Guides
Original explanations with reproducible examples. Facts, examples, inferences and commercial claims are kept apart.
explainer
How an outage is confirmed before you are alerted
The exact path from one failed check to an incident and a notification: confirmation runs, confidence labels, probe correlation, flap protection and what each one means for the alert you receive.
Updated 2026-10-10
explainer
Error budgets and burn-rate alerts in practice
How UptimeMonitor360 computes an SLO's error budget from time-weighted availability, what the burn rate means, when a burn alert fires and how to read the budget chart.
Updated 2026-10-10
explainer
Requiring two-factor authentication across your team
What the account-wide two-factor requirement does, how members enrol and recover access, how API keys and probes behave, and what gets audited.
Updated 2026-10-10
explainer
What browser checks can and cannot see
What a headless-browser check records, how its sandbox and egress controls constrain it, what the screenshot evidence is good for, and why field data from real users is a different measurement.
Updated 2026-10-10
explainer
What HTTP failures actually mean for monitoring
How to read status codes, timeouts and TLS errors in monitoring results, and what each one does and does not tell you.
Updated 2026-10-10
explainer
DNS problems explained: NXDOMAIN, NODATA, propagation and drift
The difference between a name that does not exist, a record type that is missing, a stale cache and a change you did not intend.
Updated 2026-10-10
explainer
Certificate errors explained and how to avoid expiry surprises
Expired, mismatched and untrusted certificates, intermediate chains, SNI and renewal monitoring.
Updated 2026-10-10
explainer
Why cron jobs fail silently and how heartbeats catch it
Common cron failure modes, daylight-saving gaps and heartbeat monitoring with start, success and failure signals.
Updated 2026-10-10
comparison
How to compare uptime monitoring services fairly
A checklist for comparing monitoring products on measurement honesty, limits and pricing, with sources and dates for any claim.
Updated 2026-10-10