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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

⚡️ 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.

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.

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

Low code web framework for real world applications, in Python and Javascript

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

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

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

Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.

🔥 🔥 🔥 The Open Source Retool Alternative

蓝鲸智云配置平台(BlueKing CMDB)

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, MCP server

: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.