DigitalOcean's managed synthetic monitoring service that performs HTTP, HTTPS, TCP, and ping checks against endpoints at configurable intervals from multiple global locations. Uptime Monitoring alerts via email, Slack, or PagerDuty when an endpoint fails its health check, typically within 60 seconds of an outage.
A startup monitors their API gateway with DigitalOcean Uptime Monitoring, polling `https://api.example.com/health` every 30 seconds from three regions. When their load balancer crashes at 3am, the on-call engineer receives a Slack alert within 60 seconds and can respond before customers notice.