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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

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.

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

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

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

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

:rocket: Open Source REST API for SpaceX launch, rocket, core, capsule, starlink, launchpad, and landing pad data.

The future of Node.js REST development

An interactive command-line HTTP and API testing client built on top of HTTPie featuring autocomplete, syntax highlighting, and more. https://twitter.com/httpie

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

Headless open-source eCommerce platform on top of PHP/Symfony/API Platform

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

Java DSL for easy testing of REST services

🔥 🔥 🔥 The Open Source Retool Alternative

An open, sub-millisecond, single-executable Firebase alternative with type-safe APIs, built-in WebAssembly runtime, realtime subscriptions, auth, and admin UI built on Rust, SQLite & Wasmtime.

The definitive self-hosted URL shortener

The Restreamer is a complete streaming server solution for self-hosting. It has a visually appealing user interface and no ongoing license costs. Upload your live stream to YouTube, Twitch, Facebook, Vimeo, or other streaming solutions like Wowza. Receive video data from OBS and publish it with the RTMP and SRT server.

MediaCMS is a modern, fully featured open source video and media CMS, written in Python/Django and React, featuring a REST API.

Official Documentation for the Binance Spot APIs and Streams

PostgreSQL ➕ REST, low-code, simplify and accelerate development, ⚡ instant, realtime, high-performance on any Postgres application, existing or new

:date: Easy!Appointments - Self Hosted Appointment Scheduler

A minimal Python framework for building custom AI inference servers with full control over logic, batching, and scaling.

Automated generation of real Swagger/OpenAPI 2.0 schemas from Django REST Framework code.

Apache Linkis builds a computation middleware layer to facilitate connection, governance and orchestration between the upper applications and the underlying data engines.

A model set of guidelines for RESTful APIs and Events, created by Zalando

🏆 Self-hosted, open-source WebRTC video conferencing platform for real-time communication and collaboration. A modern alternative to Zoom, built on SFU architecture.

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