@prologic@twtxt.net Try hitting this URL:

https://twtxt.net/external?nick=nosuchuser&uri=https://foo.com

Change nosuchuser to any phrase at all.

If you hit https://twtxt.net/external?nick=nosuchuser , you’re given an error. If you hit that URL above with the uri parameter, you can a legitimate-looking page. I think that is a bug.