Amzn-User: user agent, IP verification and robots.txt
Amzn-User is operated by Amazon. It is classified here as Not a crawler (User-triggered fetch). Verification method: Published, but not machine-readable.
Exact 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
robots.txt token: Amzn-User. The user-agent string is self-asserted and can be
forged by anyone. It is a claim, not proof.
How to verify Amzn-User is genuine
Amazon publishes addresses at https://developer.amazon.com/amazonbot/live-ip-addresses/, but as a rendered HTML page rather than a machine-readable file, so it cannot be pulled automatically.
How to block or allow Amzn-User
User-agent: Amzn-User
Disallow: /Replace Disallow with Allow to permit it explicitly.
What blocking Amzn-User costs you
Amzn-User fetches live information to answer a customer's question, for example an Alexa query that needs current data. Blocking it means Alexa answers about your content from stale or third-party sources instead of from you. Amazon states it is not used for generative AI training.
What is specific to Amzn-User
Amazon calls the endpoint behind this token the live crawl IP list, which is a useful description of the traffic: it arrives when a person asks a question, not on a crawl schedule. Because the action is user-initiated, Amazon states it may not follow all robots.txt directives, putting it in the same category as ChatGPT-User and Perplexity-User. Its published IP page is client-rendered and yields zero CIDR blocks when fetched without JavaScript, so unlike Amzn-SearchBot there is no practical automated verification path.
Verify a request claiming to be Amzn-User
Check a Amzn-User request against Amazon's published ranges
Source
Primary documentation: https://developer.amazon.com/amazonbot. Last verified 2026-08-02.
Other Amazon crawlers
- Amzn-SearchBot - Amazon and Alexa search
- Amazonbot - Product improvement and AI training