01 · Operator
Who operates Amazon-Bedrock-AgentCore-Browser
- Company
- Amazon Web Services
- Type
- AI assistant fetcher
- Official docs
- docs.aws.amazon.com
02 · Behavior
What Amazon-Bedrock-AgentCore-Browser does
AgentCore Browser gives AI agents an isolated, containerized browser to use web applications. Sessions are ephemeral and end when their time-to-live expires. The agents act on tasks set by AWS customers, not by Amazon.
03 · Impact
Why Amazon-Bedrock-AgentCore-Browser matters for your site
If you allow it
- Agents may complete tasks for real users on your site
- AWS documents Web Bot Auth support to reduce CAPTCHAs
If you block it
- Traffic comes from many different customer agents with different goals
- Automated sessions can submit forms or scrape content
04 · Allow
How to allow Amazon-Bedrock-AgentCore-Browser
robots.txt
# Amazon-Bedrock-AgentCore-Browser has no documented robots.txt token and does not read robots.txt.
# Use a Cloudflare, nginx or Apache rule instead.Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "Amazon-Bedrock-AgentCore-Browser")
Action: Skip › All Super Bot Fight Mode rules
# Also check Security › Bots: "Block AI bots" can block it regardless of robots.txt.WordPress
# Amazon-Bedrock-AgentCore-Browser has no documented robots.txt token and does not read robots.txt.
# Use a Cloudflare, nginx or Apache rule instead.nginx
# nginx serves every user agent by default.
# Make sure no rule like this blocks it:
# if ($http_user_agent ~* "Amazon\-Bedrock\-AgentCore\-Browser") { return 403; }Apache
# Apache serves every user agent by default.
# Make sure .htaccess has no rule like this:
# RewriteCond %{HTTP_USER_AGENT} Amazon\-Bedrock\-AgentCore\-Browser [NC]
# RewriteRule .* - [F,L]05 · Block
How to block Amazon-Bedrock-AgentCore-Browser
Start with robots.txt. If Amazon-Bedrock-AgentCore-Browser keeps showing up in your logs, block it at your CDN or web server.
robots.txt
# Amazon-Bedrock-AgentCore-Browser has no documented robots.txt token and does not read robots.txt.
# Use a Cloudflare, nginx or Apache rule instead.Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "Amazon-Bedrock-AgentCore-Browser")
Action: BlockWordPress
# Amazon-Bedrock-AgentCore-Browser has no documented robots.txt token and does not read robots.txt.
# Use a Cloudflare, nginx or Apache rule instead.nginx
# In your server { } block:
if ($http_user_agent ~* "Amazon\-Bedrock\-AgentCore\-Browser") {
return 403;
}Apache
# .htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Amazon\-Bedrock\-AgentCore\-Browser [NC]
RewriteRule .* - [F,L]
</IfModule>06 · User agents
User agents we see for Amazon-Bedrock-AgentCore-Browser
| User agent | Share | Last active | Status |
|---|---|---|---|
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Amazon-Bedro… |
100% | Yesterday | Unverified |
07 · Verification
Is it really Amazon-Bedrock-AgentCore-Browser?
Amazon-Bedrock-AgentCore-Browser’s operator publishes no IP ranges or hostnames, so requests cannot be verified. Treat the user agent as a claim, and watch your logs for unusual request rates.
FAQ
Questions about Amazon-Bedrock-AgentCore-Browser
What is Amazon-Bedrock-AgentCore-Browser?
It is the user agent of the AgentCore Browser in Amazon Bedrock AgentCore. AI agents run by AWS customers use this browser to visit websites.
Is AgentCore Browser traffic from Amazon itself?
The infrastructure belongs to AWS, but the agents are built and run by AWS customers. Each agent decides which pages it visits.
Does AgentCore Browser run JavaScript?
Yes. It is a full browser environment that AI agents use to interact with web applications.
Last updated Oct 14, 2026