Some XEPs soprani.ca features tend to rely on:
- https://xmpp.org/extensions/xep-0184.html
- https://xmpp.org/extensions/xep-0234.html
- https://xmpp.org/extensions/xep-0261.html
- https://xmpp.org/extensions/xep-0100.html (especially jabber:iq:gateway)
- https://xmpp.org/extensions/xep-0066.html#x-oob
- https://xmpp.org/extensions/xep-0050.html
- https://xmpp.org/extensions/xep-0030.html