/caps
Find out a contacts, or room members client software capabilities. If in private chat initiated from a chat room, no parameter is required.
/caps
/caps <fulljid>|<nick>
<fulljid>
If in the console or a chat window, the full JID for which you wish to see capabilities.
<nick>
If in a chat room, nickname for which you wish to see capabilities.
/caps [email protected]/laptop
/caps [email protected]/phone
/caps aegir