Monitor 404s with Sentry
Katy wrote about how to detect 404s with Sentry: her team set up an alert to shout at them when more than 10 users see the same 404 path in a week. That's pretty neat! Katy writes:
Since introducing Sentry to our 404 page, nearly two years ago, we have caught issues before users and our team members. But, more importantly, no false alarms.