Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

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.

Charles is a HTTP proxy that enables you to see traffic between your machine and the backend

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

Monitor network requests and API failures with real-time insights

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