...
The Response is also expressed as a single JSON object, with the following members:
error
A Number that indicates the return code, a return code of zero means a successful operation, and non-zero means some errors occurred. This MUST be an integer.
message
A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.
result
The value returned by the method. Its contents is entirely defined by the method.This member may be entirely omitted if there was an error invoking the procedure.
When a method call fails, this value contains additional information, may be omitted. Its content is entirely defined by the application (e.g. detailed error information, nested errors etc.).
Examples
Failure:
{"error":101, "message":"user not found."}
Success with no result:
{"error":0}
Success with result:
{
"error":0,
"result":{"username":"john.smith", "email":"john.smith@acme.com"}
}