Intercept helps test web applications my collecting data on the interactions between the web client (browser) and the application under test.
The core module is lightweight HTTP proxy that sites between the browser or web client and any web applications that the browser connects to. By intercepting this traffic, Intercept is able to collect metrics as well as the exchanged data for analysis or verification.
Intercept Server is a web server that talks to the Core module to display the captured interactions. The server is useful in manual and exploratory testing.
Intercept requires that the you have a working java development environment setup, everything else is included in the repository.