Discover the Best Open-Source Openapi3 Projects Sorted by Stars

FastAPI framework, high performance, easy to learn, fast to code, ready for production

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

📘 OpenAPI/Swagger-generated API Reference Documentation

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.

Full stack, modern web application generator. Using FastAPI, PostgreSQL as database, Docker, automatic HTTPS and more.

Swagger Editor

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

Language-agnostic HTTP API Testing Tool

Generate Go client and server boilerplate from OpenAPI 3 specifications

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

Knife4j is a set of Swagger2 and OpenAPI3 All-in-one enhancement solution

Generate TypeScript types from OpenAPI 3 specs

🌐 Wikipedia for Web APIs. Directory of REST API definitions in OpenAPI 2.0/3.x format

Library for OpenAPI 3 with spring-boot

Javascript library to connect to swagger-enabled APIs via browser or nodejs

Docker image with Uvicorn managed by Gunicorn for high-performance FastAPI web applications in Python with performance auto-tuning. Optionally with Alpine Linux.

OpenAPI 3.0 (and Swagger v2) implementation for Go (parsing, converting, validation, and more)

A flexible JSON/YAML linter for creating automated style guides, with baked in support for OpenAPI v3.1, v3.0, and v2.0 as well as AsyncAPI v2.x.