The SLA enforcement business is VERY crowded… actually searching for a little script to install on a cheap separate host to do some http checks brought me to some http / web content checker services or scripts … as soon as some extras are needed you get charged almost the price of a standard web hosting package where you could setup that service yourself…

Of course some offers vary a lot in terms of service and features…

Free Monitoring of 5 Urls

ServerMojo – free

Knightguard @ $179 / yr

Montoring for 29$ or 12 surveys to fill out

check 1 URL for $8.95/mo

Site Uptime has another 1 URL checker free

And of course there are client based programs,

• best of which is ServersAlive that even has a free download version.
• Java based ServerWatcher – an open source SF project

Sadly, I haven't found mine yet and this is an endless research topic – so here some more directories to check:

• Web Monitor Tools
• DMOZ Site Monitoring

I would appreciate if anyone could point me to a cool OS script PHP/PERL/MYSQL to modify for my needs.