Bot signals · Web crawler
What is UptimeRobot?
UptimeRobot monitoring
UptimeRobot is an uptime monitoring service. Its servers check the sites and services its customers set up, and confirm downtime with further checks from another data centre.
01 · Profile
UptimeRobot at a glance.
What to look for in your logs, and what the lookup API returns for its addresses.
- Type
- Web crawler
- User agent
UptimeRobot- API flag
risk.is_crawler
A user agent alone never sets a flag. Anyone can claim to be UptimeRobot; the flag follows the address the request comes from.
02 · In the response
What a match looks like.
A lookup of a UptimeRobot address sets risk.is_crawler. The flags come with geolocation and network data in the same response, for API keys on every paid plan.
The response says which kind of bot an address belongs to, not which operator. A request that claims to be UptimeRobot while risk.is_crawler is false should not be trusted as UptimeRobot.
{
// … location and network fields …
"risk": {
"is_ai": false,
"is_crawler": true,
"is_scanner": false
}
}
03 · Control
Allow or block UptimeRobot.
Your options
- robots.txt works only for crawlers that choose to follow it. Check the operator’s documentation for the token it reads.
- Firewall, WAF or CDN. Many offer bot rules you can allow or deny by category. Use them to enforce what robots.txt only asks for.
- In your app. Look up the client address and allow or deny on
risk.is_crawler, alongside the user agent. - Never on the user agent alone. Blocking the name stops only honest clients; allowing it lets anyone in who borrows it.
04 · Questions
About UptimeRobot.
What is UptimeRobot?
UptimeRobot is an uptime monitoring service. Its servers check the sites and services its customers set up, and confirm downtime with further checks from another data centre.
How do I block UptimeRobot?
Deny it at your firewall, WAF or CDN, or look up each client address and deny requests where risk.is_crawler is true. Do not rely on the user agent alone.
Can I trust a request that says it is UptimeRobot?
Not on the user agent alone: any client can send “UptimeRobot” in its user agent. A user agent alone never sets a flag. Check the address with the free bot checker or the lookup API.
Which risk flag does UptimeRobot set?
Its addresses set risk.is_crawler in the lookup response. The risk flags come with every paid plan.
From the blog
Go deeper.
Related bots
Recognise UptimeRobot on every request.
is_ai, is_crawler and is_scanner in every lookup, on every paid plan, from 9,00 € a month (VAT included).