The metadata pictured in your first screen shot can only be obtained using the IPS API. We don't publish that API to the general public, so for access to it you will need to reach out and create a ticket with the Support Team. You can do that by sending an email to firstname.lastname@example.org
The documentation pictured in your second screen shot is for the UGC (User Generated Content) system. It provides similar image serving functions for real-time user interactions, such as previewing a custom logo on a shirt or mug. To get that shared secret, you will also need to open a ticket with the support team, so that it can be sent to you securly.