It doesn't have to support IDP functionality. I used https://github.com/inrupt/pod-server and deployed it to https://pod-server.herokuapp.com
I registered the user 'michiel-at-heroku' on https://inrupt.net, then used a private browsing tab to log in as that user
(so that it wouldn't log me in as my main https://michielbdejong.inrupt.net identity) and edited
https://michiel-at-heroku.inrupt.net/profile/card by adding three prefixes (pod:
, inbox:
and settings:
) and linking
to those: