Git-native API workspace
API work,
treated like code.
Design, test and document APIs in one place. Compose requests from reusable blocks in plain Markdown, and version everything in your own repo.
- 17k+ installs
- Works fully offline
- No account needed
One .void file. Follow it all the way.
The request you write in Voiden is the same file your team reviews, your pipeline runs, and your AI agent calls.
It lives in your repo
No export. No sync. No JSON blobs. Pure Markdown. Git is the storage layer: your repo is the workspace, so API work is diffable, reviewable and branchable like the rest of your code.
See all features$ git add api/auth.void
$ git commit -m "Add login request"
$ git push
# reviewed in a pull request, like any other fileYour API knowledge is scattered.
Every team has this same mess. Five tools and zero coherence. Voiden brings API design, testing and docs into one place.
.void file in your repoBuilt for developers who version-control everything else.
File-centric. Text-based. Git-native.
LEGO for HTTP
Break requests into small, reusable blocks: endpoint, headers, auth, params. Reuse them across files like functions.
Executable API Docs
Requests, docs, and explanations live side-by-side in plain Markdown, and execute in place. No switching tools.
Design + Test + Document
The first tool that brings API design, testing, and docs into one file, one format, one workflow.
Ready for Claude Code and Codex
Initialize MCP registers your project so Claude Code and Codex can work with your .void requests. The connection block lets you connect to and test an external MCP server.
Trusted by developers
Real posts from real developers who found Voiden on X.
Kevin
@xzkevs
Voiden takes the opposite approach — free, open source, works offline, and doesn't collect telemetry. What caught my attention is how it combines API specs, tests, and documentation into a single executable markdown file.
Sayra Spec
@SayraSpec
Voiden is an open source, completely offline API client built for developers who actually value engineering privacy. It demands zero accounts, costs nothing, and runs entirely on your local machine.
kartik singh
@kartik_singhhh
Merged my first PR into Voiden 🎉 Learned a lot through code reviews, architecture discussions, and testing. Huge thanks to the maintainers for the feedback. Looking forward to contributing more 🚀
Musa
@MusaAkoke
What stood out to me is how Voiden combines API specs, testing, and documentation into a single executable Markdown file — Git-native, with reusable blocks and JS/Python/Shell scripting.
Presido
@PIRESIDO
Voiden treats API work more like real development work, not something trapped inside another SaaS dashboard. Offline, open source, no accounts, no telemetry, no lock-in — for developers who care about ownership.
Dhruv
@dhruv2038
A great alternative to Postman is Voiden! It has a very different approach to API tooling.
Suni
@suni_code
Wow, something new... I will check this soon.
Tom Dörr
@tom_doerr
Offline API client for developers.
FlutWiz
@FlutWiz
Git-native workflows, local-first development, AI-friendly formats, and no vendor lock-in are changing developer tools. That's why I like what Voiden is building.
Questions, answered.
Something else on your mind? Most discussions happen on our Discord.
Join the DiscordBecause real API work doesn't stay simple for long. What starts as a single request quickly turns into auth flows, dependencies between requests, test cases, and docs that drift out of sync. Voiden treats APIs as systems, not isolated calls. Check here how Voiden is different from other API Clients: voiden.md/comparison
A workspace you actually control.
Most API tools assume they should run your workflow. Voiden gives you structure, flexibility, and no lock-in.
