问题
How I can accept or decline friend requests of other users via Graph API
回答1:
You can read friend requests by looking at the friend_request table with FQL and the "read_requests" extended permission. The public API does not support managing those (accepting/denying). There may be a way if you get whitelisted somehow and get access to undocumented API's, but this is pure speculation.
来源：https://stackoverflow.com/questions/7324246/accept-or-decline-friend-request-using-fb-graph-api