Why does it not show the HTTP status code?
By design it reports only Up or Down and the response time. If you need the exact status code and body, the API health check reads them for you.
Does a site returning errors show as Up?
Yes. Up means the server responded. A site serving 503 errors on every request is still responding, and will report as Up here
It says Down but the site loads in my other tab. Why?
The check runs from a Postman server, so a site that blocks or rate-limits automated traffic can read as Down even though it loads in your browser. Treat Down as a strong signal rather than proof, and confirm with a direct visit
Can it check a site on my local network?
No — the check runs from a Postman server, so it can only reach publicly-accessible URLs, not localhost or an address on your private network
Can it watch a site continuously?
No. This is a single manual check. Scheduled checks with alerting are what Postman monitors are for