I use the Uniform Server for development purposes, so monitoring up-time isn't important. As far as I know, there is nothing built into the Uniform Server for this purpose.
If you are running a server that is on the Internet then you might Google for "monitor server". There are some free services available. This is a pretty common requirement.
If you are running a server on your desktop machine then perhaps you could write a Windows scheduled task to check that the ports respond. I imagine it is a bit of batch programming to hit a page, capture the response, and send an email if needed.