I have been using this link https://graph.api.smartthings.com/localDevice/list which does not work for me. the list is always empty. That is the link that is always given for the US version to view local run devices. I noticed when I logged into my IDE this morning that the link was different.
The link to view my local devices is really https://graph-na02-useast1.api.smartthings.com/localDevice/list
so if your local device list comes up empty log into your IDE and look at the web address its pointing you to. then change your link to match your actual web address. for me i just had to add whats in bold to the end of my web address https://graph-na02-useast1 .api.smartthings.com/localDevice/list
so that it looks like this https://graph-na02-useast1.api.smartthings.com/localDevice/list
this might help some that have the empty local device list problem. this also makes me wonder how many webservers they have running since na02-usaeast1 would imply multiple servers