Amzn-User: Amazon's on-demand fetcher
Amazon's fetcher for requests a user starts in Amazon's products.
- Free, no account.
- A few seconds.
- Nothing is stored.
Amzn-User at a glance
Everything Amazon documents about it, with links to the source.
- Operator
- Amazon
- Type
- Fetches on a user's request
- Used for
- Requests a user starts in Amazon's products
- Obeys robots.txt
- Not always. Amazon says that because Amzn-User fetches pages a user asked for, robots.txt rules may not apply. A rule still states your preference; to enforce it, block the published IP addresses at your firewall.
- 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
- IP addresses
- Not published.
- Documentation
- developer.amazon.com/amazonbot
How to block Amzn-User
Opens a page because a person asked an assistant to read it. Blocking it stops those visits for the operators that honour robots.txt. Several say they may not, so a firewall rule is the real block.
Block the whole site
Add this group to robots.txt at the root of your site.
User-agent: Amzn-User Disallow: /
Block only some paths
List the paths; everything else stays open to Amzn-User.
User-agent: Amzn-User Disallow: /private/ Disallow: /drafts/
robots.txt is a request Amzn-User may not follow. To enforce it, block its requests at your server or firewall.
How to verify Amzn-User
Anyone can send a crawler's user-agent string. Where the request comes from is what proves it.
- 1
Find requests whose user agent contains "Amzn-User" in your server or CDN logs.
- 2
Amazon publishes no IP list for Amzn-User, so it cannot be verified from the request alone. Treat unusual volume as a scraper using its name, and rate-limit or block it at the firewall.
- 3
Block what fails the check at the firewall. A robots.txt rule only reaches crawlers that choose to read it.
Other crawlers from Amazon
Each has its own token, and blocking one leaves the others untouched.
Frequently asked questions
Amazon's fetcher for requests a user starts in Amazon's products. Amazon says that because its actions can be started by a user, it may not follow all robots.txt rules.
Not always. Amazon says that because Amzn-User fetches pages a user asked for, robots.txt rules may not apply. A rule still states your preference; to enforce it, block the published IP addresses at your firewall.
Add a group for its token to robots.txt at the root of your site: "User-agent: Amzn-User" followed by "Disallow: /". To close only part of the site, list those paths instead of "/".
Because Amazon treats these fetches as a user's own request and says robots.txt may not apply. If you need to stop them, block the crawler's IP addresses at the server or firewall.
Checked against Amazon's documentation on 29 September 2026.
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