/REQUEST last|ping|time|vcard|version [jid]

Send a "IQ" query to the current buddy, or to the specified Jabber user.  If the resource is not provided with the jid, mcabber will send the query to all known resources for this user.

/request last
 Request "last" information (usually idle time)
/request ping
 Send an XMPP Ping request.  Note that you should use the full JID since a ping sent to a bare JID will be handled by the server.
/request time
 Request time from the buddy
/request vcard
 Request VCard from the buddy
/request version
 Request version from the buddy