I am able to post to a users feed using a URL from my app, for example:
https://graph.facebook.com/USER_ID/feed?
link=https://developers.facebook.com/docs/reference/dialogs/&
picture=http://fbrell.com/f8.jpg&
name=Facebook%20Dialogs&
caption=Reference%20Documentation&
description=Using%20Dialogs%20to%20interact%20with%20users.&
message=Facebook%20Dialogs%20are%20so%20easy!
According to the documentation here: https://developers.facebook.com/docs/reference/dialogs/feed/ it is possible to add “actions” which appear next to the Like and Comment buttons under each post. The documentation states the actions must be in a JSON format with object with keys name and link
Well, you could add actions parameter. If in PHP then you could do like:
Did you mean something like that.
Hope it helps