TheOpenAPI Specification (OAS), previously known as theSwagger Specification, is a specification for a programming language-agnostic, machine-readable interface definition language for describing, producing, consuming, and visualizing web services. OpenAPI documents describe API services and are represented in YAML or JSON formats.

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

• UpdatedMar 17, 2025
• Python

Full stack, modern web application template. Using FastAPI, React, SQLModel, PostgreSQL, Docker, GitHub Actions, automatic HTTPS and more.

• UpdatedFeb 22, 2025
• TypeScript

The OpenAPI Specification Repository

• UpdatedMar 17, 2025
• Markdown

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

• UpdatedMar 17, 2025
• JavaScript

📘 OpenAPI/Swagger-generated API Reference Documentation

• UpdatedMar 11, 2025
• TypeScript

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

• UpdatedMar 17, 2025
• Java

gRPC to JSON proxy generator following the gRPC HTTP spec

• UpdatedMar 17, 2025
• Go

Automatically generate RESTful API documentation with Swagger 2.0 for Go.

• UpdatedMar 13, 2025
• Go

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

• UpdatedMar 17, 2025
• TypeScript

🕸️ Create REST and GraphQL APIs, scaffold Jamstack webapps, stream changes in real-time.

• UpdatedMar 14, 2025
• TypeScript

Automagically reverse-engineer REST APIs via capturing traffic

• UpdatedMar 17, 2025
• HTML

💨 Fast, Async-ready, Openapi, type hints based framework for building APIs

• UpdatedMar 15, 2025
• Python

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

• UpdatedMar 10, 2025
• Java

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

• UpdatedMar 14, 2025
• TypeScript

The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript.

• UpdatedMar 16, 2025
• C#

Generate Go client and server boilerplate from OpenAPI 3 specifications

• UpdatedMar 17, 2025
• Go

Generate TypeScript types from OpenAPI 3 specs

• UpdatedMar 17, 2025
• TypeScript

Production-ready, Light, Flexible and Extensible ASGI API framework | Effortlessly Build Performant APIs

• UpdatedMar 10, 2025
• Python

Automated JSON API documentation for API's built with Spring

• UpdatedMar 18, 2024
• Java

Design-first Go framework that generates API code, documentation, and clients. Define once in an elegant DSL, deploy as HTTP and gRPC services with zero drift between code and docs.

• UpdatedMar 17, 2025
• Go