Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

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.

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

Fully integrated API and web service testing capabilities that automate end-to-end functional API testing.

REST API client library for .NET

Design, debug, and test APIs locally or in the cloud