How to document API, client and server communication?

Question

API

There is a problem with the documentation of client-server requests, namely with the fact that certain keys stand for.
Since changes occur in the project more often than you have time to open a text editor, the problem of versioning client-server REST requests arises. New keys are constantly added, old ones go away. And after a week you forget what's what.
We started using jsDoc (server on NodeJS), but maybe there is some special thing that would cling to the network, sniff the keys and offer a description?

Answer 1

raml.org

Answer 2

Hardly suitable for a project with an existing API, but may be useful for the future - graphql.org (documentation is automatic)