Free
ByteCap
ByteCap is a cloud-based platform that monitors API uptime, tests API functionality, tracks webhooks, and sends alerts to maintain API reliability and performance.
Free
Yazero
Yazero Validator is a free online tool that validates JSON data against JSON Schema to ensure data correctness and API response compliance.
Free
Hedra
Hedra is an open-source load testing tool that helps developers simulate realistic traffic patterns to test API and web service performance, supporting multi-stage scenarios and CI/CD integration.
Free Trial
Aspen – API Testing for macOS
Aspen is a native macOS application for API testing that enables developers to send HTTP requests, customize them, and inspect responses, focusing on local API debugging.
Free
API Governance Testing
API Governance Testing is an open-source tool that automates API contract validation, enforces governance policies, and integrates with CI/CD pipelines to ensure secure and reliable API management.
Free
HTTPie AI
HTTPie AI is an AI-enhanced HTTP client that helps developers test, debug, and automate API workflows through an intuitive interface and scripting capabilities.