What Amzn-User does
Amzn-User fetches web content in response to user actions, such as Alexa queries that require up-to-date information. Each visit maps to a live customer request, and Amazon states it does not crawl content for generative AI model training.
Should I allow Amzn-User to crawl my site?
Blocking Amzn-User removes your pages from live Amazon answers at the exact moment a customer is asking, for example through Alexa. It doesn't build an index; allowing it keeps you present in real-time answers.
How to control Amzn-User
Target Amzn-User in your robots.txt with the Amzn-User token. Rules apply per bot, so you can allow this one while blocking others, or the reverse.
Allow Amzn-User
User-agent: Amzn-User
Allow: /Block Amzn-User
User-agent: Amzn-User
Disallow: /Amazon documents that its crawlers honor the Robots Exclusion Protocol, with robots.txt changes taking about 24 hours to propagate. Genuine requests can be verified against the IP addresses published at developer.amazon.com/amazonbot/live-ip-addresses/.
User-agent string
As published by Amazon. Remember that user-agent strings can be spoofed, so verify suspicious traffic against the operator's published IP ranges.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amzn-User/0.1) Chrome/W.X.Y.Z Safari/537.36Amzn-User FAQ
What is Amzn-User?
Amzn-User is Amazon's user-triggered fetcher. It retrieves pages in real time when a customer action, such as an Alexa query, needs up-to-date information from the web. Amazon states it does not crawl content for generative AI model training.
How do I block Amzn-User?
Add a robots.txt group with "User-agent: Amzn-User" and "Disallow: /". Amazon honors the Robots Exclusion Protocol across its crawlers and says changes take about 24 hours to propagate. You can verify traffic against the IP list at developer.amazon.com/amazonbot/live-ip-addresses/.
About AI Assistant Fetchers
Agents that fetch a page in real time because a user asked an AI assistant about it. They don't build an index; each visit maps to a live conversation.
Blocking these removes your pages from live AI answers at the exact moment a user is asking about you or your category.
