Is it possible to LIKE a Facebook Page via the Open Graph API?
Maybe POST to "http://graph.facebook.com/#{FB_PAGE_ID}/likes ???
This is the only thing I could find in the API about creating a LIKE:
/POST_ID/likes like the given post none
Actually, it's not possible. You can not like pages. Check this: 'Like' a page using Facebook Graph API . I had to use a website to do like a page.
The error I always got was something about permission whitelist. It seems that this specific function is only available for specific apps.
At the top of my head, I think you can get a edge create notification with the javascrip sdk that you can use as callback for adding a fb page
You are correct. You need to retrieve the unique identifier of the page/photo/post/etc. you wish to like, then make a POST request to https://graph.facebook.com/<IDENTIFIER>/likes.
Check out this page of the Facebook Developers documentation, under the subheading "Publishing".
来源：https://stackoverflow.com/questions/4379092/is-it-possible-to-like-a-facebook-page-via-the-api