Browsing agent from Anthropic
Claude in Chrome
In short
Claude in Chrome is Anthropic's browsing agent. Claude in Chrome has no robots.txt token, so robots.txt cannot address it and the crawl cannot measure a block rate. The operator publishes nothing a site can check. Browser extension; Anthropic documents user-side controls only. No robots.txt behaviour or site-side opt-out is documented on the Anthropic pages read (checked 2026-11-04).
- Operator
- Anthropic
- Purpose
- Task agent All task agent rows. A browsing agent that clicks, fills forms and finishes a job for a person.
- User-agent string
- No exact string is published. What the operator or a third party says: The user's own Chrome user agent; no agent token
- robots.txt token
- None. No robots.txt line can address this agent.
- Respects robots.txt
No statement
No robots.txt behaviour or site-side opt-out is documented on the Anthropic pages read (checked 2026-11-04). Source, read 2026-11-04.
- Verification
Nothing published
The operator publishes no list, reverse DNS pattern or key directory a site owner can check. Documentation, read 2026-11-04.
- IP ranges
- Not published.
- Rate behaviour
- Runs in the user's browser with the user's tabs, sign-ins and IP address.
- Block rate
-
None: the agent has no token, so a robots.txt block rate does not exist.
- Documentation
- claude.com, read 2026-11-04.
Note. Browser extension; Anthropic documents user-side controls only. Third-party detection vendors flag it by behaviour, not identity (https://www.centinelanalytica.com/blog/ai-browser-agents).
Allow and refuse lines
This agent has no robots.txt token, so there are no lines to copy. Without a token, a published list or a signature, a site owner cannot tell it from an ordinary visitor by request alone.
Refusing or allowing in robots.txt states a preference. For this row the operator or its documentation says robots.txt may not govern the fetch, so enforcement belongs in your WAF.
Anthropic in the Verification Ledger
One shared IP list for all three bots; no key directory at claude.ai or claude.com (404, 2026-11-04); nothing for Claude in Chrome. All operators.
- IP lists
- Reverse DNS
- publishes nothing
- Key directory
- publishes nothing
- Cloudflare
- not confirmed on Radar (directory slug not found, 2026-11-04)
- Visa TAP registry
- no public operator-level registration found (checked 2026-11-04)
- Mastercard Agent Pay
- no public operator-level registration found (checked 2026-11-04)
Other Anthropic rows
- ClaudeBot Training
- Claude-User Live answer fetch
- Claude-SearchBot Search index
- anthropic-ai (legacy token) Training
- Claude Duet cloud browser Task agent
- Claude computer use (API tool) Task agent
Sources
Last reviewed 2026-11-04