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

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

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

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

📘 OpenAPI/Swagger-generated API Reference Documentation

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

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern Rest API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

Swagger Editor

Generate Go client and server boilerplate from OpenAPI 3 specifications

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

Generate TypeScript types from OpenAPI 3 specs

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

No description provided.

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

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

Browser extension that generates API specs for any app or website

🌀 OpenAPI to TypeScript codegen. Production-ready SDKs, Zod schemas, TanStack Query hooks, and 20+ plugins. Used by Vercel, OpenCode, and PayPal.

Language-agnostic HTTP API Testing Tool

Huma REST/HTTP API Framework for Golang with OpenAPI 3.1

Library for OpenAPI 3 with spring-boot

OpenAPI based HTTP Client code generator

A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

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), Arazzo v1.0, as well as AsyncAPI v2.x.

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

Sane and flexible OpenAPI 3 schema generation for Django REST framework.

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

Build beautiful, interactive API Docs with embeddable React or Web Components, powered by OpenAPI and Markdown.

A compiler for APIs described by the OpenAPI Specification with plugins for code generation and other API support tasks.