This is a HTTP API to manage MSCZ files. The API is not public yet. Source code is under the GPLv3.

The rate limit is 100 API calls for ten minutes. An API call is one HTTP request.

The /meta path takes a MSCZ file through a post request (application/x-musescore). and sends back a JSON file with metadata. Here would be an example of the metadata:

{
    "title": "River Flows in You",
    "author": "emmy langevin",
    "instruments": [
        "piano"
    ]
}

For conversion, you POST /<format>/<instrument>. The available formats are midi, mxml, and mmxl. It will return the appropriate mime-type for <format>. <instument> is the ID of the excerpt from the metadata, so a /meta request should be made before conversion. Simply POST /<format> for the full score.

(TBD)