Is it possible to call signup, signign, refresh etc by hand without a request (like for verify_session with get_session_without_request_response)?

hey @trivialkettle not easily. You could pass in your own wrapper to the request / response objects for your framework into the supertokens middleware by copying over our sdk's middleware into your own codebase.

I am thinking about creating a gRPC wrapper around supertokens to not have to use 2 different APIs since the legacy code base is based on gRPC

right yeaa.. this will be tricky for sure.

at the end I could use the low level backend functions to do this. But thats for the moment to much.

Yeaa. Agreed.