Proxies IndieAuth authorization requests to one's OpenID server.
Lets you login with your OpenID server to indieauth sites.
Indieweb enthusiasts currently using it on their own site:
To use your OpenID to sign into IndieAuth enabled websites, add the following to your Homepage:
<link rel="authorization_endpoint" href="http://indieauth.id.cweiske.de/" />
If you run your own indieauth-openid proxy, use its address.