIRI Chord Intelligence?

The npm package @bluesprincemedia/thiri-mcp was installed 58 times in the last week. Week over week that is +62%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is THIRI Chord Intelligence open source?

No, and the distinction matters: its licence is declared as PolyForm-Noncommercial-1.0.0. That makes it source-available — you can read the code, but the terms are the author's own, not one of the recognised open-source licences. Read them before you build on it.