title: Sharing Facebook Access Tokens Across Apps
body: <p>I want to provide a service using the facebook api to third parties.  Is it possible for us to share access tokens?  If the third party gives my service a user's access token, can I access that users data even if my app_id &amp; secret do not match the app that requested it?</p>
  
  <p>Should I have the users go through a separate oauth flow on my site even if they have already completed it for the other third party?</p>
  
  <p>Thanks.</p>
  
  <p>-ken</p>