THIRI Chord Intelligence API

Developer Dashboard

Paste your API key to view your tier, quota usage, and recent activity. Your key is sent only to chords.thiri.ai from your browser — it never touches this site's server.

Need to create, rotate, or revoke keys? Go to your API keys.

Endpoints

All POST to https://chords.thiri.ai · Authorization: Bearer YOUR_KEY

/v2/analyzechord → root, quality, intervals, roman numeral, function

/v2/resolvechord → spelled notes, frequencies, MIDI, scale recs

/v2/voicinginstrument-ready voicings + voice-leading score

/v2/reharmonizeprogression → 8 reharmonization techniques

Quickstart

curl -s https://chords.thiri.ai/v2/analyze \
  -H "Authorization: Bearer YOUR_KEY" -H "Content-Type: application/json" \
  -d '{"chord":"Dm7b5","key":"C"}'

Use it in Claude / Cursor (MCP)

claude mcp add thiri --env THIRI_API_KEY=YOUR_KEY -- npx -y @bluesprincemedia/thiri-mcp

Keys can't be recovered — if you've lost yours, email dennison@bluesprincemedia.com to re-mint.