It is already possible to get all actions for custom app actions and objects:
https://graph.facebook.com/me/{appNameSpace}:{action}/{object}
This will list all the actions generated by an app, but only for a given user...
How do I get all the actions generated by an app (for all its users)? I've tried this request with an app access token :
https://graph.facebook.com/{appId}/{appNameSpace}:{action}/{object}
But it does not work...
I was also looking for an activities or actions FQL table, since each action has an id, they should be accessible somewhere.
Any suggestions?