Uptime checker operated by Google as part of Google Cloud Monitoring. Site owners configure these checks in their own Google Cloud project to test that a public endpoint responds. Requests come from Google uptime-check servers in the USA, Europe, South America and Asia Pacific; Google publishes the source IP addresses rather than supporting reverse-DNS verification. The user agent is fixed and cannot be customised.

At a glance

Operator: Google
Type: Monitoring

How Centinel checks it

User agent: The request calls itself this crawler. Anyone can send the same string.

Google Cloud Monitoring Uptime Checks publishes nothing Centinel can check a source against, so a match reports the name and leaves the source unconfirmed. The match tokens, verification domains, and address feeds are not published here.

Allowing or blocking it

The crawler object in the /validate response sets access_allowed to true only for a verified source that your tenant allowlists. A policy rule can allow or block this crawler by its category, Monitoring.

Back to the crawler catalog