EZProxy is a tool for enabling access to online services within a campus network. It allows the various network nodes to pass messages to each other, allowing them to make requests for resources and services and receive responses.

In order for a node to be able to send a message to another node, it must have the correct address. In a large network, it is not always possible to determine the correct address for a particular node, which is why it is necessary to have a way to look up the correct address.

The extension for Chrome allows the user to easily access pages through their EZProxy, even if it is not configured on their own machine. This is done by adding a button to the browser which will automatically make the necessary request to the library.