Rest GitHub Repositories (2026) · Open Source Tools

Light, flexible and extensible ASGI framework | Built to scale

Fast, native API client for REST, gRPC, WebSocket and GraphQL. A local-first Postman alternative written in Go: no Electron, no account, no cloud.

Simulate API failures, throttling, and chaos — all from your command line.

A security library for FastAPI that provides middleware to control IPs, log requests, detect penetration attempts, honeypot setup, behavioural analysis, emergency mode lockdown, block Cloud Provider IPs, country blocking, and much more... It integrates seamlessly with FastAPI to offer robust protection against various security threats.

A frontend Framework for single-page applications on top of REST/GraphQL APIs, using TypeScript, React and Material Design

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

bottle.py is a fast and simple micro-framework for python web-applications.

A damn simple library for building production-ready RESTful web services.

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

A tool for mocking HTTP services

Java DSL for easy testing of REST services

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.

Huma REST/HTTP API Framework for Golang with OpenAPI 3.1

GitHub iOS client in RxSwift and MVVM-C clean architecture

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

The server component of API Platform: hypermedia and GraphQL APIs in minutes

RapiDoc -WebComponent for OpenAPI Spec

This repository is for active development of the Azure SDK for Go. For consumers of the SDK we recommend visiting our public developer docs at:

REST version of the Spring Petclinic sample application

Up to date Discord API Typings, versioned by the API version