Using the UI, you can log in to the browser by navigating to the URL:
https://firewall/api. When you first open the API browser, the
available Request
Types display.
You can drill down on the request types to see
further more detailed nodes available in the API, for example, the reports node
gives you many different types of predefined reports to retrieve.
Drilling down to the
predefined reports sections you can see a report like
top-application-categories available to you.
If you click on the URL, it sends a request through your browser and retrieves
the XML API response.
Along with the URL, the API browser also provides the XPath as necessary, as
shown here for a description of a predefined application:
(PAN-OS version 11.0.2 and later versions of 11.0) When you are finished
using the browser, use the XML API logout button in the browser.