Open-source tool to generate OpenAPI docs from your code
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.
Open-source tool to generate OpenAPI docs from your code launched on November 20, 2025 with 11 votes, #906 of 9,796 launches that month and more than 75% of that year's launches.
In plain words
This open-source tool automatically generates OpenAPI documentation by scanning codebases and extracting routes, parameters, request bodies, and data models directly from the code. It currently supports Rails, Go, Python, and NodeJS frameworks with plans to add more. The tool produces a clean, ready-to-use OpenAPI specification that developers can integrate into their existing workflows, eliminating the need to manually write API documentation.
written from the facts on this page · September 2026
From the sources
Auto-generate OpenAPI 3.0 specs + interactive HTML API UI from your codebase — in seconds. - qodex-ai/apimesh
Does a similar job
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OpenAPI DevTools – Chrome extension that generates an API spec2023 · github.com · ▲811Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.
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Auto-generate an OpenAPI spec by listening to localhost2024 · github.com · ▲178Hey HN! We've developed OpenAPI AutoSpec, a tool for automatically generating OpenAPI specifications from localhost network traffic. It’s designed to simplify the creation of API documentation by just using your website or service, especially useful when you're pressed for time. Documenting endpoints one by one sucks. This project originated from us needing it at our past jobs when building 3rd-party integrations. It acts as a local server proxy that listens to your application’s HTTP traffic and automatically translates this into OpenAPI 3.0 specs, documenting endpoints, requests, and…
A faster way to prototype your APIs using OpenAPI 3 and Swagger UI2020 · github.com · ▲77A generator for OpenAPI 3. Contribute to egorsmkv/openapi3-generator development by creating an account on GitHub.
Simple API Generator (Rest + GraphQL)2019 · github.com · ▲121Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs

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