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

Burp or Burp Suite is a set of tools used for penetration testing of web applications. It is developed by a company named Portswigger who make freely available a Web Security Academy which has a range of lessons on penetration testing.

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

Unifying API testing, API Performance testing, API Mocks and UI testing.

Test, scrape, generate, and automate without the pain and expense of hosting your own headless browsers.

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