workflowstacks
devtools

voiden: API design in Markdown

Design, test and document APIs with voiden, a Git native tool for founders
intermediate⏱ 30 minutesπŸ’΅ Free (open-source)
1,642 stars77 forksTypeScriptGuide quality 8/10Updated 9/2/2026100% free Β· open source
What it is

Design REST APIs and GraphQL queries using Markdown to test and document your API.

Real use case example

"A founder, Emma, wanted to build an API endpoint for her e-commerce website to send a confirmation email to customers after checkout. She used voiden to compose the API request and then exported it as code to integrate it with her Stripe payments system. It took her about 30 minutes and she was able to see the result immediately."

Best insideClaude DesktopGemini Code Assist
When to use it
  • β€’When you need to create API documentation that's easy to maintain and update
  • β€’When you want to test and iterate on API designs without writing code
  • β€’When you need to collaborate with team members on API development and documentation
Ready-to-paste prompt
Create a new API request using `### Request | POST | /users | {"name": "John Doe", "email": "john@example.com"}`
Heads up: Make sure you have Node.js and TypeScript installed on your system, as voiden is built with TypeScript and requires a compatible runtime environment
Saves to your device
Use with Claude
New

Skip the builder β€” one click puts this in Claude, Cursor, Antigravity and more.

πŸ› οΈ Technical setup

Expect 20–40 minutes in a terminal β€” or let your AI agent drive it.

Try it instantly β€” no install
Claude Code
mkdir -p ~/.claude/skills/voiden && curl -fsSL https://workflowstacks.com/api/skills/voiden/claude-skill -o ~/.claude/skills/voiden/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go β€” no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How voiden: API design in Markdown works
Codeflow
Free to inspect

Voiden: API design in Markdown is a very large TypeScript project (~100k lines across 466 code files, plus 1 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Apache-2.0 license, has a test suite.

Size
Very large codebase
~100k lines Β· 466 code files Β· days to read β€” use, don't read
Setup
Developer setup
A real software project. Use it via its install path; don't expect to read it all.
Runs on
Node.js
No API keys detected
TypeScript 93%JavaScript 4%CSS 1%C++ 1%
Where to start reading
  1. 1
    README.md
    Start here β€” what it does and how to install it
  2. 2
    package.json
    Dependencies and the commands it exposes
What's in each folder
apps/ui/Frontend / UI359 files
packages/Sub-packages / plugins45 files
docs/Documentation16 files
apps/electron/Package142 files
patches/Patches4 files
scripts/Helper scripts4 files
nix/Folder1 files
.github/CI / automation (GitHub Actions)7 files
READMEHas testsDocumentedCI checksApache-2.0 licenseUpdated this month
Quick Actions
Details
Creator
VoidenHQ
Language
TypeScript
Category
devtools
Published
5/9/2025

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