App Engine Resource Usage is a free Chrome add-on developed by Rolando Lora. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools program. This add-on is designed to monitor resource usage for Google App Engine by analyzing HTTP headers.

As an application admin, you can use this add-on to estimate resource costs for each HTTP request. The add-on utilizes headers provided by Google App Engine, such as "x-appengine-estimated-cpm-us-dollars", "x-appengine-resource-usage", and "x-appengine-resource-usage". These headers are only included when using the application as an app owner.

App Engine Resource Usage also allows you to collect statistics and export them to CSV files for further analysis. If you're looking to closely monitor and manage resource usage for your Google App Engine applications, this add-on provides a convenient solution.