IsDownBot
Downtime monitoring bot checking website and service availability status
About this crawler
IsDownBot is a web crawler identified by the regular-expression pattern IsDownBot\/ in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block IsDownBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- IsDownBot
- Pattern
IsDownBot\/- Tags
- monitoring
- Reference
- https://help.isdown.app/website-monitors/isdownbot
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; IsDownBot/1.0;)
Block this crawler
robots.txt — disallow IsDownBot:
User-agent: IsDownBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} IsDownBot\/ [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "IsDownBot\\/") {
return 403;
}
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