2017-11-29 UTC
# 
@martijnvdven @sil @charlesroper @dracos http://IndieAuth.com implements http://microformats.org/wiki/relmeauth and requires those links, so no, it can't be used in the way you describe.
You'd want http://IndieAuth.com without the rel="me" requirement: a service for webapps to talk to that handles all the different OAuths. (twitter.com/_/status/935858114133483520)