title: Are there "events" that you can attach to in Facebook/Twitter
body: <p>I've been browsing the Facebook API for a way to attach to certain actions/events in Facebook.
  But up until now, I didn't find anything that would make sense except the Graph API to retrieve data afterwards.</p>
  
  <p>My goal is quite simple, so simple that I'm a bit confused why I can't find a solution.</p>
  
  <p>Every time when somebody likes or shares a post I posted on my facebook page, I would like to get a notification (in the form of a callback or something) which includes the post and the facebook user that liked or shared my post. </p>
  
  <p>I would like to have something similar when somebody retweets a tweet of mine.
  I haven't looked for a solution in Twitter yet, because the Facebook feature is much more important.</p>
  
  <p>Are there any apps/tools or sdk's that could help me achieve this?
  Can somebody point me in the right direction?</p>
  
  <p>Regards,
  Sven Peeters
  Belgium</p>