Top API GitHub Repositories & Tools (2026)

☕️⚡️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

A set of .NET libraries for Windows implementing PInvoke calls to many native Windows APIs with supporting wrappers.

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.

Terminal API client for HTTP, GraphQL and gRPC. Plain .http files you can diff and version, with workflows, mocks, profiling, tracing, OpenAPI import, SSH tunnels, Kubernetes port-forwards, WebSocket, SSE and a CLI runner.

Discord4J is a fast, powerful, unopinionated, reactive library to enable quick and easy development of Discord bots for Java, Kotlin, and other JVM languages using the official Discord Bot API.

The headless Chrome/Chromium driver on top of Puppeteer. Take screenshots, generate PDFs, extract text and HTML with a production-ready API.

Open-source Back-end, self-hostable & ready to use - Real-time, storage, advanced search - Web, Apps, Mobile, IoT -

Fluent NHibernate!

An open-source, cloud-native, high-performance gateway unifying multiple LLM providers, from local solutions like Ollama to major cloud providers such as OpenAI, Groq, Cohere, Anthropic, Cloudflare and DeepSeek.

The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.

API pública para diferentes datos de Argentina

Zero-dependency TypeScript library for serializing data to the JSON:API specification with full type safety, relationships, links, and pagination