# THIRI Chord Intelligence (slim)

> THIRI Chord Intelligence, an MCP server by thiri.ai, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Deterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed

- Full: https://www.anchorterminal.com/tools/thiri-chord-intelligence.md (~850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/tools/thiri-chord-intelligence.json · canonical https://www.anchorterminal.com/tools/thiri-chord-intelligence
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

# THIRI Chord Intelligence

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by thiri.ai (https://thiri.ai)
- Category: Music generation (https://www.anchorterminal.com/categories/music-generation.md)
- Listed because: It's published in the registry under thiri.ai, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Deterministic music theory for agents: analyze, voice, reharmonize, conduct — computed, not guessed

## Facts

- MCP registry: `ai.thiri/chord-intelligence` 0.5.2
- Endpoint: https://mcp.thiri.ai/mcp (streamable HTTP)
- Package: npm `@bluesprincemedia/thiri-mcp` (stdio)
- Source: https://github.com/BluesPrince/thiri-mcp
- Website: https://thiri.ai
- npm downloads a week: 61
- GitHub stars: 10
- Registry entry updated: 2026-08-01

## Tools

- Tools it lists (5, about 749 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:20 UTC):
  - `analyze_chord` (read-only): Parse a chord into root, quality, intervals, and (with a key) roman numeral + function.
  - `resolve_chord` (read-only): Resolve a chord to spelled notes, frequencies, MIDI, and recommended scales.
  - `generate_voicing` (read-only): 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…
  - `reharmonize` (read-only): Reharmonize a progression. Techniques: tritone_sub, ii_v_insertion, modal_interchange, diminished_passing, secondary_dominant, chain_of_dominants,…
  - `conduct_band` (read-only): 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…
- How its tools read to an agent (0 errors, 5 warnings, 1 note, about 749 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):
  - warn TC11 analyze_chord: none of its 2 parameters has a description
  - warn TC11 conduct_band: none of its 2 parameters has a description
  - warn TC11 generate_voicing: none of its 6 parameters has a description
  - warn TC11 reharmonize: none of its 3 parameters has a description
  - warn TC11 resolve_chord: its one parameter, chord, has no description
  - note TC24 server: 5 of 5 tools have no outputSchema

- JSON: https://www.anchorterminal.com/api/v1/tools/thiri-chord-intelligence.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming