Open source rest-api projects
Every project in the registry tagged rest-api, ranked by real GitHub adoption.
Sleek, intuitive API development and testing platform
Transform databases into intuitive spreadsheets instantly
Lightweight, fast, and open-source API client for developers
Powerful API development and testing made effortless
Simple, fast, and secure push notifications for all
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec
🚀 Self-hosted TikTok & Douyin scraper and no-watermark video downloader — async REST API, MCP server, CLI and web console for posts, profiles, comments and pla
gRPC to JSON proxy generator following the gRPC HTTP spec
Open-source API documentation and testing platform
The modern API client that lives in your terminal.
Low code web framework for real world applications, in Python and Javascript
💨 Fast, Async-ready, Openapi, type hints based framework for building APIs
CakePHP: The Rapid Development Framework for PHP - Official Repository
Headless open-source eCommerce platform on top of PHP/Symfony/API Platform
Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API
Intercept, modify, and debug HTTP(S) requests effortlessly
The definitive self-hosted URL shortener
MediaCMS is a modern, fully featured open source video and media CMS, written in Python/Django and React, featuring a REST API.
Free open-source appointment booking for any business
Simple, Fast, Code first and Compile time generated OpenAPI documentation for Rust
同花顺官方 A股金融数据服务，提供股票实时行情、历史行情、财务报表、指数、板块、涨停等数据，适用于 AI Agent、量化研究和应用开发，支持 API、MCP、CLI 和 Python。Official Tonghuashun (HiThink) A-share financial data service provi
Library for OpenAPI 3 with spring-boot
🔨 Fast and idiomatic client-driven REST APIs.
🕸️ GraphQL Federation Framework for any API services such as REST, OpenAPI, Swagger, SOAP, gRPC and more...
Open source agency management tool for streamlined success
📱The official Wikipedia app for Android!
Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop
OpenAPI v3 code generator for go
Generate modern Python clients from OpenAPI
A Java wrapper to run Spring, Spring Boot, Jersey, and other apps inside AWS Lambda.
🐙 The Go backend powering OCTO — an open workplace built for humans × AI agents. REST & WebSocket APIs, Lobster (AI agent) orchestration, and WuKongIM real-tim
Build rest API with SQL in one minute
Schedule posts to every major social network, self-hosted
A Realtime API Gateway used with NATS to build REST, real time, and RPC APIs, where all your clients are synchronized seamlessly.
Official Sleek agent skill for creating and editing mobile app designs through the REST API. Includes account setup, screenshots and screen HTML.
Open-source changelog & roadmap platform for teams
Transform documentation with developer-focused simplicity
Related tags
Frequently asked questions
How many open source rest-api projects are there?
This registry tracks 37 projects tagged rest-api, with 471,680 GitHub stars between them. The most-adopted is Hoppscotch at 80,720 stars.
Are these rest-api projects free to use?
Yes — 35 of the 37 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which rest-api project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these rest-api projects still maintained?
34 of the 37 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.