user_id requiredThe XMPP/Jabber address (JID) to build the badge for, e.g. someone@jabber.example.org. When empty the whole command expands to an empty string, so it is effectively required. The value is placed verbatim into both the xmpp: link and the status-image URL.
action optional default callAccepted for backward compatibility but NOT used by the current implementation - the code never reads it (a copy-paste leftover from the sibling ICQ and Yahoo status commands, where action is the click verb). Passing any value changes nothing in the output.
style optional default 0Selects the badge size/icon variant by choosing the service port: the image is fetched from www.the-server.net on port 800 followed by this digit, so 0 uses port 8000, 1 uses 8001, and so on. The value is cast to an integer; non-numeric input becomes 0.
[{jabber:}]
{jabber:someone@jabber.example.org}
{jabber:someone@jabber.example.org:call:1}
{jabber:someone@jabber.example.org:anything}