Jabber Web Presence shows the online status (e.g. “online”, “offline”, “not available”) on the internet, for example on a website. This is often used to show the status in a web based contact form.
The URL looks like this:
https://jabber.hot-chilli.net/status/username@jabberdomain.tld
For example:
https://jabber.hot-chilli.net/status/roi@jabber.hot-chilli.net