Status & response time
HTTP Check
The HTTP check sends a real request to a URL and reports the status code, time-to-first-byte and total response time, measured from five regions. It is the quickest way to confirm a site is up and to find where it responds slowly.
Run a HTTP Check test →What it measures
- HTTP status code (200, 301, 404, 503, …)
- TTFB — time to first byte — and total response time
- Server header and HTTPS/TLS indication
- Per-location availability across all five regions
How to read the results
- 2xx means success; 3xx is a redirect; 4xx/5xx indicate client/server errors.
- High TTFB with low transfer time points to slow server processing, not bandwidth.
- One region failing while others succeed suggests a regional CDN or routing issue.
Frequently asked questions
What is TTFB?
Time-to-first-byte is how long from sending the request until the first response byte arrives — it isolates server and network delay from download time.
Does the HTTP check follow redirects?
No — it reports the first response. Use the Redirect Check to follow the full redirect chain safely.