---
title: "Claude Duet cloud browser profile | Agent Ready Crawlers"
description: "Claude Duet cloud browser from Anthropic: robots.txt token Claude-Agent, purpose and what a site can check. Read 2026-11-04."
canonical: https://agentreadycrawlers.com/crawlers/claude-duet
site: "Agent Ready Crawlers"
last_updated: 2026-11-04
section: "Crawlers"
---

# Claude Duet cloud browser profile | Agent Ready Crawlers

> Claude Duet cloud browser from Anthropic: robots.txt token Claude-Agent, purpose and what a site can check. Read 2026-11-04.

Source: https://agentreadycrawlers.com/crawlers/claude-duet
Site: Agent Ready Crawlers
Last reviewed: 2026-11-04

Browsing agent from Anthropic

# Claude Duet cloud browser

In short

Claude Duet cloud browser is Anthropic's browsing agent. The token to write in robots.txt is Claude-Agent. The operator publishes nothing a site can check. The crawl of 2026-11-04 did not measure Claude-Agent. On robots.txt, Verisoul reports Anthropic says the agent aims to follow site rules; Anthropic's crawler page does not list it (checked 2026-11-04).

Operator

[Anthropic](https://agentreadycrawlers.com/crawlers/operator/anthropic/) Vendor profile: [Anthropic](https://agentreadycrawlers.com/vendors/anthropic/)

Purpose

Task agent [All task agent rows](https://agentreadycrawlers.com/crawlers/purpose/task-agent/). 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: Linux Chrome string with a "compatible; Claude-Agent/1.0" token, as observed by Verisoul (secondary)

robots.txt token

`Claude-Agent` Matched case-insensitively (RFC 9309). The token and the user-agent string are different things.

Respects robots.txt

Reported by a third party

Verisoul reports Anthropic says the agent aims to follow site rules; Anthropic's crawler page does not list it (checked 2026-11-04). [Source](https://www.verisoul.ai/agents/claude-duet), read 2026-11-04.

Verification

Nothing published

The operator publishes no list, reverse DNS pattern or key directory a site owner can check. [Documentation](https://www.verisoul.ai/agents/claude-duet), read 2026-11-04.

IP ranges

Not published.

Rate behaviour

Not published.

Block rate

Not measured: the crawl checked 31 AI and search tokens, and `Claude-Agent` is not one of them.

Documentation

[verisoul.ai](https://www.verisoul.ai/agents/claude-duet), read 2026-11-04.

Note. Duet launched 2026-10-21 as a waitlist research preview for US Pro and Max subscribers, per Verisoul. Token taken from observed traffic, not an Anthropic page; treat as unconfirmed.

## Allow and refuse lines

### To allow Claude-Agent

User-agent: Claude-Agent
Allow: /

### To refuse Claude-Agent

User-agent: Claude-Agent
Disallow: /

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](https://agentreadycrawlers.com/verification/).

IP lists

-   [claude.com/crawling/bots.json](https://claude.com/crawling/bots.json)

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)

## In the news

-   2026-10-21[Anthropic's Claude Duet starts browsing with a Claude-Agent token](https://agentreadycrawlers.com/news/2026-10-21-anthropic-s-claude-duet-starts-browsing-with-a-claude-agent/)

## Other Anthropic rows

-   [ClaudeBot](https://agentreadycrawlers.com/crawlers/claudebot/) Training token ClaudeBot
-   [Claude-User](https://agentreadycrawlers.com/crawlers/claude-user/) Live answer fetch token Claude-User
-   [Claude-SearchBot](https://agentreadycrawlers.com/crawlers/claude-searchbot/) Search index token Claude-SearchBot
-   [anthropic-ai (legacy token)](https://agentreadycrawlers.com/crawlers/anthropic-ai/) Training token anthropic-ai
-   [Claude in Chrome](https://agentreadycrawlers.com/crawlers/claude-in-chrome/) Task agent no token
-   [Claude computer use (API tool)](https://agentreadycrawlers.com/crawlers/claude-computer-use/) Task agent no token

## Sources

-   [verisoul.ai: claude duet](https://www.verisoul.ai/agents/claude-duet) read 2026-11-04
-   [Does Anthropic crawl data from the web, and how can site owners block the crawler?](https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler) read 2026-11-04

Last reviewed 2026-11-04