[throwaway4good]

Just be clear - I am not suggesting JSON-RPC as there is no envelope and the name of the invoked procedure is in the HTTP request line.

For example:

   POST /api/listPosts HTTP/1.1
   { userId: "banana", fromDate: 2342342342, toDate: 2343242 }

Reponse:

   HTTP/1.1 200 OK
   [ { id: 32432, title: "Happy banana", userId: "banana" }, ... ]

Or in case of an error:

   HTTP/1.1 500 Internal Server Error
   { type: "class name of exception raised server side", message: "Out of bananas" }

The types can be specified with TypeScript needed.

[throwaway4good]

The point is to get free of resource modelling paradigm, the meaning of various http methods, and potential caching. And also not have the silly overhead of JSON-RPC.