Top API GitHub Repositories & Tools (2026)

Codable Swift OpenAPI implementation.

UNA Community Management System

Demo app for the API Platform framework

Locally runnable server with built-in data caching, providing both tick-level historical and consolidated real-time cryptocurrency market data via HTTP and WebSocket APIs

Production-ready Stripe-like API versioning in FastAPI

PHP version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project

Lightweight embeddable web server written in pure C# with few dependencies to 3rd-party libraries.

Apache Camel Quarkus

This repository contains low-level bindings for Vulkan used in Evergine.

The Complete AI Development Toolkit for Claude Code. 106 skills, 36 agents, 171 hooks. Install `ork` for stable (v9.x), or `ork-alpha` for the v10 line, which ships daily.

Instant SECURE Full Stack Apps and AI Agents

llama.cpp/ik_llama.cpp launcher: loads big MoE models across mismatched multi-GPU rigs by exact VRAM math.

Integrate Stellantis vehicles on Home Assistant

The official JS client library for the Massive.com REST and WebSocket API.

The official ngrok Kubernetes Operator

API package for code generated by Swift OpenAPI Generator.

Securely scale AI usage across your organization. A single stack to Connect, Secure, Observe and Distribute agents, MCPs, and Skills within your company.

List of open-source Discord API Libraries

ros2_medkit - diagnostics gateway for ROS 2 robots. Faults, live data, operations, scripts, locking, triggers, and OTA updates via REST API. No SSH, no custom tooling.

A modern, mostly zero-allocation C++23 library for working with low-level Windows within user-space. Iteration over loaded modules via PEB, EAT iteration, lazy imports, syscalls, and more.