Voiden is an offline-first, git-native API tool built on Markdown - and it very intentionally didn’t start as “let’s build a better Postman”.

Over time, API tooling became heavyweight: cloud dependencies for local work, forced accounts, proprietary formats, and workflows that break the moment you’re offline. Testing a localhost API shouldn’t need an internet connection.

So we asked a simple question: What if an API tool respected how developers already work?

That led to a few core ideas:

  • Offline-first, no accounts, no telemetry

  • Git as the source of truth

  • Specs, tests, and docs living together in Markdown

We opensourced Voiden because extensibility without openness just shifts the bottleneck.

If workflows should be transparent, the tool should be too.

Github : github.com/VoidenHQ/voiden

Download here : voiden.md/download