Not sure of the specific format for URC, but you can test commands from a browser & terminal. Type
http:[IP_OF_ROKU]:8060/query/apps
to see an XML list of installed Roku apps. If you have a terminal program with the ‘curl’ command, you can test the keystroke commands [that’s 2 single quotes after the “-d”):
curl -d ‘’ http:[IP_OF_ROKU]:8060/keypress/home
You probably can’t send the keypress commands from a browser address field because they use an http “POST” command instead of the typical “GET” command that’s used when you request a webpage…. but try
http://remoku.tv.