Question

How can I access the basic information of a user without using authentication mechanism (no access token). Either graph api or by using FQL, doesn’t matter.

Flow of the program:

• the client logs into the system
• enters a facebook id in a text field
• hits submit
• system returns the basic information, no authentication is being done

Answer 1

you can not do that. Basic information about a user needs authentication.

The only action you can do without authentication is retrieving public information – however this is limited to the privacy settings for each user – ie. it depends on what information the user has made public.