The Amazon MWS Scratchpad is an Amazon-provided client that you can use to make requests using any Amazon MWS operation. Because Amazon MWS Scratchpad automatically generates and displays many of the inputs that are required in a query request to Amazon MWS, you can see how these inputs look when they are correctly formed.
To use Amazon MWS Scratchpad you should have a basic understanding of how to submit a query request to Amazon MWS.