Until recently, I could still wriggle my way through Standard.site with my rather lazy numeric TID. I'd taken the easy route and simply used the blog post's incrementing ID.
But it seems the AT Protocol is now being taken a little more seriously, and my latest posts were rejected. Rightly so, I know! So I tweaked io-atmosphere a bit and now generate a proper one.
I generate it myself, though, rather than asking the server. That was more faff than I fancied on a Saturday evening!