How to programmatically invite Facebook friends on a website

Question

The functionality that I need is to show a list of Facebook friends to the user on the website page with custom design, where the user can select some of them and send invites.<

Answer 1

You are not allowed to use taggable_friends for inviting them, obviously it is for TAGGING friends and you only get a tagging token.

There is invitable_friends, but:

The invitable_friends API is only available for games that have a Facebook Canvas app implementation using version 2.0 of the Graph API.

(https://developers.facebook.com/docs/games/invitable-friends/v2.1)

I am afraid what you want to achieve is not possible. The proper way to invite friends to your website is to use the Send Dialog: https://developers.facebook.com/docs/sharing/reference/send-dialog

You can include one User ID in the "to" parameter. Of course it must be a User who authorized your App too, you can get those with /me/friends. Or better: Just open the Dialog and let the User select on his own.