Music Theory MCP server

Read from the package source without running it. The installed server may list more.

• detect_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 data. [PRO — requires CODEDSWITCH_API_KEY]

• get_chord

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

• get_diatonic_chords

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

• get_genre_profile

  Get full genre intelligence: common chord progressions, scales, BPM range, instruments, rhythmic feel, swing amount, common keys, and mood descriptors. Supports trap, boom_bap, drill, lofi_hiphop, rnb, pop, afrobeats, reggaeton, jazz, edm, gospel. [PRO — requires CODEDSWITCH_API_KEY]

• get_genre_rhythms

  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 CODEDSWITCH_API_KEY]

• get_interval

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

• get_scale

  Get the notes, intervals, and modes for any musical scale. Supports 20+ scale types including major, minor, pentatonic, blues, dorian, phrygian, lydian, mixolydian, and more. [FREE]

• identify_chord

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

• resolve_progression

  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_genre

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

• suggest_next_chord

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

• transpose_note

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

• transpose_progression

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

• Code scan23 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancerepository not readable: repo not found3/15
• Maintainer identityno repository or website to verify2/10

Music Theory: common questions

Is Music Theory MCP server safe?

With care: it is graded C, so read the findings first (65/100). Read the Music Theory safety report

How do I install Music Theory?

It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.

Does Music Theory need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Music Theory maintained?

The latest release is v1.0.0.