Would love to have the ability to have a monitor that alerts if an endpoint is accessible, that is the other way around from what you can do now. One possible use case would be to check that a firewall is up and preventing access from outside of a region/country.
An alternative to this would be to be able to select which response codes to accept as OK, like one or more of:
200-299
300-399
400-499
500-599
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