Amzn-User

Amzn-User is a bot operated by Amazon that fetches single pages on demand for an AI assistant. Amzn-User is an AI assistant operated by Amazon, used for fetching web content to answer user queries through Alexa and other Amazon AI services. Whether it honours robots.txt is undocumented, and a request claiming to be Amzn-User can be checked against a forward-confirmed reverse DNS lookup.

AmazonReverse DNSrobots.txt:No policy

Request says

"Amzn-User"

Checked against

Amazon's reverse DNS

VerifiedNot this crawler

Live check

Verify an IP that claimed to be Amzn-User

Paste the address from the log line. It is checked against what the operator publishes.

The check needs JavaScript. The evidence it uses is public either way: the operator's own documentation says how a request claiming to be Amzn-User can be verified, and the table below repeats it.

Reference

Amzn-User at a glance

Reference data for the Amzn-User crawler
User agent	`Amzn-User` Token only: match on the substring.
Operator	Amazon
Purpose	Assistant fetchers
Respects robots.txt	No policy
Verification method	Reverse DNSReverse DNS, forward confirmed User-triggered fetch from an Amazon assistant. Same reverse-then-forward DNS check as Amazonbot. https://developer.amazon.com/amazonbot
Crawl pattern	Not published
Robots.txt tokens	`Amzn-User`
Operator documentation	None published

Amzn-User is an AI assistant operated by Amazon, used for fetching web content to answer user queries through Alexa and other Amazon AI services.

robots.txt

Allow or block Amzn-User

Paste one at the root of your domain. Rules are per token.

Block Amzn-User

User-agent: Amzn-User
Disallow: /

Allow Amzn-User

User-agent: Amzn-User
Allow: /

Allow, except the pages you never want quoted

User-agent: Amzn-User
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /search

Edit the Disallow paths to match your own URLs.

What blocking actually costs you

Blocking Amzn-User means a person who asks about one of your URLs gets an error instead of a summary. That is a support and reputation trade-off, not a training one.

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FAQ

Amzn-User questions

What is Amzn-User?

Does Amzn-User respect robots.txt?

Not documented. No operator statement says whether Amzn-User reads robots.txt, so add the rule but verify in your logs that the requests actually stop.

How do I verify a request really came from Amzn-User?

User-triggered fetch from an Amazon assistant. Same reverse-then-forward DNS check as Amazonbot. The reference is published at https://developer.amazon.com/amazonbot.

How do I block Amzn-User?

Add the Amzn-User token to robots.txt with Disallow: /. If the crawler ignores robots.txt, match the user agent at your CDN or reverse proxy and return 403 there instead.

Will blocking Amzn-User hurt my search rankings?

Blocking Amzn-User means a person who asks about one of your URLs gets an error instead of a summary. That is a support and reputation trade-off, not a training one.