npm:music-theory-mcp

Get the notes, intervals, and modes for any musical scale. Supports 20+ scale types including major, minor, pentatonic, blues, dorian, phrygian, lydia

Get the notes and intervals for any chord type. Supports triads, 7ths, 9ths, 11ths, 13ths, sus, aug, dim, and more (22+ chord types). [FREE]

Identify a chord from a set of note names. Returns all possible interpretations with root, type, and inversion. [PRO — requires CODEDSWITCH_API_KEY]

Detect the most likely musical key from a set of observed notes. Returns top candidates with confidence scores. Useful for analyzing melodies or MIDI

Resolve a Roman numeral chord progression (e.g., I-V-vi-IV) to actual chord names and notes in a given key. [PRO — requires CODEDSWITCH_API_KEY]

Suggest what chord should come next based on common voice leading tendencies. Given a current chord and key, returns ranked suggestions. [PRO — requir

Get all 7 diatonic chords in a key with Roman numerals, chord symbols, and notes. [PRO — requires CODEDSWITCH_API_KEY]

Get full genre intelligence: common chord progressions, scales, BPM range, instruments, rhythmic feel, swing amount, common keys, and mood descriptors

Suggest a genre based on BPM, key, mood, or scale. Returns ranked matches with reasoning. [PRO — requires CODEDSWITCH_API_KEY]

Get common drum/rhythm patterns for a genre. Returns kick, snare, and hi-hat step patterns ready to load into a beat maker. [PRO — requires CODEDSWITC

Transpose a single note up or down by a number of semitones. [FREE]

Transpose an entire chord progression by a number of semitones. Takes an array of {root, type} objects. [PRO — requires CODEDSWITCH_API_KEY]

Get the musical interval name between two notes (e.g., C to G = P5). [FREE]