JSON-RPC implementation Below is a list of implementations, but it is many ways a bit dated. Please visit http://en.wikipedia.org/wiki/JSON-RPC#Implementations for a community updated list. JavaScript easyXDM is a library for cross-domain communication with a built in RPC feature. The library uses HTML5 postMessage when available, or FIM/window.name when not. Pmrpc is an inter-window cross-domain