ProjectShield-UrlCheck
Google DDoS protection bot validating customer origins
About this crawler
ProjectShield-UrlCheck is a web crawler identified by the regular-expression pattern ProjectShield-UrlCheck in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block ProjectShield-UrlCheck 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
- ProjectShield-UrlCheck
- Pattern
ProjectShield-UrlCheck- Tags
- scanner
- Reference
- https://projectshield.withgoogle.com/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; ProjectShield-UrlCheck; +http://g.co/projectshield)
Block this crawler
robots.txt — disallow ProjectShield-UrlCheck:
User-agent: ProjectShield-UrlCheck
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ProjectShield-UrlCheck [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "ProjectShield-UrlCheck") {
return 403;
}
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