This is a HTTP API to manage MSCZ files. The public API is at https://mscz-api.librescore.org/. 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.

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.

Examples are available in docs/examples, with an mscz file, its metadata, and the various conversions for that file. All files there were converted with the API. Providing mscz files to convert would help. GeneralUser Orchestral Example provided by Generaluser GS.