HttpMaster is a development and test tool for REST web services and API applications. HttpMaster can display and validate the most common REST formats; XML, JSON, and HTML and also supports powerful dynamic parameters, response data validation expressions, flexible request chaining, and many other properties. All these core features, along with many other options, give HttpMaster capabilities for thorough web service and API testing.

HttpMaster project (hmpr file) exposes a large number of options to fine tune generated web requests, for example, to specify http method, values of http headers, URL encoding of parameters, global URL and query string values, redirections, content types, request encoding, and many more.

One of the more powerful features of HttpMaster is request chaining. It is a flexible mechanism to combine multiple requests in execution batches where every request uses some data from the previous request. This allows for complete automation of web application testing.

HttpMaster also supports definition of dynamic parameters which can be be used to simulate variations of input data or to create global values for reuse across multiple requests.

When executing web requests, HttpMaster allows you to monitor and review complete request and response data of each executed request. Response data can be validated using validation rules; if validation rules are defined for the request item, HttpMaster will asses particular execution as successful only if it passes complete validation rule.

When working with HttpMaster, you will use intuitive user interface with tabs, descriptive icons, 'quick help' buttons and integrated help file.