Amzn-User
Amazon •
Web Crawler
What is Amzn-User?
Amzn-User is not Amazon's general indexing crawler. Amazon says it can retrieve current web information in response to a customer's action, such as an Alexa question, and does not crawl for generative-AI training. The value shown is the stable identifier inside Amazon's example browser-style header; its Chrome version can vary. Amazon cautions that user-initiated actions may not follow every robots.txt directive, so this should not be described as a crawler that always obeys robots rules.
User Agent String
Amzn-User/0.1
How to Control Amzn-User
Block Completely
To prevent Amzn-User from accessing your entire website, add this to your robots.txt file:
# Block Amzn-User
User-agent: Amzn-User
Disallow: /
Block Specific Directories
To restrict access to certain parts of your site while allowing others:
User-agent: Amzn-User
Disallow: /admin/
Disallow: /private/
Disallow: /wp-admin/
Allow: /public/
Set Crawl Delay
To slow down the crawl rate (note: not all bots respect this directive):
User-agent: Amzn-User
Crawl-delay: 10
How to Verify Amzn-User
Verification Method:
Check the source IP against Amazon's published Amzn-User live-IP list; a matching user-agent is not authentication.
Check the source IP against Amazon's published Amzn-User live-IP list; a matching user-agent is not authentication.
Learn more in the official documentation.
⚠️ AI Training Notice
This bot may collect and use your website content for AI model training. Consider whether you want your content used for this purpose before allowing access.
This bot may collect and use your website content for AI model training. Consider whether you want your content used for this purpose before allowing access.
Detection Patterns
Multiple ways to detect Amzn-User in your application:
Basic Pattern
/Amzn\-User/i
Strict Pattern
/^Amzn\-User\/0\.1$/
Flexible Pattern
/Amzn\-User[\s\/]?[\d\.]*?/i
Vendor Match
/.*Amazon.*Amzn\-User/i
Implementation Examples
// PHP Detection for Amzn-User
function detect_amzn_user() {
$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';
$pattern = '/Amzn\-User/i';
if (preg_match($pattern, $user_agent)) {
// Log the detection
error_log('Amzn-User detected from IP: ' . $_SERVER['REMOTE_ADDR']);
// Set cache headers
header('Cache-Control: public, max-age=3600');
header('X-Robots-Tag: noarchive');
// Optional: Serve cached version
if (file_exists('cache/' . md5($_SERVER['REQUEST_URI']) . '.html')) {
readfile('cache/' . md5($_SERVER['REQUEST_URI']) . '.html');
exit;
}
return true;
}
return false;
}
# Python/Flask Detection for Amzn-User
import re
from flask import request, make_response
def detect_amzn_user():
user_agent = request.headers.get('User-Agent', '')
pattern = r'Amzn\-User'
if re.search(pattern, user_agent, re.IGNORECASE):
# Create response with caching
response = make_response()
response.headers['Cache-Control'] = 'public, max-age=3600'
response.headers['X-Robots-Tag'] = 'noarchive'
return True
return False
# Django Middleware
class amzn_userMiddleware:
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
if self.detect_bot(request):
# Handle bot traffic
pass
return self.get_response(request)
// JavaScript/Node.js Detection for Amzn-User
const express = require('express');
const app = express();
// Middleware to detect Amzn-User
function detect_amzn_user(req, res, next) {
const userAgent = req.headers['user-agent'] || '';
const pattern = /Amzn\-User/i;
if (pattern.test(userAgent)) {
// Log bot detection
console.log('Amzn-User detected from IP:', req.ip);
// Set cache headers
res.set({
'Cache-Control': 'public, max-age=3600',
'X-Robots-Tag': 'noarchive'
});
// Mark request as bot
req.isBot = true;
req.botName = 'Amzn-User';
}
next();
}
app.use(detect_amzn_user);
# Apache .htaccess rules for Amzn-User
# Block completely
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Amzn\-User [NC]
RewriteRule .* - [F,L]
# Or redirect to a static version
RewriteCond %{HTTP_USER_AGENT} Amzn\-User [NC]
RewriteCond %{REQUEST_URI} !^/static/
RewriteRule ^(.*)$ /static/$1 [L]
# Or set environment variable for PHP
SetEnvIfNoCase User-Agent "Amzn\-User" is_bot=1
# Add cache headers for this bot
<If "%{HTTP_USER_AGENT} =~ /Amzn\-User/i">
Header set Cache-Control "public, max-age=3600"
Header set X-Robots-Tag "noarchive"
</If>
# Nginx configuration for Amzn-User
# Map user agent to variable
map $http_user_agent $is_amzn_user {
default 0;
~*Amzn\-User 1;
}
server {
# Block the bot completely
if ($is_amzn_user) {
return 403;
}
# Or serve cached content
location / {
if ($is_amzn_user) {
root /var/www/cached;
try_files $uri $uri.html $uri/index.html @backend;
}
try_files $uri @backend;
}
# Add headers for bot requests
location @backend {
if ($is_amzn_user) {
add_header Cache-Control "public, max-age=3600";
add_header X-Robots-Tag "noarchive";
}
proxy_pass http://backend;
}
}
Should You Block This Bot?
Recommendations based on your website type:
| Site Type | Recommendation | Reasoning |
|---|---|---|
| E-commerce | Allow | Essential for product visibility in search results |
| Blog/News | Consider Blocking | Your content may be used for AI training without compensation |
| SaaS Application | Block | No benefit for application interfaces; preserve resources |
| Documentation | Allow | Improves documentation discoverability for developers |
| Corporate Site | Allow | Allow for public pages, block sensitive areas like intranets |
Advanced robots.txt Configurations
E-commerce Site Configuration
User-agent: Amzn-User
Crawl-delay: 5
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Disallow: /api/
Disallow: /*?sort=
Disallow: /*?filter=
Disallow: /*&page=
Allow: /products/
Allow: /categories/
Sitemap: https://example.com/sitemap.xml
Publishing/Blog Configuration
User-agent: Amzn-User
# Blocking AI training bot
Disallow: /
SaaS/Application Configuration
User-agent: Amzn-User
Disallow: /app/
Disallow: /api/
Disallow: /dashboard/
Disallow: /settings/
Allow: /
Allow: /pricing/
Allow: /features/
Allow: /docs/
Quick Reference
User Agent Match
Amzn-User
Robots.txt Name
Amzn-User
Category
ai, search
Respects robots.txt
May not respect
Copied to clipboard!