# Claude-User

Operator: Anthropic
Purpose: User-requested fetch
Reviewed: 2026-09-14
HTTP identifier: Claude-User
robots.txt token: Claude-User

## What is Claude-User?

Retrieves web content in response to Claude users.

## How to identify it

Look for the Claude-User identifier in a request’s User-Agent. This is a name match, not identity verification. Version strings may change.

## How to check identity

Compare the request IP with Anthropic’s current crawler list linked at https://claude.com/robots. The User-Agent alone does not authenticate the request.

## Access and robots.txt

Anthropic documents robots.txt controls for Claude-User. Apply rules on each host you manage; this setting is independent of its other crawler identities.

Optional full-site opt-out; merge with existing rules only if intended. Not a security control.

```text
User-agent: Claude-User
Disallow: /
```

## What it means in your analytics

This client retrieves pages for Claude user requests. Verify the source before interpreting a visit as an assistant interaction.

## Useful measures

Requested public pages; Public-page 403 and 404 responses; Subsequent page requests.

## What to check next

Separate public-page failures from security probes. Preserve the response, path and time before attributing a block to Claude.

## Sources

- [support.claude.com](https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler)
- [claude.com](https://claude.com/robots)

Operator facts are source-backed; interpretation and actions are Apostl guidance.

## Related profiles

- [ChatGPT-User](https://apostl.dev/bots/chatgpt-user)
- [Perplexity-User](https://apostl.dev/bots/perplexity-user)

[Start measuring agent traffic](https://apostl.dev/start/agent-analytics)