RFC 9421 Testing endpoints?

Is there a service or implementation that can test RFC 9421 implementations? I'm running a branch of NodeBB here on activitypub.space that sends and receives RFC 9421 HTTP Signatures and I'd like to test against someone

@silverpill@mitra.social perhaps?

Are you sending RFC 9421 first or cavage-12 draft first?

Also this is a test to confirm verification.

@mradcliffe@nokoto.org I am sending 9421 first, then cavage when it fails.

@julian Hmm, I think I must be failing your 9421 request. I think I will have to add logging back.

@mradcliffe@nokoto.org if your software is open, I (or rather, my local AI ) can do a deep dive.

@silverpill@mitra.social my laptop says the timeout is due to Mitra's 10s timeout (this may be incorrect), and to try again activitypub.space is slow, it's hit by many scrapers and a 10+s response is not out of the ordinary.