Friends.get

• The Friends.get returns the identifiers of the current user's Facebook friends.
• You call it like:

http://api.facebook.com/restserver.php?method=Frients.get&api_key=YOURKEY
&session_key=YOURSK&call_id=123&sig=MD5HASH&v=1.0
&format=XML

• which will return something like:

<?xml version="1.0" encoding="UTF-8"?>
<friends_get_response xmlns="http://api.facebook.com/1.0/" 
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
   xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd" 
  list="true">  
  <uid>222333</uid>  
  <uid>1240079</uid> 
</friends_get_response>

• or, in JSON

[222333,1240079]