Here is what I propose to offer. Would you be interested in this? It this space too crowded? Am I adding enough value/reducing enough cost?<p>For $10/mo<p>10 url checks - alarm on status codes, header regex, content regex, content size, response time (DNS* lookup, first byte, content download, or the whole thing), etc. I want this functionality to be the key differentiator. I will capture the full response (headers + html) on failed requests and store them for 90 days, so you can visualize them.<p>10 system checks - Any combination of Ping, DNS, SSL cert, TCP, UDP, SMTP, POP3, IMAP<p>All checks can be tested on the spot to ensure that they're set up correctly. (Will not be recorded as 'official' tests).<p>100 notification credits - will integrate with twilio to provide sms or voice alarms. 2 credits per mms notification and 5 credits per voice notification. Notifications via Twitter or Email are free/unlimited.<p>10 check executions per hour. (e.g. 6 minute interval)<p>System will only initially run out of a small number of US DC's, but if it takes on it will expand to worldwide testing nodes covering multiple backbones. (IOW, the MVP won't be very good at dealing with network reachability - something I've never found much value in with my own monitoring)<p>Interface will strive for extreme simplicity.<p>----------<p>Post-MVP:<p>Once I get some sense of my costs (how much hardware it takes to run say 1,000 customers or 10,000 urls on), I want to really kick up the offering on the url check. I want to move to full DOM simulation with click checks etc either via HTMLUnit, Selenium, WebKit, or something else. This will be a premium offering.<p>Android, iPhone, desktop integration.<p>Agent software so you can perform additional checks from a location of your choosing, on whatever interval you like. Likely be Java. Would it make sense to open source this? Would it be giving away too much? Maybe open sourced after we gain "significant" traction. Or maybe it would be developed openly, but not allowed to be used for commercial purposes or relicensed.<p>Two way API, custom checks.