What Hydrozen does
Hydrozen operates a monitoring bot that accesses URLs its customers have set up for monitoring. It identifies itself with the user agent "Hydrozen.io/1.0". Hydrozen publishes the bot's IP addresses in JSON and CSV formats at hydrozen.io/config/ and asks administrators to whitelist them so monitoring is not blocked, noting that the list is dynamic and should be rechecked regularly.
How to identify Hydrozen
Temso identifies Hydrozentraffic by matching the request's User-Agent header against this pattern. User-agent strings can be spoofed, so treat a match as an indication, not proof.
Hydrozen\.ioHydrozen FAQ
What is Hydrozen?
Hydrozen is a monitoring service whose bot accesses URLs configured for monitoring by Hydrozen customers. It identifies itself in logs with the user agent "Hydrozen.io/1.0".
Can I block Hydrozen with robots.txt?
The Hydrozen documentation does not mention robots.txt; the bot performs monitoring checks against URLs its users have configured rather than crawling site content. If you want to stop its requests, you can block the IP addresses Hydrozen publishes in JSON and CSV form, keeping in mind that the list changes over time.
About Operational Bots
Monitoring, security scanning, link previews, webhooks, and feed fetchers: the utility traffic that keeps integrations and shared links working.
Most of this traffic is service-critical or user-triggered. Webhooks and previews don't follow robots.txt, and blocking them tends to break things you rely on.
