We look at the status code returned. Any code that results in access, will return as online. In other words, if any code from 200 up and including 499, will return as online. Error 500's will return as offline.
We are working on the legal aspects of this feature and will announce the exact guarantees we offer once we move out of beta. For now, we do not offer any guarantees. You use this tool and rely on its notifications at your own risk.
Currently you are only allowed 50 monitors per person and they are all free. These 50 will always remain free, but we might charge for additional features in future, such as, for example, receiving an SMS when your site goes offline.
A website can go for a variety of reasons. Perhaps you just deployed some new code that caused an error to be thrown, or perhaps an application on your server crashed. Whatever the reason for it going down, it would be extremely useful to be notified via email when this does happen. This is exactly what an uptime monitor does. If your website goes down, for whatever reason, it notifies you so you can take action!
Yes, uptime monitoring is in beta. That means you might still run into one or two false positives as we iron out any kinks. We've been online for a while now, before releasing this to the public, so even though we are in beta, it is unlikely that you will run into any major issues.
We hope to end the beta period by 1 January 2018.
Currently you are limited to 50 monitors per user. This limit is likely to fall away after beta.