1. Add the URL you want checked
From the dashboard, choose Add monitor and paste the public URL. realuptime only probes public destinations: private and internal addresses are refused (error RU-3002); for hosts inside a private network, use the monitor agent instead.
2. Pick an interval and regions
Choose how often to check and which of your plan's probe regions should run it (four regions on Free, eight on Growth, all ten on Scale, out of ten live: US-East, US-West, Europe, Asia-Pacific, US-Central, Canada, UK, Southeast Asia, Australia, and South America). Each region reports separately: that per-region truth is the point of the product.
3. Optionally add response assertions
On http checks you can assert on the response status range and body content, so a page that answers 200 with an error message still counts as down.
4. Watch the first results arrive
Within one interval each selected region posts its first reading. A region that has not reported yet shows as awaiting data, never silently green.
Go deeper
The full reference lives in the docs: Checks documentation. Error codes named above are each explained in the error-code reference.