@jgmac1106 @benwerd I would want something I can use with gRSShopper. Eg., I could post requirements from gRSShopper, receive webmention for evidence, and publish a badge and send webmention to issue the badge.

But thisn't jut for m - it needs to be easy to set up for anyone using gRSShopper. So many APIs are based on a specific website or service (you need to register your specific website to get an API key), rather than (as Maston's is) based on the user.