HTTP/Json interface: Any way to register functions?

[obadz]

Is there a way to register functions via the HTTP/Json interface?

If not, that would be a super useful feature to add. Maybe the addin could get "$server/FunctionRegistrations" and all the function signatures would be downloaded in a Json structure..

Second question, is the binary communication protocol documented anywhere?

Finally, has anyone measured/observed the performance difference between binary and HTTP/Json?