SiteGuardian Monitoring Bot
Information about our automated monitoring service
What is this bot?
SiteGuardian is an automated website monitoring service. Our bot periodically checks the availability, security, and performance of websites that our customers have registered for monitoring.
User-Agent String
SiteGuardian/1.4 (+https://siteguardian.io/bot; EU compliance & uptime monitoring)
If you see this User-Agent in your server logs, it means one of our customers has registered your website for monitoring.
What does the bot check?
- HTTP availability and response time (every 60 seconds)
- SSL/TLS certificate validity and expiry (hourly)
- Security headers (HSTS, CSP, X-Frame-Options) (hourly)
- security.txt presence (RFC 9116) (every 6 hours)
- DNS record integrity (every 6 hours)
Request behavior
- The bot sends only GET requests (HEAD for some checks)
- Maximum 2 requests per minute per URL
- The bot respects robots.txt Crawl-delay directives
- All requests originate from Hetzner Online GmbH data centers in Germany (EU)
How to block this bot
If you do not wish to be monitored, you can block the bot via robots.txt:
User-agent: SiteGuardian
Disallow: /
Disallow: /
Alternatively, contact the website owner who registered the monitor – they can remove it from their SiteGuardian dashboard.
Contact
If you have questions about this bot or would like to report an issue:
- Email: bot@siteguardian.io
- Website: siteguardian.io
Operator
GÜNTER WEBER
MOMMENHEIMER STRASSE 48
55129 MAINZ
Deutschland