Yahoo Ad monitoring
Ad ecosystem crawler auditing quality and policy compliance
About this crawler
Yahoo Ad monitoring is a web crawler identified by the regular-expression pattern Yahoo Ad monitoring in the User-Agent request header. It is categorised as advertising. Use the regex above to detect, log, allow, or block Yahoo Ad monitoring traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- Yahoo Ad monitoring
- Pattern
Yahoo Ad monitoring- Tags
- advertising
- Reference
- https://developer.yahoo.com/api/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; Yahoo Ad monitoring; https://help.yahoo.com/kb/yahoo-ad-monitoring-SLN24857.html)
Block this crawler
robots.txt — disallow Yahoo Ad monitoring:
User-agent: Yahoo Ad monitoring
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Yahoo Ad monitoring [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Yahoo Ad monitoring") {
return 403;
}
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