For reading data via GET a normal browser is sufficient. With Firefox, the XML data can also be clearly displayed as a tree structure.
Simply enter the URL of the resource (including the API key) into the address bar of the browser.
For the testing of the remaining methods (POST, PUT, DELETE), we recommend using either the command line tool curl or the firefox plugin RESTClient as a graphical alternative.
To better illustrate the examples we have outlined on this page using the command line tool curl.
The actual resource descriptions we have given up the deadwood and listed only the most important components of the requests.