I've tried it many times, but it seems impossible.
The reason is simple: the remote script checks the Headers
so you can't send data from another server.
Take a look at Meteoro.
A Pomodoro app built with Meteor.
For those who like to work on their productivity.
If you're into Django, feel free to mess with AgriCatch, the engine I've built for Berlin On Feier (events app) that grew well beyond the app, into a general data aggregation library.