alexa
Alexa web crawler
About this crawler
alexa is a web crawler identified by the regular-expression pattern alexa in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block alexa traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.061%
Technical details
- Name
- alexa
- Pattern
alexa- Tags
- search-engine
- Reference
- http://www.openwebspider.org/
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
alexa v0.1.4 (http://www.openwebspider.org/)
Block this crawler
robots.txt — disallow alexa:
User-agent: alexa
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} alexa [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "alexa") {
return 403;
}
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