Currently, you can find the endpoints that are not implemented in the module docstring of http.py. I find it not very realistic for users of the server to find it there.
I propose that we create a prominent warning in the server README.md, that not all endpoints of the API specification are implemented yet, together with a list of the not implemented ones.
This issue was found due to a question in rwth-iat/aas-python-http-client#20.