Koskamo

THIRI Chord Intelligence MCP

Provides deterministic music theory tools for AI agents, including chord analysis, resolution, voicing generation, reharmonization, and band conducting via five specific tools.

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Endpoint and access

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THIRI Chord Intelligence MCP logo, by Blues Prince MediaVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-07Operated by Blues Prince Media
MCP endpoint (Streamable HTTP)
https://mcp.thiri.ai/mcp
Vendor documentation

What its tools do

4 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (4)

4 of 4 have a description · 4 of 4 declare behavior hints · 0 of 4 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to thiri.ai ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Analyze chord symbols or notes to determine root, quality, and function.
  • Generate instrument-ready voicings with voice-leading from previous chords.
  • Create up to eight reharmonization alternatives for a musical progression.
  • Conduct a band by generating note events, lead sheets, and MIDI files.

Source and maintenance

Vendor evidenceRegistry 0.5.2
mcp-registry: ai.thiri/chord-intelligence@0.5.2Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
THIRI Chord Intelligence 0.2.0
MCP protocol negotiated in check
2025-11-25
Tools
4 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Tools

4 advertised

analyze_chord
Advertised by the server during the last successful anonymous check.
Advertised read-only

Parse a chord into root, quality, intervals, and (with a key) roman numeral + function. Numerals use the jazz convention by default (Cmaj7 in Am = ♭IIIΔ7); both jazz and classical numerals are always returned in `numerals`, and other valid readings in `alternatives`. Pass `scale` to read a minor key as harmonic or melodic minor.

analyze_chord input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "chord"
  ],
  "properties": {
    "key": {
      "type": "string"
    },
    "chord": {
      "type": "string"
    },
    "scale": {
      "enum": [
        "major",
        "natural_minor",
        "harmonic_minor",
        "melodic_minor"
      ],
      "type": "string",
      "description": "Scale to read the key in. Default: major, or natural minor with the harmonic-minor V for minor keys."
    },
    "convention": {
      "enum": [
        "jazz",
        "classical"
      ],
      "type": "string",
      "description": "Which numeral convention fills `numeral`. Default: jazz."
    }
  }
}
analyze_chord annotations
{
  "title": "Analyze Chord",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
resolve_chord
Advertised by the server during the last successful anonymous check.
Advertised read-only

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

resolve_chord input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "chord"
  ],
  "properties": {
    "chord": {
      "type": "string"
    }
  }
}
resolve_chord annotations
{
  "title": "Resolve Chord",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
generate_voicing
Advertised by the server during the last successful anonymous check.
Advertised read-only

Instrument-ready voicing in a style; pass previousNotes for a voice-leading score.

generate_voicing input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "chord"
  ],
  "properties": {
    "chord": {
      "type": "string"
    },
    "style": {
      "type": "string"
    },
    "octave": {
      "type": "number"
    },
    "keyContext": {
      "type": "string"
    },
    "previousNotes": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  }
}
generate_voicing annotations
{
  "title": "Generate Voicing",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
reharmonize
Advertised by the server during the last successful anonymous check.
Advertised read-only

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

reharmonize input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "progression"
  ],
  "properties": {
    "key": {
      "type": "string"
    },
    "technique": {
      "type": "string"
    },
    "progression": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  }
}
reharmonize annotations
{
  "title": "Reharmonize Progression",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
192 ms
95th percentile latency
192 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 192 ms · metadata changed · 4 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http thiri-mcp https://mcp.thiri.ai/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add thiri-mcp --url https://mcp.thiri.ai/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable thiri-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "thiri-mcp": {
      "url": "https://mcp.thiri.ai/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "thiri-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.thiri.ai/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start thiri-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "thiri-mcp": {
      "type": "http",
      "url": "https://mcp.thiri.ai/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http thiri-mcp https://mcp.thiri.ai/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://mcp.thiri.ai/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "thiri-mcp": {
      "serverUrl": "https://mcp.thiri.ai/mcp"
    }
  }
}

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