U
URLChecker
URL checking service
About this crawler
URLChecker is a web crawler identified by the regular-expression pattern URLChecker in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block URLChecker 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
- URLChecker
- Pattern
URLChecker- Tags
- monitoring
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
URLChecker
Block this crawler
robots.txt — disallow URLChecker:
User-agent: URLChecker
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} URLChecker [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "URLChecker") {
return 403;
}
← back to all crawlers