Top API GitHub Repositories & Tools (2026)

Gravitee.io - OpenSource API Management

Template to build modern web apps with a classic REST API. Ideal if you need offline & real-time features on day one.

🗜 A Ruby wrapper for the bit.ly API

Starknet full node designed for peak concurrency and efficiency

YouTrackDB is a general-use object-oriented graph database with storage format native to handle graph relations. YouTrackDB supports Gremlin queries and ACID transactions. YTDB supports both embedded and client-server deployment models.

Chrome Extension, download photos, videos from Instagram post, tv, reels, stories and highlights

A paper library for creating custom inventory-based GUIs.

Zero-shot text classification over plain HTTP — no API key, no account. One Cloudflare Worker, a CLI, and an MCP server. https://classifier.dev

📘 Get all Warframe items directly from Warframe's API. No more messy wikia scraping.

Generate Refit interfaces and contracts from OpenAPI (Swagger) specifications

A simple connector to Binance Public API

API pública de busca e consulta de CNPJs do Brasil

🦜🔗 LangChain interfaces to Google's suite of AI products (e.g. Gemini & Vertex AI)

Upload, transform, optimize, and manage images and videos with Cloudinary from PHP

FastAPI SDK for Redis

A template for an API using Clean Architecture and .NET Minimal API's.

Direct interop Code for .NET Framework, .NET Core and .NET 5+ : DXGI, WIC, DirectX 9 to 12, Direct2D, Direct Write, Direct Composition, Media Foundation, WASAPI, CodecAPI, GDI, Spatial Audio, DVD, Windows Media Player, UWP DXInterop, WinUI3, etc.

💎 Ruby on Rails agent for Forest Admin to integrate directly to your existing Ruby on Rails backend application.

Interact with all your data in WordPress using GraphQL

Provides a list of fresh, working proxy servers (HTTP, HTTPS, SOCKS4 & SOCKS5) with multiple formats available for download.