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.

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

Automate API workflows. Chain HTTP requests. Validate. Zero code.

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

Mockoon is the easiest and quickest way to design and run mock REST APIs.