example HTTP GET command to close 1 or both relays

(Complete Newbi) I purchased a Pro 2 after learning about Shelly and reading some notes. But now with a working unit on my network, I'm unable to find what I was looking for.

The ability to use an HTTP GET command to turn on the dry contact relays. Is this possible with this or other shelly devices. My video system uses http GET, PUT, PATCH, HEAD,

I would greatly appreciate seeing an example command to turn on a relay, assuming it is possible. Thanks.

Thank You, The reference page is very helpful. All of these examples must assume there is no password assigned to the device. I'm now trying to discover how to embed the admin/password into the HTTP:// command.

Another device I tested uses http://admin:password@192.168.x.x/ then in another window in my setup I provide the admin username and password...