Thunder Client
Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.
Similar Tools
API Testing Platform that automatically generates unit test cases with dependency mocks from API calls
Swagger UI allows anyone — be it your development team or your end consumers — to visualize and interact with the API’s resources without having any of the implementation logic in place
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.
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.
Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.
Professional software tool for HTTP testing and debugging
See autonomous QA in action with BearQ—from exploration to test generation. Trial access included.
Test complex APIs and microservices smarter—with confidence.
QALS Summer'26: Scale AI testing from pilots to production with BrowserStack’s AI Test Platform
Better than a generic video, see YOUR test, live, ready to show you what matters most: quality at scale.