# THIRI Chord Intelligence (npm · @bluesprincemedia/thiri-mcp)

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

- Trust score: 63/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-04

## Components

- remote · `mcp.thiri.ai`: 71/100, [markdown](https://verifymcp.io/servers/ai-thiri-chord-intelligence/mcp.md), [page](https://verifymcp.io/servers/ai-thiri-chord-intelligence/mcp)
- npm · `@bluesprincemedia/thiri-mcp`: 63/100 (this document), [markdown](https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp.md), [page](https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp)

## Channel facts

- Registry: `npm`
- Package: `@bluesprincemedia/thiri-mcp`
- Version: `0.5.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-04.

- **Supply Chain Security**: 83/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known medium-severity CVE affects hono 4.12.33, reached via @modelcontextprotocol/sdk > hono. A fixed version is available.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 32/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (PolyForm-Noncommercial-1.0.0) isn't a recognized OSI-approved license.
  - Actively maintained (last published 2 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 85/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 750 tokens (~107/item across 7 items; 5 tools + 2 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add ai-thiri-chord-intelligence -- npx -y @bluesprincemedia/thiri-mcp
```

### Codex

```bash
codex mcp add ai-thiri-chord-intelligence -- npx -y @bluesprincemedia/thiri-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-thiri-chord-intelligence": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@bluesprincemedia/thiri-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-thiri-chord-intelligence --command npx --arg -y --arg @bluesprincemedia/thiri-mcp
```

### Hermes

```yaml
mcp_servers:
  ai-thiri-chord-intelligence:
    command: "npx"
    args: ["-y", "@bluesprincemedia/thiri-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "ai-thiri-chord-intelligence": {
      "command": "npx",
      "args": [
        "-y",
        "@bluesprincemedia/thiri-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-04 (score 63, −1)

- [security regression] CVE-2026-69207 affects this package: medium
- [security regression] Known CVEs: partial → fail

### 2026-08-02 (score 64, +18)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] License: unverified → fail
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Schema quality: 100 → unverified
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: PolyForm-Noncommercial-1.0.0

### 2026-08-01 (score 46)

First indexed and scored.

## MCP tools (5)

### `analyze_chord` (~100 tokens)

Parse a chord symbol into its root, quality, intervals, extensions, and harmonic function. When a key is provided, returns the Roman numeral, scale degree, and whether the chord is diatonic.

Input parameters:

- `chord` (string, required): Chord symbol (e.g. 'Dm7', 'Cmaj7/E', 'G7#11')
- `key` (string): Key center for functional analysis (e.g. 'C', 'Bb')

### `resolve_chord` (~54 tokens)

Resolve a chord symbol to spelled note names, frequencies in Hz, MIDI numbers, and recommended improvisation scales.

Input parameters:

- `chord` (string, required): Chord symbol (e.g. 'Cm7', 'F#dim7')

### `generate_voicing` (~250 tokens)

Generate instrument-ready voicings for a chord in a specified style. Pass previousNotes (or a previousVoicing object) from an earlier result to get a voiceLeadingScore for the transition. Styles: rootless, bill_evans, shell, triad, pad, guide-tones, guide-tone-1, guide-tone-2, both-guide-tones, drop-2, drop-3.

Input parameters:

- `chord` (string, required): Chord symbol (e.g. 'Dm7')
- `colorPreferences` (object): Explicit color-tone overrides
- `density` (number): Target voicing density / note count hint
- `keyContext` (string): Key context for diatonic color hooks (e.g. 'C major')
- `octave` (number): Base octave (default: 3)
- `previousNotes` (array): Previous voicing notes for voice leading (e.g. ['E3', 'G3', 'Bb3', 'D4'])
- `previousVoicing`: Prior generate_voicing JSON result for strict guide-tone line tracking
- `style` (string): Voicing style (default: 'pad'). bill_evans is an alias of rootless.

### `reharmonize` (~186 tokens)

Reharmonize a chord progression using jazz techniques. Returns one alternative per applicable technique, each with the new progression, the changes, and a plain-English explanation. With technique 'auto' (default) it returns every technique that applies. Techniques: tritone_sub, ii_v_insertion, modal_interchange, diminished_passing, secondary_dominant, chain_of_dominants, coltrane_changes, backdoor. (modal_interchange and backdoor require a key.)

Input parameters:

- `key` (string): Key center (e.g. 'C') — enables modal_interchange and backdoor
- `progression` (array, required): Chord symbols, one per bar (e.g. ['Cmaj7', 'Dm7', 'G7', 'Cmaj7'])
- `technique` (string): Reharmonization technique (default: 'auto' = all applicable)

### `conduct_band` (~102 tokens)

Arrange a 4-piece band from a natural-language prompt. Returns conductor tempo/groove, 4 lanes of note events, lead sheet, and base64 MIDI. Browser/client synthesizes audio via Csound; use thiri-conductor-mcp locally to render WAV.

Input parameters:

- `durationSec` (number): Optional target duration override
- `prompt` (string, required): Musical direction (e.g. '12-second neo-soul band in Eb, Rhodes + analog bass')

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp#diagnostics

## Score history

- 2026-08-04: 63
- 2026-08-03: 64
- 2026-08-02: 64
- 2026-08-01: 46

## Links

- npm package: https://www.npmjs.com/package/@bluesprincemedia/thiri-mcp
- Socket report: https://socket.dev/npm/package/@bluesprincemedia/thiri-mcp
- Repository: https://github.com/BluesPrince/thiri-mcp
- Website: https://thiri.ai/
- Changelog RSS feed: https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/ai-thiri-chord-intelligence/bluesprincemedia-thiri-mcp