Musicboxmelodies MCP server

• Registry namecom.musicboxmelodies/music-boxverified in the MCP registry

The registry name sits under musicboxmelodies.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-18
• Tools17
• Server calls itselfmusicboxmelodies
• Server version1.2.0
• Protocol version2025-06-18

On 2026-10-18 the server answered initialize and tools/list without a sign-in. First answer in 215 ms.

• Whether its tools do the product's job has not been judged yet.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP score76 of 100answers 100 · definitions 91 · context 89 · lowered by the warning signs below
• Answered100% of days8 of 8 daily checks
• Median first answer231 ms
• Space in an agent's context≈ 4,591 tokensthe definitions of all its tools (17), which an agent carries on every turn
• Tool definitionsA · 91 of 100
• Typed results17 of 17 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 9 of 17

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• list_music_boxes

  Lists the music box types a melody can be written for, with their exact playable notes and rules. Call this before composing or validating a melody.

• search_songs

  Searches the public catalog of music box tunes made by the Musicboxmelodies community. Search by song name, artist or arranger; optionally only tunes that have a version for one box type. Returns at most 20 per page.

• get_song

  Gets a music box tune with its notes in the melody format (the same one validate_melody accepts), for one box version. Works for public tunes, for the signed-in person's own songs, and for a song this agent saved anonymously (pass its…

• validate_melody

  Checks whether a melody can be played on a music box: notes outside the box, same note repeated too fast, off-grid notes, tempo and length. Every issue names the note and how to fix it. Saves nothing. Call it before offering a melody to…

• fit_melody_to_box

  Adjusts a melody so it can be played on a music box and lists every change. Strategies: "transpose" (shift the whole melody to the key that fits best), "nearest_note" (move each unplayable note to the closest playable one)…

• list_products

  Lists what Musicboxmelodies sells, with current prices in US dollars and delivery times: custom music box melodies, custom printable strip designs and PRO composer accounts. Orders are placed and paid by the person on the website.

• create_song

  Saves a melody as a new private song. The melody must have no errors (run validate_melody or fit_melody_to_box first); warnings such as notes repeated too quickly are saved and marked, as in the composer. If the person is signed in, the…

• add_version

  Saves a melody as the version of an existing song for one box (a song can have one version per box: 15, 20, 30 notes or freestyle). Replaces that box's version if it exists. Works on the signed-in person's songs, or on a song saved…

• list_my_songs

  Lists the signed-in person's songs on Musicboxmelodies, newest first, including private ones. Requires signing in.

• set_song_visibility

  Makes one of the signed-in person's songs public (anyone can find and play it on musicboxmelodies.com) or private. Only make a song public when the person asked for it: ask them to confirm, then call again with confirmed: true.

• delete_song

  Permanently deletes one of the signed-in person's songs (all its box versions), or a song you saved without an account (pass its claim_token). This cannot be undone: tell the person which song will be deleted, ask them to confirm, then…

• export_song

  Creates a download link for one box version of a song: an MP3, a MIDI file or a printable strip PDF to cut and punch for a hand-crank music box ("pdf_long" is one continuous strip, "pdf_a4"/"pdf_letter" are sliced to fit the page). Works…

• render_audio

  Creates an MP3 of a melody (before or without saving it) or of a saved song, so you and the person can hear it. Pass either song_id or a melody (box, bpm, notes). Sounds: "synth" (free, the site's default sound) or "music_box" (real music…

• import_midi

  Converts a MIDI file (base64, up to 512 KB) into the melody format and validates it for a box, so you can fit, edit and save it. Drums are ignored. Saves nothing.

• get_product_options

  Lists the variations (with prices in US dollars) and the details needed to order a custom music box melody or a custom strip design. Call it before prepare_order.

• prepare_order

  Prepares a custom melody or strip design order with all its details and returns a link to the Musicboxmelodies cart, where the person reviews it, adds photos if needed, applies discount codes and pays with PayPal. Nothing is charged here…

• get_order_status

  Shows the signed-in person's orders (newest first) or one order: its status, items, price and, once delivered, the links to the finished files. Requires signing in.