Open-source tool to generate OpenAPI docs from your code
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We built an open-source tool that scans your codebase and generates OpenAPI docs in minutes. Right now it supports Rails, Go, Python, and NodeJS frameworks, and we will keep adding more. It picks up routes, params, request bodies, and models directly from the code and outputs a clean OpenAPI spec you can drop into your workflow.
HN · launched Nov 20, 2025 · 11 upvotes (top 46%) · 0 views
Niche: api documentation tools · 42 launches, 1 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 42 launches in api documentation tools →
Could you build this?
Partial Parsing static code across multiple distinct programming languages (Rails, Go, Python, Node) and correctly inferring route structures, request/response models, and types requires sophisticated AST parsing and framework-specific semantics.
What it would actually take: The engine needs Tree-sitter or language-specific AST parsers for Ruby, Python, Go, and TypeScript to traverse ASTs and locate framework-specific routing calls (e.g., Express, Gin, Django, Rails) and serializer/model definitions. A deterministic analyzer must infer schemas and types from dynamically typed or partially annotated code and compile them into valid OpenAPI 3.x specifications.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 266 launches clear the similarity bar, closest 8 shown.
Attention rank: #101 of 267 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 10 days after the earliest competitor.
- swaggerz · ph · 2026-10-27 · 1 upvotes · similarity 0.56
- Routebase · hn · 2026-08-26 · 8 upvotes · similarity 0.52
- Octri.dev · ph · 2026-10-04 · 127 upvotes · similarity 0.52
- Open-source .docx editor library for building document apps · hn · 2026-05-21 · 107 upvotes · similarity 0.46
- I built a tool that turns any API into a CLI for agents · hn · 2026-03-01 · 6 upvotes · similarity 0.45
- openapi-mcp · ph · 2026-10-29 · 1 upvotes · similarity 0.45
- FreeAPI · ph · 2026-10-05 · 2 upvotes · similarity 0.45
- FreeAPI · ph · 2026-10-22 · 1 upvotes · similarity 0.45
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