Hi PerplexedCow66

I would like to know how to serve a model, even if I do not use any serving engine

What do you mean no serving engine, i.e. custom code?

Besides that, how can I manage authorization between multiple endpoints?

Are you referring to limiting access to all the endpoints?

How can I manage API keys to control who can access my endpoints?

Just to be clear, accessing the endpoints has nothing to do with the clearml-server credentials, so are you asking how to add access control over RestAPI ?