AnAPI can be thought of as an instruction manual for communication between multiple software apparatuses. For example, an API may be used for database communication between web applications. By extracting the implementation and relinquishing data into objects, an API simplifies programming.

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

• UpdatedDec 16, 2025
• TypeScript

🚀 A hand-curated list of free, open, and developer-friendly APIs

• UpdatedDec 15, 2025

The no-magic web API and microservices framework for Python developers, with a focus on reliability and performance at scale.

• UpdatedDec 7, 2025
• Python

Free and open-source API Client & Interceptor.

• UpdatedDec 17, 2025
• TypeScript

Add content management functionality to any site - plug & play / headless / api-first CMS

• UpdatedApr 28, 2024
• JavaScript

The core Laravel CMS Composer package

• UpdatedDec 17, 2025
• PHP

Connexion is a modern Python web framework that makes spec-first and api-first development easy.

• UpdatedDec 1, 2025
• Python

Curso para aprender desarrollo frontend Web con Python puro desde cero. Elaborado durante las emisiones en directo desde Twitch de MoureDev.

• UpdatedNov 20, 2025
• HTML

A client implementation for ChatGPT and Bing AI. Available as a Node.js module, REST API server, and CLI app.

• UpdatedJan 27, 2024
• JavaScript

A high-performance REST toolkit written in C++

• UpdatedDec 15, 2025
• C++

DummyJSON.com provides different types of REST Endpoints filled with JSON data which you can use in developing the frontend with your favorite framework and library without worrying about writing a backend.

• UpdatedDec 10, 2025
• EJS

Package to optimize your site automatically which results in a 35%+ optimization. Laravel Page Speed delivers an end-to-end optimization pipeline for Blade-rendered pages and REST APIs with measurable gains in latency, bandwidth, and resiliency.

• UpdatedDec 15, 2025
• PHP

List of API's for gathering information about phone numbers, addresses, domains etc

• UpdatedMay 16, 2025

write APIs using direct SQL queries with no hassle, let's rethink about SQL

• UpdatedDec 28, 2024
• Go

한국 서비스에 이용 가능한 Public API 모음 | Public APIs Available for Korean Services

• UpdatedDec 16, 2025
• Python

Cryptocurrency Exchange REST API SDK Wrapper Implemented With the golang, Supporting OKX, Binance

• UpdatedSep 4, 2025
• Go

Automated API Testing and Quality Assurance

• UpdatedAug 3, 2024
• TypeScript

Large-scale LLM inference engine

• UpdatedNov 24, 2025
• C++

A secure, efficient TCP/UDP tunneling solution that delivers fast, reliable access across network restrictions using pre-established TCP/QUIC connections.

• UpdatedNov 28, 2025
• Go

🔥 🔥 🔥 The Open Source Retool, Tooljet and Appsmith Alternative

• UpdatedDec 5, 2025
• HTML