Amzn-User
Amazon AI assistant for Alexa queries
About this crawler
Amzn-User is a web crawler identified by the regular-expression pattern Amzn-User in the User-Agent request header. It is categorised as ai-fetcher. Use the regex above to detect, log, allow, or block Amzn-User traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.52%
Technical details
- Name
- Amzn-User
- Pattern
Amzn-User- Tags
- ai-fetcher
- Reference
- https://developer.amazon.com/amazonbot
- Added
- 2026/04/26
- rDNS suffixes
.crawl.amazonbot.amazon- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Amzn-User with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.crawl.amazonbot.amazon
Sample User-Agent strings
Mozilla/5.0 (compatible; Amzn-User; +https://developer.amazon.com/)
Block this crawler
robots.txt — disallow Amzn-User:
User-agent: Amzn-User
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Amzn-User [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Amzn-User") {
return 403;
}
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