This is a user action from the Grades tool that allows students to see course average & range for each graded assignment.
It's a click on the button on the right-hand menubar marked "show all details"
I think it might be '/api/v1/courses/<###>/ping' but I'm not sure.
Help is greatly appreciated!
Unfortunately the "Show All Details" is a client side action only, and does not fire off a network request. If you hover over the link as a student you can see this by: "https://domain.com/courses/:course_id/grades#". If you notice there is a pound sign at the end. This pound sign is why it doesn't fire off a network request. This is generally referred to as an anchor link, or fragment.
I've seen two major uses for anchor links in general websites:
1. Linking to a specific part of a page (framgent/anchor). This is usually seen when you click a link, and it scrolls half way down the page.
As such you'll not be able to get that click information from the requests table.
As for the ping information this is implemented through every page in Canvas. This is when a user spends a a certain amount of time on a page. It's the clients way of making sure it's still got a good connectivity to the Canvas Server(s).