[LoSboccacc]

nothing wrong with a good well documented json rpc over http

the main difference is endpoint negotiation vs object state transfer - consider an account representation - if you can withdraw, the link to perform the withdraw operation is there in the server response. if you can't, the link to the withdraw operation is not there. this is how the returned value convey the object state and how it let client explore object operarions.

say, it's the difference between returning an object instead of a struct, and it's also why json alone is not compatible with rest, there's not an agreed schema to identify operations coming along with the data so that a client can actionit - json-ld and hal can, if you reallyhate the idea of xml tho.