Top API GitHub Repositories & Tools (2026)

Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + React Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All Batteries Included.

A curated directory of job data APIs and scrapers for listings, hiring signals, salaries, and recruiting.

Complete Ruby geocoding solution.

A flexible framework for maintainable Ruby apps

Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.

Super-fast/easy runtime validators and serializers via transformation

Open-source auth gateway connecting 1500+ SaaS providers to AI agents through SDK, CLI, MCP, HTTP, and OpenAPI.

Automated Binance trading bot with pluggable strategies, historical backtesting, and a live dashboard

Run any process, on your machine or in an AI agent's environment, as if it were a pod in your Kubernetes cluster: real env vars, DNS, network, traffic.

Send and receive SMS messages using your Android phone programmatically via a simple HTTP API

Safe and rich Rust wrapper around the Vulkan API

PHP implementation of the GraphQL specification based on the reference implementation in JavaScript

OPNsense GUI, API and systems backend

📊 A minimalist, self-hosted WakaTime-compatible backend for coding statistics

:date: Easy!Appointments - Self Hosted Appointment Scheduler

The most popular PHP library for use with the Twitter OAuth REST API.

oneAPI Deep Neural Network Library (oneDNN)

A proxy server for adding push to your API, used at the core of Fastly's Fanout service

OpenAPI based HTTP Client code generator

WhatsApp REST API gateway in Rust. Multi-device and the official WhatsApp Cloud API behind one API: 230+ endpoints for messaging, templates, Flows, commerce, payments, calls, groups, webhooks and fleet ops. Multi-session, multi-DB, single binary.