Uptime Robot is one of the leading players in the uptime monitoring space. They provide 50 free monitors with easy to use API, maintenance windows and SSL monitoring, etc.
Uptime Robot integrates seamlessly with Spike via webhooks. Create a webhook alert for each or all of your monitors for one or all of your services.
With Uptime Robot integration, you can -
Add unlimited Uptime Robot integrations for each of your monitors in different services
Receive alerts for every incident
Alert the right person/team with multiple integrations across your services
suppress similar incidents from Uptime Robot to reduce alert fatigue
