An email within minutes of an outage, and another when it's fixed.
No card. Sign in with a one-time email link.
Every failed check is retried a few seconds later from Cloudflare's network before an incident opens. Only a confirmed failure sends the "DOWN" email; the "UP" email follows on the first successful check and says how long the outage lasted.
Yes. 10 monitors checked every 5 minutes, email alerts, SSL expiry warnings and a public status page, with no card and no time limit. Pro is $5/month for 50 monitors checked every minute.
A connection error, a timeout (10 seconds), an HTTP status of 400 or higher, or, for keyword monitors, the keyword missing (or present, if you choose). A failed check is retried a few seconds later before anything is reported, so a single blip doesn't page you.
By email to your account address the moment a monitor goes down, and again when it comes back up with how long it was down. Pro adds up to 10 alert contacts.