Selenium automates browsers. That's it! What you do with that power is entirely up to you.

Locust is an open source performance/load testing tool for HTTP and other protocols. Its developer-friendly approach lets you define your tests in regular Python code. Locust tests can be run from command line or using its web-based UI

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.

Simplifying testing workflows for developers and QA engineers with instant, privacy-first mock file generation.

Checks web UI for browser compatibility (Compliance with Can I Use?)

Professional software tool for HTTP testing and debugging