Documentation & FAQ

Documentation

API
Integration with Slack
Integration with Zapier
How to automate check enable/disable and maintenance
Known issues when monitoring a Cloudflare protected website
Known issues when using Cloudflare DNS for custom status pages
How alerting works
Performance behind a CDN (like Cloudflare)
Known issues when monitoring an AWS WAF protected website
SMS alerts
SSL Expiration Notifications

FAQ

What does the "unsafe legacy renegotiation disabled" SSL error means?
What does the "dh key too small" SSL error means?
What does the "wrong signature type" SSL error means?
What is APDEX?
Can I monitor website content generated by javascript?
Why does updown think my website is down?
Can I disable IPv6 monitoring? It's generating false alerts
Is it possible to change the expected HTTP response code?
How does updown resolve and cache domain names?