@fabio @fabio Will it also work with profile parameter? We have specify profile because ActivityPub specification requires it:
The ActivityPub protocol is a decentralized social networking protocol based upon the [ActivityStreams] 2.0 data format. It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and content.
(www.w3.org)
If you investigate NodeBB's actors, all of their outboxes return an empty OrderedCollection because I simply haven't gotten around to it yet, and I don't know many implementations that read it.
I read from outboxes all the time. But I can't do that with NodeBB 
NodeBB version v4.4.2 NodeBB git hash No response NodeJS version No response Installed NodeBB plugins No response Database type No response Database version No response Exact steps to cause this issue Retrieve outbox What you expected I ...
GitHub (github.com)
@silverpill@mitra.social @fabio@manganiello.blog yes, I've just realized that luckily requests is smart enough to split header parameters 
❯ curl -I -H 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams' https://manganiello.blog/article/Madblog-federated-blogging-from-markdown
HTTP/2 200
server: nginx
date: Tue, 10 Mar 2026 18:43:44 GMT
content-type: application/activity+json
content-length: 69389
last-modified: Tue, 10 Mar 2026 18:39:54 GMT
etag: "81d02d339405c0ec"
cache-control: public, max-age=0, must-revalidate
language: en-US
@silverpill@mitra.social @fabio@manganiello.blog you're right, I completely overlooked that. Also the Python HTTP machinery isn't as clever as I thought so I had to trim parameters manually, but it should work now https://git.fabiomanganiello.com/blacklight/madblog/commit/76e7b72337b1ab7406fb307eb163a9a4097fcc0e
❯ curl -I -H 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"' https://manganiello.blog/article/Madblog-federated-blogging-from-markdown
HTTP/2 200
server: nginx
date: Tue, 10 Mar 2026 19:06:01 GMT
content-type: application/activity+json
content-length: 69389
last-modified: Tue, 10 Mar 2026 18:39:54 GMT
etag: "81d02d339405c0ec"
cache-control: public, max-age=0, must-revalidate
language: en-US
@silverpill@mitra.social I recall Mitra may be one of a select few 
Do you use it to backfill a profile? How often do you query the outbox?
@julian Yes, to backfill a profile. It is a manual action.
I don't know who else does that, but @jonny is working on a adding automatic profile backfill to Mastodon: https://github.com/mastodon/mastodon/pull/34597
@silverpill @julian@activitypub.space I believe @hollo does it as well.
@fabio I really, really love it!! I wanted to do the same for quite a long time - but I didn't; and now maybe I can eventually steal your code and RIIR in glorious AGPL!
That said, unfortunately at the moment it's not working for me, I can't open it either in my client, or through my instance's search FWIW, through my instance I'm seeing some "503 Remote SSL certificate could not be verified", while the client just spins a throbber endlessly. No idea where the fault lies, but I do remember reading many times that Mastodon is a flustercluck and a fishy citizen in ActivityPub 
...
Anyway, huge applause from me regardless, and hopefully one day I can get to fave the actual post on the blog!
@fabio@manganiello.eu @fabio@manganiello.blog @blog omg thank you for the python lib. i was getting ready to write one but extremely good to see i can draw from (credit/depend on/etc.) prior art. adding to the inspo docs!!!
@silverpill @julian @general Collections are one of the best parts of activitypub/streams and i have no idea why nobody uses them or works on them. like if we embraced the underlying graph structure of the data and used the canonicalization algos that have been developed in the meantime we get all the good parts of atproto (mostly efficient updating the pds system) basically for free
@silverpill @julian @general account backfilling is issue number THIRTY FOUR in mastodon and has >700 thumbs, >200 comments hemming and hawing about how possible it would be for TEN YEARS.
the solution is just "enumerate the outbox" and it's 200 lines.
like we already have a mechanism for reply controls: the reply collection.
for fine-grained post visibility: access control on the outbox collection.
broadcasting feeds and posts between instances: collections
migrations: collections
store and forward, offline-focused AP: collections
and so on.
@julian @silverpill ActivityPub API clients dont need their server to backfill thanks to proxyURL, but Actors will look like they haven’t posted
@django@social.coop sounds like I'll have to implement it sooner rather than later!
i have no idea why nobody uses them or works on them
There is a FEP in the works:
@akavel@merveilles.town thanks for your response
Did you manage to get to the bottom of it? From the description of the error it sounds like your certificate may be broken? Can you access the blog index from a normal browser? Do you perhaps have a split-domain situation (link != activitypub_link) but the certificate only applies to one?
@julian@fietkau.social @liaizon@wake.st it's all live, let me know if it works
@fabio I didn't investigate further as I had no idea how.
Which link specifically do you mean by "blog index"?
As to domain/instance I mean this one I'm writing from - I don't control it, sorry I see I wrote it in a confusing way, I'm just a plain citizen here.
Seeing you mention certs I will try on a laptop then, not on phone, to compare. Or could it be that the instance I'm on has some certs problems internally? 
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