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What is Amzn-User?

Amzn-User is the agent Amazon uses to fetch a page live when a user asks for it.

User-triggered fetchPartly followsIP list
Operator
Amazon
Purpose
User-triggered fetch. Fetches a page when a person asks an assistant about it.
robots.txt token
Amzn-User
Sample user agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amzn-User/0.1) Chrome/W.X.Y.Z Safari/537.36User agents change with versions. Match on the token, not the full string.
Follows robots.txt
Partly. Amazon says it may not follow all robots.txt directives.
How to verify
Check the IP against Amazon's published list.Amazon publishes its list as a web page of single IP addresses.
Sources
Amazon documentationAmazon IP list
Last reviewed

Allow or block Amzn-User

Block Amzn-User
User-agent: Amzn-User
Disallow: /

Asks Amzn-User not to crawl any page. Well-behaved crawlers stop; it does not stop anyone who ignores robots.txt.

Allow Amzn-User
User-agent: Amzn-User
Allow: /

Lets Amzn-User crawl everything. You only need this if a broader rule would otherwise block it.

Should you block it?

Amzn-User only visits when a person asks Amazon's assistant about your page. Blocking it means the assistant can't read the page that person asked about.

Write a full policy with the AI Crawler Policy Generator

How to verify a Amzn-User request

  1. Find the IP address of the request in your server or CDN logs.
  2. Get Amazon's published list (Amazon IP list).
  3. Check whether the IP falls inside one of the ranges. If it doesn't, the request is not from Amzn-User, whatever its user agent says.

Amazon publishes its list as a web page of single IP addresses.

Questions about Amzn-User

Is Amzn-User safe to allow?

Amzn-User reads public pages; it does not log in or submit forms. Whether to allow it depends on whether you want Amazon's product to use your pages.

How do I know a request is really Amzn-User?

Check the request against what Amazon publishes: Check the IP against Amazon's published list. The user agent alone proves nothing.

How often does Amzn-User visit?

It depends on your site; Amazon doesn't publish a schedule. Referscope shows the real visits.

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