Huh. #Patreon is serving me a "403: Forbidden" error in response to my trying to wget the public (unauthenticated!) API page for my account from my server (part of a cron job script, but also tested manually at the command line, which is how I found out about the 403), even while serving it to me just fine in the browser. Yes, even while not logged in.
This change started sometime in the last ~28 hours. Script ran fine at 03:08:00+0100 yesterday.
I filed a support request, but Patreon has largely disavowed their API. Poot.