Notation MCP server

What it does

MCP server for music notation, harmonic analysis, and engraving validation. Exposes three tools: render JSON scores to SVG/MusicXML/MIDI, analyze scores for harmony and keys, and check notation against a 423-rule engraving rulebook. For any application working with music: composition, analysis, MIDI pipelines, or theory Q&A.

• Render a JSON score to SVG and MIDI in a single call without needing a GUI music-notation tool.
• Analyze a MusicXML file to extract Roman numeral harmony, key changes, cadences, and range violations for each instrument.
• Check whether a score violates music-engraving conventions by querying a searchable rulebook with citable sources and rule IDs.

Tools this server exposes

Tool	Does
notation_render	Convert a JSON score to inline SVG, MusicXML, and MIDI in one call.
notation_validate	Validate JSON score shape before rendering.
notation_examples	Retrieve canonical JSON input examples for score structure.
notation_schema	Fetch the JSON Schema for valid score input.
knowledge_search	Search a curated music-theory knowledge base for reference material.
theory_analyze_score	Parse MusicXML and return full harmonic analysis including keys, chords, cadences, and related theory knowledge.
theory_parse_xml	Convert a MusicXML string to a structured Score JSON object.
theory_validate_ranges	Check whether notes in a score fall within each instrument's practical playing range.
theory_respell	Suggest preferred enharmonic spellings for pitches in a given key context.
theory_pitch_utils	Perform pitch arithmetic: convert MIDI to pitch notation, transpose, calculate interval names.
engraving_rules	Search 423 music-engraving rules by text, domain, or severity.
engraving_rule	Fetch a single engraving rule by ID with its citation and related rules.
engraving_check	Validate a MusicXML score against the engraving rulebook and report violations by rule ID.

Before you enable it

An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.