Hi, a little more information would be helpful.
When you are talking about "Services", you mean GRPC-Services? What programming-language are you using? And by APIs you mean the generated files/classes?
What do you want your generated classes to be called instead? What I can think of (for java at least) would be "option java_multiple_files = true;"
This will create one Class per Message/Service instead of one for the whole Proto-File.