ChordMuse Developers
The ChordMuse engine, in your product.
Chord progressions, songs, Progression Packs and chord tools over one API, with the same results the ChordMuse apps give. One key, one server.
What you get
Everything the ChordMuse apps know about chords
Built on the same engine as the apps, so a request gives your users exactly what ChordMuse gives.
Progressions
Chord progressions for any mood or genre, in any key, with their Roman numerals and an explanation of each.
Songs and song parts
A whole song, or one part that fits the parts you already have, with accompaniment patterns and theory notes.
Progression Packs
Curated packs of progressions for a style, adapted to the player's key, skill level and instrument.
Chord tools
Parse chord symbols, transpose, find Roman numerals, spell numerals as chords, and voice chords as notes.
For AI assistants
Every function as a tool definition, and an MCP server, so an assistant asks the engine instead of guessing.
Reproducible
The same request and seed always give the same result, and every response says which engine made it.
Getting started
From sign-in to your first call
- 1
Sign in
With Google or an email address.
- 2
Apply
Tell us about your product and how you'll use the API, and accept the API terms.
- 3
Get approved
We review every application before keys are issued.
- 4
Create a key
Create and name your keys, see your usage, and revoke a key whenever you need to.