Thanks for reporting back, @Saturas! The spicedb should have a shell (it's based on alpine) but somehow something is not quite right there. I built the image locally and was able to get a shell. Also FYI comes with https://github.com/grpc-ecosystem/grpc-health-probe, which comes handy when you don't have the HTTP gateway enabled. e.g.

grpc-health-probe -v -addr localhost:50051