Documentation is here https://github.com/NORDUnet/opennsa/blob/master/docs/rest-interface And yes, protocol documentation can be that short. It is not 100% feature parity with the SOAP protocol. Some of that is intentional, and some just haven't been implemented (recursive query should probably be in there). Best regards, Henrik Henrik Thostrup Jensen <htj at nordu.net> Software Developer, NORDUnet