Today Google announced the Google APIs Explorer, a Web-based interface for experimenting with the company's various APIs. So far only seven APIs are supported, Google the company promises to add more soon.

The Explorer lets you select a supported service and view a list of supported methods. You can then select a method, fill in the parameters, execute the command and get the results. It seems like a great way to try out an API without writing code. Google's announcement has a few sample requests to get started with.