# \#activitypub **URL:** https://meta.discourse.org/tag/activitypub/803.md [Latest](https://meta.discourse.org/latest.md) · [Categories](https://meta.discourse.org/categories.md) · [Tags](https://meta.discourse.org/tags.md) --- ## [Discourse Activitypub gives 502 after rebuilding](https://meta.discourse.org/t/discourse-activitypub-gives-502-after-rebuilding/412982)
**Author:** [@Jagster](https://meta.discourse.org/u/Jagster)\ **Replies:** 5\ **Last updated:** [September 22, 2026, 2:53pm UTC](https://meta.discourse.org/t/discourse-activitypub-gives-502-after-rebuilding/412982 "2026-09-22T14:53:39Z")
Self hosted 2-container, and when rebuilded today (latest) Activitypub makes error 502. Commenting it out from web\_only.yml helps. --- ## [ActivityPub Plugin](https://meta.discourse.org/t/activitypub-plugin/266794)
**Author:** [@angus](https://meta.discourse.org/u/angus)\ **Replies:** 479\ **Last updated:** [September 19, 2026, 4:50am UTC](https://meta.discourse.org/t/activitypub-plugin/266794 "2026-09-19T04:50:04Z")
:discourse2: Summary Discourse ActivityPub allows you to publish Discourse posts via ActivityPub so they can be read on services that support ActivityPub such as Mastodon. :hammer\_and\_wrench: Repository Link … --- ## [Activitypub and changed domains](https://meta.discourse.org/t/activitypub-and-changed-domains/408845)
**Author:** [@yaxu](https://meta.discourse.org/u/yaxu)\ **Replies:** 2\ **Last updated:** [August 1, 2026, 4:22pm UTC](https://meta.discourse.org/t/activitypub-and-changed-domains/408845 "2026-08-01T16:22:33Z")
I don’t seem to be picking up activitypub posts from any of my mastodon/fediverse accounts any more. I moved my forum from https://club.tidalcycles.org/ to https://uzu.lurk.org/ , and think this might well be the cause.… --- ## [ActivityPub full topic replies not appearing on Mastodon](https://meta.discourse.org/t/activitypub-full-topic-replies-not-appearing-on-mastodon/407571)
**Author:** [@Don](https://meta.discourse.org/u/Don)\ **Replies:** 0\ **Last updated:** [July 14, 2026, 12:43pm UTC](https://meta.discourse.org/t/activitypub-full-topic-replies-not-appearing-on-mastodon/407571 "2026-07-14T12:43:54Z")
Hello :waving\_hand: Discourse ForumHelperBot helps me to investigate the issue. :down\_arrow: Publication type: Full Topic Post object type: Note Topic first post federates correctly to Mastodon :white\_check\_mark: Re… --- ## ["\[event\]" syntax reproduced in ActivityPub federated posts](https://meta.discourse.org/t/event-syntax-reproduced-in-activitypub-federated-posts/364735)
**Author:** [@icaria36](https://meta.discourse.org/u/icaria36)\ **Replies:** 3\ **Last updated:** [June 10, 2026, 6:38pm UTC](https://meta.discourse.org/t/event-syntax-reproduced-in-activitypub-federated-posts/364735 "2026-06-10T18:38:17Z")
\[event\] syntax is reproduced verbatim in ActivityPub federated posts, and it looks really bad. Ideally, the basic event data would be displayed. If not, then al the content between the brackets should be removed. See a… --- ## [Public list of current activitypub handle addresses](https://meta.discourse.org/t/public-list-of-current-activitypub-handle-addresses/403769)
**Author:** [@Thomas\_Rother](https://meta.discourse.org/u/Thomas_Rother)\ **Replies:** 1\ **Last updated:** [May 28, 2026, 12:01pm UTC](https://meta.discourse.org/t/public-list-of-current-activitypub-handle-addresses/403769 "2026-05-28T12:01:05Z")
We have a website which lists the currently federated categories of the local Discourse instance at forum.netzwissen.de. This is done with a a static table. I was looking for a dynamic page instead which could be linked… --- ## [Incorrect AP handler addresses](https://meta.discourse.org/t/incorrect-ap-handler-addresses/402848)
**Author:** [@Thomas\_Rother](https://meta.discourse.org/u/Thomas_Rother)\ **Replies:** 0\ **Last updated:** [May 13, 2026, 7:21am UTC](https://meta.discourse.org/t/incorrect-ap-handler-addresses/402848 "2026-05-13T07:21:06Z")
Small bug in the activity pub overview page at https://\[example.com\]/ap/about The window shows incorrect AP handler addresses wrong esslingen@forum.netzwissen.de correct @esslingen@forum.netzwissen.de The address sho… --- ## [I cannot connect Mastodon AP](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803)
**Author:** [@roke\_julian\_lockhart](https://meta.discourse.org/u/roke_julian_lockhart)\ **Replies:** 4\ **Last updated:** [March 23, 2026, 10:14pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803 "2026-03-23T22:14:26Z")
When I attempt to connect to //mastodon.social/oauth/authorize, I observe: The requested scope is invalid, unknown, or malformed. To demonstrate: --- ## [I cannot connect to Discourse AP](https://meta.discourse.org/t/i-cannot-connect-to-discourse-ap/399066)
**Author:** [@roke\_julian\_lockhart](https://meta.discourse.org/u/roke_julian_lockhart)\ **Replies:** 3\ **Last updated:** [March 23, 2026, 6:19pm UTC](https://meta.discourse.org/t/i-cannot-connect-to-discourse-ap/399066 "2026-03-23T18:19:07Z")
When I attempt to connect to discuss.privacyguides.net, which was previously authorised: …or socialhub.activitypub.rocks, I observe: An error occurred: Failed to verify client. Please try to verify again. The way… --- ## [ActivityPub publish using original language but uses English for linking](https://meta.discourse.org/t/activitypub-publish-using-original-language-but-uses-english-for-linking/398996)
**Author:** [@Jagster](https://meta.discourse.org/u/Jagster)\ **Replies:** 0\ **Last updated:** [March 22, 2026, 7:32am UTC](https://meta.discourse.org/t/activitypub-publish-using-original-language-but-uses-english-for-linking/398996 "2026-03-22T07:32:39Z")
An image explains better: Yes, I’m using AI translations. And the default for the forum is Finnish, as my user’s. The expectation is default language of forum, because federation doesn’t know what language is in use… --- ## [Federation doesn’t respect anonymous mode](https://meta.discourse.org/t/federation-doesn-t-respect-anonymous-mode/398961)
**Author:** [@Jagster](https://meta.discourse.org/u/Jagster)\ **Replies:** 0\ **Last updated:** [March 21, 2026, 11:42am UTC](https://meta.discourse.org/t/federation-doesn-t-respect-anonymous-mode/398961 "2026-03-21T11:42:43Z")
ActivityPub sends same post twice when an anon is writer. One as @anon…@forum or what ever style forum uses, and one using actual name like @doe@forum. Is that expected? Because when a user uses anon mode that user wants… --- ## [ActivityPub: no user-agent sent with request Failure while creating client](https://meta.discourse.org/t/activitypub-no-user-agent-sent-with-request-failure-while-creating-client/391245)
**Author:** [@ayr-ton](https://meta.discourse.org/u/ayr-ton)\ **Replies:** 9\ **Last updated:** [March 18, 2026, 4:05am UTC](https://meta.discourse.org/t/activitypub-no-user-agent-sent-with-request-failure-while-creating-client/391245 "2026-03-18T04:05:51Z")
Hey there, I’m experiencing issues when trying to communicate with some Mastodon instances. Seems that many admins have a config requirement to only interact with apps/servers that provide user-agent, which I can see t… --- ## [Quote Boost support?](https://meta.discourse.org/t/quote-boost-support/397569)
**Author:** [@rw\_grim](https://meta.discourse.org/u/rw_grim)\ **Replies:** 4\ **Last updated:** [March 5, 2026, 10:44pm UTC](https://meta.discourse.org/t/quote-boost-support/397569 "2026-03-05T22:44:44Z")
Awhile ago Mastodon added support for quoting boosts. I’ve looked around in the actor settings and didn’t see anything to enable it? Is there support for this and did I just miss it? Here’s a screenshot of one of the po… --- ## [Load average ×2 since last upgrade](https://meta.discourse.org/t/load-average-x2-since-last-upgrade/391603)
**Author:** [@Julien\_Palard](https://meta.discourse.org/u/Julien_Palard)\ **Replies:** 5\ **Last updated:** [December 22, 2025, 7:14pm UTC](https://meta.discourse.org/t/load-average-x2-since-last-upgrade/391603 "2025-12-22T19:14:28Z")
I upgraded to 2025.12.0-latest from a release that was not calver yet (how to know exactly? I don’t remember the version). So yes I skipped over 2025.11 (was not proposed by the Discourse upgrade page), maybe a bug due … --- ## [Handling plural forms in activity pub localization strings](https://meta.discourse.org/t/handling-plural-forms-in-activity-pub-localization-strings/363687)
**Author:** [@Moin](https://meta.discourse.org/u/Moin)\ **Replies:** 11\ **Last updated:** [November 4, 2025, 1:48pm UTC](https://meta.discourse.org/t/handling-plural-forms-in-activity-pub-localization-strings/363687 "2025-11-04T13:48:47Z")
I noticed some strings in the ActivityPub plugin that, in my opinion, need pluralization. The first post of a new topic will be published %{delay\_minutes} minutes after being posted discourse-activity-pub/config/locales… --- ## [Topic published on 'Invalid date' with ActivityPub](https://meta.discourse.org/t/topic-published-on-invalid-date-with-activitypub/360228)
**Author:** [@NateDhaliwal](https://meta.discourse.org/u/NateDhaliwal)\ **Replies:** 6\ **Last updated:** [August 29, 2025, 7:38am UTC](https://meta.discourse.org/t/topic-published-on-invalid-date-with-activitypub/360228 "2025-08-29T07:38:39Z")
In that topic, the topic says ‘Topic was published via ActivityPub on Invalid date’. See this screenshot: --- ## [Quoting in federated posts](https://meta.discourse.org/t/quoting-in-federated-posts/369679)
**Author:** [@Jagster](https://meta.discourse.org/u/Jagster)\ **Replies:** 4\ **Last updated:** [August 23, 2025, 5:44am UTC](https://meta.discourse.org/t/quoting-in-federated-posts/369679 "2025-08-23T05:44:34Z")
I understand why HTMl-tags and markdown are stripped away (yet one claim about markdown is it readibility :smirking\_face:). Mastodon can’t show either ones. But would there be possibility to show at least quotes with \>?… --- ## [Help needed to control flow and look of activitypub](https://meta.discourse.org/t/help-needed-to-control-flow-and-look-of-activitypub/378730)
**Author:** [@SIXGUNS](https://meta.discourse.org/u/SIXGUNS)\ **Replies:** 3\ **Last updated:** [August 19, 2025, 3:40pm UTC](https://meta.discourse.org/t/help-needed-to-control-flow-and-look-of-activitypub/378730 "2025-08-19T15:40:59Z")
Love the fediverse integration but it’s heavy for older users, I need to tone it down and make it look better To test the water I selected just a few people to follow, it flooded my forum, I reduced to one for now To b… --- ## [Improve following of Discourse categories on the fediverse](https://meta.discourse.org/t/improve-following-of-discourse-categories-on-the-fediverse/377320)
**Author:** [@aschrijver1](https://meta.discourse.org/u/aschrijver1)\ **Replies:** 5\ **Last updated:** [August 15, 2025, 10:25am UTC](https://meta.discourse.org/t/improve-following-of-discourse-categories-on-the-fediverse/377320 "2025-08-15T10:25:29Z")
Taking the opportunity to pass some feedback regarding the AP plugin into this federated category.. A post by @jdp23: Final thoughts re: FediCon 2025Yeah. I have no idea how to follow SocialHub discussions Mastodon accou… --- ## [Hopping on an existing conversation](https://meta.discourse.org/t/hopping-on-an-existing-conversation/378665)
**Author:** [@how](https://meta.discourse.org/u/how)\ **Replies:** 0\ **Last updated:** [August 14, 2025, 11:07pm UTC](https://meta.discourse.org/t/hopping-on-an-existing-conversation/378665 "2025-08-14T23:07:21Z")
Continuing the discussion from Fediverse Report – #129: @angus is there a way to capture an existing discussion on the Fediverse into a Discourse topic? That would be so useful, especially when stumbling upon a related d… --- ## [AP processing dragging forum down?](https://meta.discourse.org/t/ap-processing-dragging-forum-down/374033)
**Author:** [@aschrijver1](https://meta.discourse.org/u/aschrijver1)\ **Replies:** 12\ **Last updated:** [August 14, 2025, 1:55pm UTC](https://meta.discourse.org/t/ap-processing-dragging-forum-down/374033 "2025-08-14T13:55:29Z")
Hi @angus, I can't be certain about what is actually happening, which needs an admin and knowledgeable person with the ActivityPub plugin, but I observe that this forum becomes slow or even unreachable at times and it lo… --- ## [500 error when adding a Language Tag (Multilingual Plugin) to a user's post](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964)
**Author:** [@joshhabka](https://meta.discourse.org/u/joshhabka)\ **Replies:** 8\ **Last updated:** [August 4, 2025, 2:45pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964 "2025-08-04T14:45:32Z")
I have both the Multilingual and Discourse Translator plugins installed. I tried to go to someone’s post, click edit, and add a language tag(as when someone sets their user language preferences, no posts show(unless expl… --- ## [Error when I try to remove or change a reaction](https://meta.discourse.org/t/error-when-i-try-to-remove-or-change-a-reaction/375570)
**Author:** [@Moin](https://meta.discourse.org/u/Moin)\ **Replies:** 9\ **Last updated:** [August 4, 2025, 2:27pm UTC](https://meta.discourse.org/t/error-when-i-try-to-remove-or-change-a-reaction/375570 "2025-08-04T14:27:30Z")
I cannot remove my :heart: reaction or choose a different reaction on AI helper does not always use user's locale - #6 by sam --- ## [Feature Req: ActivityPub notifications from read-only categiories](https://meta.discourse.org/t/feature-req-activitypub-notifications-from-read-only-categiories/376377)
**Author:** [@Thomas\_Rother](https://meta.discourse.org/u/Thomas_Rother)\ **Replies:** 0\ **Last updated:** [July 29, 2025, 9:29am UTC](https://meta.discourse.org/t/feature-req-activitypub-notifications-from-read-only-categiories/376377 "2025-07-29T09:29:17Z")
The publication of notifications from a category into the Fediverse should be possible for categories which are “read only”. In this context, the use-case behind is to to have a publicly available documentation area and … --- ## [Incoming synchronization between Fediverse publications and Discourse category?](https://meta.discourse.org/t/incoming-synchronization-between-fediverse-publications-and-discourse-category/375669)
**Author:** [@Thomas\_Rother](https://meta.discourse.org/u/Thomas_Rother)\ **Replies:** 2\ **Last updated:** [July 28, 2025, 7:49am UTC](https://meta.discourse.org/t/incoming-synchronization-between-fediverse-publications-and-discourse-category/375669 "2025-07-28T07:49:47Z")
We currently have a good connection between publications inside of a discourse category and the publication on the Fediverse, thanks to the great work of @angus with the ActivityPub Plugin Moreover, there is a already a … --- ## [WebFinger support for particular topics](https://meta.discourse.org/t/webfinger-support-for-particular-topics/374534)
**Author:** [@kuba-orlik](https://meta.discourse.org/u/kuba-orlik)\ **Replies:** 0\ **Last updated:** [July 16, 2025, 7:08pm UTC](https://meta.discourse.org/t/webfinger-support-for-particular-topics/374534 "2025-07-16T19:08:22Z")
We have a Discourse topic published on Discourse: https://forum.internet-czas-dzialac.pl/t/selfhosting-temat-zbiorczy/2856 With many fediverse apps, if I’d like to boost this topic from my Mastodon account, I can just … --- ## [Error in changing topic owner](https://meta.discourse.org/t/error-in-changing-topic-owner/373203)
**Author:** [@patrickemin](https://meta.discourse.org/u/patrickemin)\ **Replies:** 10\ **Last updated:** [July 7, 2025, 8:29pm UTC](https://meta.discourse.org/t/error-in-changing-topic-owner/373203 "2025-07-07T20:29:07Z")
Hello, a member recently registered on my site. I had published some of his YouTube videos under my name, and now I would like to change the owner of these topics to his name. Unfortunately, I am getting an ownership att… --- ## [Forum federation thread on the.socialmusic.network](https://meta.discourse.org/t/forum-federation-thread-on-the-socialmusic-network/370991)
**Author:** [@strypey](https://meta.discourse.org/u/strypey)\ **Replies:** 22\ **Last updated:** [July 5, 2025, 11:49pm UTC](https://meta.discourse.org/t/forum-federation-thread-on-the-socialmusic-network/370991 "2025-07-05T23:49:33Z")
Ping @angus, thought it might be useful to you to read the experiences of a bunch of fediverse newbies with a Discourse instance, trying to get their heads around how to use the AP federation features; https://the.social… --- ## [Some federated posts are not displayed for the following actor](https://meta.discourse.org/t/some-federated-posts-are-not-displayed-for-the-following-actor/372876)
**Author:** [@eve](https://meta.discourse.org/u/eve)\ **Replies:** 0\ **Last updated:** [July 4, 2025, 5:52am UTC](https://meta.discourse.org/t/some-federated-posts-are-not-displayed-for-the-following-actor/372876 "2025-07-04T05:52:38Z")
We have set up a tag actor on one Discourse and a category actor on a second Discourse, who follows the tag actor on the first. Unfortunately, not all posts of Hello bibcourse.eu - Meta - metadaten.community are display… --- ## [Publishing posts to Mastodon](https://meta.discourse.org/t/publishing-posts-to-mastodon/314609)
**Author:** [@angus](https://meta.discourse.org/u/angus)\ **Replies:** 19\ **Last updated:** [July 3, 2025, 7:46am UTC](https://meta.discourse.org/t/publishing-posts-to-mastodon/314609 "2025-07-03T07:46:14Z")
This topic covers publishing posts from Discourse to Mastodon with the Discourse ActivityPub Plugin, and follows on from Setting up an ActivityPub Actor and Following an ActivityPub Actor. If you’re not sure what this me… [Next page](https://meta.discourse.org/tag/activitypub/803.md?match_all_tags=true&page=1&tags%5B%5D=activitypub)