EXPLORE

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

Hurl, run and test HTTP requests with plain text.

Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, Llama, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

Faker is a Python package that generates fake data for you.

GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment in order to continuously test your system with real data. It can be used to increase confidence in code deployments, configuration changes and infrastructure changes.

🐐 Simple and complete React DOM testing utilities that encourage good testing practices.

JavaScript Testing utilities for React

A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)

Node.js test runner that lets you develop with confidence 🚀

☕️ Classic, reliable, trusted test framework for Node.js and the browser

Learn Go with test-driven development

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

A toolkit with common assertions and mocks that plays nicely with the standard library

JavaScript API for Chrome and Firefox

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

Record, Replay, and Stub HTTP Interactions.

HTTP Request & Response Service, written in Python + Flask.

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Delightful JavaScript Testing.

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline