Top API GitHub Repositories & Tools (2026)

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

Apprise - Push Notifications that work with just about every platform!

A deployment automation tool built on Ruby, Rake, and SSH.

PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.

Pure Go implementation of the WebRTC API

Turn CNB cloud-workspace in-network AI into production OpenAI & Anthropic (Claude Code) APIs. Zero deps, v5.2 self-healing HA, quota CLI.

The no-magic web API and microservices framework for Python developers, with a focus on reliability and performance at scale.

cuDF - GPU DataFrame Library

A collaborative list of public APIs for developers

Headless open-source eCommerce platform on top of PHP/Symfony/API Platform

List of 128 languages for Laravel Framework, Laravel Jetstream, Laravel Fortify, Laravel Breeze, Laravel Cashier, Laravel Nova and Laravel UI.

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

A tool for mocking HTTP services

A free, open-source developer workspace. Snippets, notes, HTTP requests, calculations, and dev tools in one local-first app.

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

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.