There is a page https://xmpp.org/registrar/formtypes.html It's Last Updated: 2009-04-06 so maybe it was outdated? It looks like it has all the FORM_TYPEs except of http://jabber.org/protocol/muc#request and http://jabber.org/protocol/muc#roominfo It also lacks of links to the mentioned XEPs. The ejabberd returns extra fields for the http://jabber.org/protocol/muc#roominfo: muc#roominfo_creationdate muc#roomconfig_allowinvites muc#roomconfig_changesubject muc#roomconfig_enablelogging muc#roomconfig_lang muc#roomconfig_maxusers muc#roomconfig_membersonly muc#roomconfig_moderatedroom muc#roomconfig_passwordprotectedroom muc#roomconfig_persistentroom muc#roomconfig_presencebroadcast All these fields are declared in the #roomconfig https://xmpp.org/extensions/xep-0045.html#registrar-formtype-owner But they aren't declared for the #roominfo Could you add them?