Is Cesium Down?

The verdict at the top of this page comes from the latest poll of the official Cesium status feed and refreshes automatically, so you are not looking at a stale cached answer. PulsAPI re-checks a vendor every 60 seconds whenever it is not fully operational, or has changed status in the last 30 minutes, so an incident is always on the fastest cadence. Vendors that are stable and rarely watched are re-checked every 5 to 20 minutes instead.

Check the component list on this page first to see if your failure matches a known outage. If it does, you can report the issue for other engineers, follow the incident timeline for vendor updates, and run any fallback your app supports until Cesium recovers.

PulsAPI tracks Cesium uptime over 30, 60, and 90-day rolling windows. The current 30-day uptime is 100.00%. The 90-day uptime strip on this page is public: no account needed. A free account adds alerts whenever Cesium changes state, plus 15 days of incident detail; Pro extends that to 90 days and Business to 13 months.

PulsAPI reads the official Cesium status page. PulsAPI re-checks a vendor every 60 seconds whenever it is not fully operational, or has changed status in the last 30 minutes, so an incident is always on the fastest cadence. Vendors that are stable and rarely watched are re-checked every 5 to 20 minutes instead. Alerts reach Slack, Discord, Microsoft Teams, PagerDuty, or email within seconds of detection.

Yes. PulsAPI monitors 7 individual Cesium components, so you can see which service or region is affected instead of a generic "service degraded" banner.

Yes. Create a free account and subscribe to Cesium: the free plan covers three services with unlimited email alerts and no monthly notification cap. Paid plans lift the monitor limit entirely (Pro and above do not meter how many vendors you watch) and route the same alerts into Slack, Discord, Microsoft Teams, PagerDuty and webhooks.

Click "Report an issue" at the top of this page, pick the issue type and severity, and optionally add your region and a short note. Reports are anonymous and help other engineers spot Cesium problems early. Official status pages often lag real incidents by 10 to 20 minutes.

Yes. The free plan covers 3 monitored services with unlimited email alerts, permanently, so Cesium plus two more costs nothing. Every new account also opens with a 30-day Business trial (unlimited monitors, Slack alerts, SLA reporting) with no credit card.