Yahoo! Site Explorer
Yahoo Site Explorer feed validator
About this crawler
Yahoo! Site Explorer is a web crawler identified by the regular-expression pattern Yahoo! Site Explorer in the User-Agent request header. It is categorised as feed-reader. Use the regex above to detect, log, allow, or block Yahoo! Site Explorer traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.056%
Technical details
- Name
- Yahoo! Site Explorer
- Pattern
Yahoo! Site Explorer- Tags
- feed-reader
- Reference
- http://help.yahoo.com/l/us/yahoo/search/siteexplorer/manage/
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
Yahoo! Site Explorer Feed Validator http://help.yahoo.com/l/us/yahoo/search/siteexplorer/manage/
Block this crawler
robots.txt — disallow Yahoo! Site Explorer:
User-agent: Yahoo! Site Explorer
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Yahoo! Site Explorer [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Yahoo! Site Explorer") {
return 403;
}
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