If cross domain ajax calls are not allowed then how are you supposed to use the google spreadsheet API

Question

If cross domain ajax calls are not allowed then how are you supposed to do this? Note: obsoleted link. Question updated with relevant section from original page in quest

Answer 1

Cross domain ajax restrictions are only a browser restriction. If you make a webservice call from the server or another application, you won't be restricted. If you need to do an ajax call though, you could proxy the call through your server.