Top API GitHub Repositories & Tools (2026)

A fast, lightweight and more productive microservices framework

.NET Client for Telegram Bot API

Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat

A standard API for multi-agent reinforcement learning environments, with popular reference environments and related utilities

Shopware 6 is an open commerce platform based on Symfony Framework and Vue and supported by a worldwide community and more than 3.100 community extensions

PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs

Monorepo containing OneLauncher, OneClient, and their core backend. 100% Rust.

Python ODBC bridge

Node.js samples for Google Cloud Platform products.

Swift community driven package for OpenAI public API

☕️⚡️TShock provides Terraria servers with server-side characters, anti-cheat, and community management tools.

Real-time monitoring for Plex, Jellyfin, and Emby servers. Track streams, analyze playback, and detect account sharing from a single dashboard.

Use Hugging Face with JavaScript

Free HTTP, HTTPS, SOCKS4 & SOCKS5 proxy list. ~22k proxies across 90+ countries, refreshed every 5 minutes from the ProxyScrape v4 API. TXT, JSON & CSV.

🔥 HAPI FHIR - Java API for HL7 FHIR Clients and Servers

📼 The missing YouTube and YouTube Music macOS app

Self-Hosted API Management for Builders

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

🌍 The open source route planner api with plenty of features.

Generate Swift client and server code from an OpenAPI document.