Pro Server Check Pro automatically monitors your server every 15 minutes and notifies you by numeric pager, alphanumeric pager, or email, if it discovers a problem. You can define problem conditions for which you want to be notified.
Server is slow to respond.
Missing keywords on your page. Server performance below a desired level. However the next product, Netwhistle, does overcome this problem. Netwhistle Netwhistle comes in two flavors, the free PersonalWhistle service and the premium BusinessWhistle. PersonalWhistle provides 24x7 monitoring with your server being tested every 1 or 6 hours.