@steve @eblu

There are a couple of projects that explore #ActivityPub in its intended #LinkedData format. Plain JSON is allowed, but the AP's primary notation is using #JSONLD. I think there is a slight uptick in interest for this approach again, coming along with the opportunity to implement the Social API (client-to-server) as intended.

What I really like is that ecosystem tools which aim to ease #fediverse solution development, are gaining an interest. Most notably here is #Fedify imho, who recently received #NLnet funding to build Fedify Studio development platform..

https://studio.fedify.dev

DrFed — The ActivityPub debugging platform

DrFed is a web-based platform for developing and debugging ActivityPub implementations, built by the team behind Fedify.

DrFed

@fedify

Congratulations!

I am really delighted with @nlnet decision to select @drfed for an #NGI0 grant. Having good quality developer tools for creating #ActivityPub based solutions is so important for a healthy #fediverse developer ecosystem.

To anyone reading, bookmark the website..

Fedify Studio is focused on alleviating the most pressing issue of "Why is ActivityPub development so frustratingly hard?" that makes it unattractive for newcomers to adopt the technology. And addresses topics of:

- Protocol complexity
- #Interoperability hell
- Debugging nightmare
- Limited visibility

#Fedify from the very start has paid attention to ease of use for fediverse solution developers, not just by their library codebase, but with comprehensive documentation and tools to guide people along. Kudos here to @hongminhee who started this great initiative!

DrFed is our sister project, built alongside #Fedify to tackle the debugging side of #ActivityPub development. It just received @nlnet funding and now has its own account here: @drfed.

#DrFed #fedidev #fediverse #NLnet

RE: https://hackers.pub/@drfed/019ed3c9-7e8c-782f-a512-5fbc75a4610b

Some of you have already heard of us as #Fedify Studio. We now have a proper name: DrFed, short for “Doctor Fed.” We've also just received funding from @nlnet, through the NGI0 Commons Fund.

#DrFed is a web app for debugging #ActivityPub interoperability failures. When two implementations don't federate, the slow part is usually figuring out where the exchange broke: signing, JSON-LD processing, WebFinger, or something less obvious. DrFed's first job is to show where it failed.

We're the team behind @fedify: @2chanhaeng, @gaebalgom, @hongminhee, and @z9mb1. We'll post updates when there's something to try.

#fedidev #fediverse

DrFed — The ActivityPub debugging platform

DrFed is a web-based platform for developing and debugging ActivityPub implementations, built by the team behind Fedify.

DrFed

CVE-2026-42462 - JSON-LD restructuring bypass in Fedify. Attackers can alter signed activities by exploiting JSON-LD features. CVSS 7.0. Update to patched versions immediately. #CVE #Fedify #infosec

https://www.valtersit.com/cve/CVE-2026-42462/

CVE-2026-42462 | Fedify | Valters IT Hub

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3, an ...

Valters IT Hub

There's a Matrix room for #Fedify contributors, open to anyone curious about how development happens. Feel free to drop in or lurk; small questions are fine too.

#fedify-contributors:matrix.org

You're invited to talk on Matrix

You're invited to talk on Matrix

I’m working my way through this post which explains how to integrate #Fedify with Astro.

I need to see how I will keep the static site on the CDN while the API routes to a backend.

https://fedify.dev/tutorial/astro-blog

Building a federated blog | Fedify

In this tutorial, we will build a federated blog that uses Astro to serve blog posts from Markdown content and Fedify for ActivityPub federation, allowing blog posts to be delivered to followers across the fediverse.

I can't explain how excited I am to be able to speak with @[email protected] tomorrow, May 27th at 14:00 US Eastern time (UTC-4).

If you don't know Evan, he is co-editor of ActivityPub, the W3C standard for decentralized social networking used by platforms such as #Mastodon , #Bonfire , #GoToSocial , #Peertube , #Owncast , #Loops , #PixelFed , #Emissary , #Fedify , #FlohMarkt , #Lemmy , #Piefed , #WriteFreely , #Friendica , #GNUSocial , #Threads , #NodeBB , #Funkwhale , #Gancio , #Mobilizon , #BookWyrm , and MANY MANY MANY MORE + whatever YOU create next!

I've been speaking with folks and they've given him a very special nickname. You'll have to tune in tomorrow of catch the #VOD to catch it.

#livestream stream.firesidefedi.live

#vodcast tubefree.org/@firesidefedi

Or follow everything directly with @[email protected] and @[email protected]

And follow @[email protected] for listings of future episodes!

The Programmer’s Fulcrum: 15 May, 2026

This article originally appeared on The Fulcrum.

Welcome to this week’s The Programmer’s Fulcrum.

It’s your weekly curation of the essential news in the Open Media Network and Fediverse development communities with a focus on devastating big tech via Techno Anarchism.

As usual, we aim to provide actionable content you can use to destroy Techno Feudalism each week. It has the additional […]

https://newsletter.mobileatom.net/the-programmers-fulcrum-15-may-2026/ #ActivityPub #AI #ATProto #Beehiv #Buttondown #CastLab #Codeberg #CSS #Drupal #Elefeed #Emacs #Ente #FDroid #Faircamp #Fcast #Fedify #FediLab #FediProfile #fediverse #ForgeCMS #Forgejo #freebsd #Ghost #git #GitLab #Holos #HTML #HTTP #IndieWeb #javascript #LibreOffice #Librewolf #Linux #Mastodon #Matrix #MicroBlog #Movim #OMN #pckt #Pica #PostmarketOS #PureBlog #RSS #Silex #Snac #Substack #WebComponents #Webrings #WordPress #xPrivo #xWiki
This is the CUTEST kawaii Ai-chan (藍(あい)"Ai" is a normal female Japanese name meaning "Indigo" both the color and the plant; "Ai"-chan, the mascot of Misskey, has nothing to do with Large Language Models) I have ever seen from a technical literature titled like "Practical Fedify: An Introduction to ActivityPub Microblog Development"! I even see other mascots in the Fediverse too, like Don the Mastodon and that Blue Dinosaur mascot of Fedify (I don't know its name).
Huge thanks to
@hongminhee https://hollo.social/@hongminhee for their work on authoring this amazing book and developing Fedify itself! And if you can read Japanese and are interested in Fedify and ActivityPub Development, then definitely check this one out! You can pre-order the book on Amazon Japan → https://amzn.asia/d/0hQSKBmI #Fedify (The book will be printed on May 22)