MCP For Claude Marketplace
Music Theory Chord Engine

Music Theory Chord Engine MCP Connector for Claude

A+

Deterministic music theory calculator for precise chord structures and enharmonic spelling.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
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This MCP server provides precise, deterministic music theory calculations. It connects AI agents to advanced musical logic, allowing for the calculation of exact note names, intervals, and frequencies. Use analyze_chord_structure to get full chord details including semitone distances and 12-TET frequencies. Use get_roman_numeral to determine the functional role of a chord within a scale. The engine also includes validate_enharmonics to ensure note spellings are musically correct according to specific scale rules, preventing common enharmonic errors.

music-theorychordsscalesnotationfrequencies

3 tools expose this connector's capabilities to your AI agent.

analyze_chord_structure

Calculates the specific notes, intervals, and frequencies that make up a chord

get_roman_numeral

Determines the functional role of a chord within a specific scale

validate_enharmonics

Checks if a set of note names is musically "legal" within a specific scale context

See how to talk to your AI agent using Music Theory Chord Engine.

What are the notes and frequencies for a C Major triad in root position?

The notes for a C Major triad are C, E, and G. The frequencies are approximately 261.63 Hz, 329.63 Hz, and 392.00 Hz.

What is the Roman numeral for a D minor chord in the key of C Major?

The Roman numeral for a D minor chord in C Major is ii.

Is the note set [G#, B, D] valid in the key of A Major?

No, the note set is invalid in A Major because G# is not a member of the A Major scale.

The engine uses the provided scale context to determine the correct spelling. For example, it will enforce 'F' instead of 'E#' in a C Major context to maintain musical logic.

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