The tool URL is used to match tool URLs to the correct tool configuration. Prefixing the URL with http(s) is optional.

Additionally, the base URL is used as the tool URL if a tool URL is not specified in the external tool instance.

For example, a base URL of *tool.com* would match the following:

* tool.com
* tool.com/quizzes
* tool.com/quizzes/quiz.php?id=10
* www.tool.com/quizzes

A base URL of *www.tool.com/quizzes* would match the following:

* www.tool.com/quizzes
* tool.com/quizzes
* tool.com/quizzes/take.php?id=10

A base URL of *quiz.tool.com* would match the following:

* quiz.tool.com
* quiz.tool.com/take.php?id=10

If two different tool configurations are for the same domain, the most specific match will be used.

You can also insert a cartridge URL if you have one and the details for the tool will be automatically filled.