Know the instant your website goes down
Onagre checks your website around the clock and alerts you the moment it becomes slow, unreachable or stops showing the right content — before your visitors notice.
What Onagre watches for
- Is your site online and reachable?
- Does it load fast enough?
- Is the expected content still showing — no error page, no blank page?
Sensors that power this
- HTTP response Free Availability and expected status codes of a URL, with method, headers, body and authentication.
- Keyword Free A word or phrase that must, or must not, appear in the page.
- Certificate validity Pro Days left before a TLS certificate expires, with your own threshold.


Catch outages before your visitors do
Onagre checks your pages from public agents around the clock, at the interval you choose. Every check does far more than ask "is it up?" — it confirms the page answers quickly, returns the right HTTP status and still contains the content your visitors expect. The moment something drifts, your team is alerted on the channels it already uses.
And it works just as well for the sites and tools that live inside your company. Install a private agent on your network and Onagre keeps an eye on your internal pages too — without ever exposing them to the outside.
- Availability checks as often as every minute
- Response-time tracking to catch slowdowns early
- Content and keyword validation — no silent blank pages
- Certificate expiry watched so HTTPS never lapses
Other use cases
Start watching what your business runs on.
Free for up to 10 sensors, without a credit card. Public checks need nothing to install.