I'm planning to use Google Sites API - Revision Feed in order to check if a google site is updated.(what I mean by google site https://sites.google.com/site/username). Also I may use it in Laravel or WP. Do you have any other platform or way suggestion that will make it easier and more efficient?
I give a good gadget for that. "Subscribe to changes for Sites viewers"
I use this on my Google sites and it's really nice.
https://sites.google.com/site/scriptsexamples/available-web-apps/subscribe-to-changes-for-viewers