What is Amzn-User?
Amzn-User is Amazon's user-triggered fetcher. A user-triggered fetcher runs when a person asks an AI product to open a page, not on a schedule.
| Operator | Amazon |
|---|---|
| Purpose (operator wording) | user-triggered fetch |
| robots.txt token | Amzn-User |
| User agent string | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amzn-User/0.1) Chrome/W.X.Y.Z Safari/537.36 |
| Respects robots.txt | Partial (operator: may not follow all robots.txt directives) |
| IP ranges | https://developer.amazon.com/amazonbot/live-ip-addresses/ |
| Last verified |
What else should I know about Amzn-User?
What is the Amzn-User user agent string?
This is the user agent string Amazon documents for Amzn-User, as of October 29, 2026. Version numbers and details can change, so match on the token in robots.txt, not on the whole string.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amzn-User/0.1) Chrome/W.X.Y.Z Safari/537.36How do I block Amzn-User in robots.txt?
Add this group to the robots.txt file at the root of your site. It asks Amzn-User to stay out of every page. Amazon says the crawler may not follow robots.txt, so this may not stop it.
User-agent: Amzn-User
Disallow: /To allow it explicitly, for example while a broader rule blocks other bots:
User-agent: Amzn-User
Allow: /How do I opt out of Amazon training but stay in its search?
Each Amazon user agent has its own token, so you can set them one by one. This file blocks Amazonbot and allows Amzn-SearchBot, Amzn-User. Every line comes from the rows in this dataset. Whether allowing a bot keeps you in a product is Amazon's call, so check each crawler's page. Amazon says Amzn-User may not follow robots.txt.
User-agent: Amazonbot
Disallow: /
User-agent: Amzn-SearchBot
Allow: /
User-agent: Amzn-User
Allow: /Does blocking Amzn-User affect AI answers?
Amazon does not say what blocking Amzn-User changes. That is not stated.
Each other Amazon user agent has its own robots.txt token, so a rule for Amzn-User does not cover them. See the related crawlers below.
Does Amzn-User follow robots.txt?
Partial. Operator: may not follow all robots.txt directives. Amazon: 'Because actions taken by Amzn-User can be initiated by a user, it may not follow all robots.txt directives.'
Robots.txt is a request, not a lock (RFC 9309).
What IP addresses does Amzn-User use?
Amazon publishes a list at https://developer.amazon.com/amazonbot/live-ip-addresses/. We did not download or parse it. A request that claims to be Amzn-User but comes from outside that list is not Amzn-User.
Which other Amazon crawlers are there?
What should I read next?
Next: give AI tools something to quote
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