Also made a webfinger lookup resolver that works with my own webfinger endpoint as well as yarnd servers: http://darch.dk/wf-lookup.php

Thanks @prologic, I also just manage to get my own version of webmentions working. Please have a read at Webmentions vs. Custom Mentions Spec for Twtxt/Yarn - HedgeDoc and User Lookup for Twtxt/Yarn - Webfinger or Decentralized Identifiers (DIDs) - HedgeDoc for how it sorta works