Custom Endpoint Monitor Settings

Hello,

We had a situation where one of our service plan instances was failing to load our website, but was still returning a 200 response, therefore the endpoint monitor still saw the website as up.  This situation caused us to lose a significant amount of traffic.

We would like to know if its possible to have the endpoint monitor check a specific path, but with a GET request, seeking an item on the web page itself?  

Only checking for a 200 response is problematic.