Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

🔥 🔥 🔥 A Free & Self-hostable Airtable Alternative

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

⚡️ Express inspired web framework written in Go

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

A cloud-native Go microservices framework with cli tool for productivity.

Send push notifications to your phone or desktop using PUT/POST

Blazing fast, instant realtime GraphQL APIs on all your data with fine grained access control, also trigger webhooks on database events.

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)

Microsoft REST API Guidelines

lightweight, idiomatic and composable router for building Go HTTP services

Parse Server for Node.js / Express

An opinionated GoLang framework for accelerated microservice development. Built in support for databases and observability.

gRPC to JSON proxy generator following the gRPC HTTP spec

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

A curated list of free public APIs — searchable, community-maintained, with a free JSON API.

Full Modular Monolith application with Domain-Driven Design approach.