filtering facebook friends by age

Say I have an authenticated facebook user and I want to present a list of their friends that only includes friends who are ages 21+.. is this possible with any of the APIs ou开发者_高级运维t there? I don't need the exact age of the user, just if they are over 21.

You can't do this unless facebook opens everybody's account and allow you to watch all their details, including age.

The best you can do is ask for the scope/permission that lets you see friends birthdays and filter out anyone who doesn't have a public birthday. This is how we did it.