This quest to discover XEP-0404 (Mediated Information eXchange (MIX): JID Hidden Channels.) was automagically added, to fulfill the quest at Discover XEPs. As of 2018-06-06 the status of this Standards Track XEP is Experimental. What does that even mean?! Check it out at XEP-0404: Mediated Information eXchange (MIX): JID Hidden Channels. 