Amzn-User

What is Amzn-User?

Fetches pages an Amazon AI assistant user explicitly requested. Assistant crawlers fetch a page in real time when a user explicitly asks an AI assistant about it. They do not build a standing index of the web. Blocking them makes the assistant say it cannot access your page instead of summarizing it — a poor experience for users who were actively looking for you.

Allowing it means users who ask about you get an accurate, current answer with your page as the source.

Does Amzn-User respect robots.txt?

Yes. Amzn-User honors robots.txt directives, including wildcard rules and Allow lines. A Disallow rule for this crawler is respected — but remember robots.txt is a voluntary protocol across the whole industry, not a wall.

How to block Amzn-User

Add this group to your robots.txt to deny Amzn-User across your whole site:

User-agent: Amzn-User
Disallow: /

Blocking it only affects user-requested fetches, so the traffic cost is small — but the users you do lose are the highest-intent ones.

How to allow Amzn-User

Amzn-User is allowed by default on every site. It only gets blocked if a matching rule exists — most often a global User-agent: * group with Disallow: /. To exempt it while blocking other bots, put an empty Disallow group for it before the global block:

User-agent: Amzn-User
Disallow:

User-agent: *
Disallow: /