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@nlnet.nl, 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@hollo.social: @2chanhaeng@hackers.pub, @gaebalgom@hackers.pub, @hongminhee@hollo.social, and @z9mb1@hackers.pub. 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

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 […]
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