curl converter queries composed as indicated in the documentation fail. curl 'https://minerva-service.uni.lu/minerva/api/convert/GPML:SBML' -i -X POST --data-binary `@file.gpml` returns ` HTTP/1.1 500 {"reason":"Problem with input data","error":"Internal server error."} ` The problem is fixed by adding an explicit header information. Surprisingly, the query passed with `-H 'Content-Type: application/json'` and worked as expected for `application/xml`