What is Claude-User?
Claude-User is dispatched by Anthropic's Claude AI assistant in response to user prompts, when it needs to fetch content to include in its answers. Agent Analytics can track when it visits your website.
Category
Expected Behavior
Claude-User fetches one page at a time, the moment someone asks a question it can answer, so it never crawls your site. How much you see depends on how many people use Claude-User and how often they ask about what your site covers. A popular assistant can hit you steadily, while a single user or a niche one stays quiet between occasional spikes.
Overview
| Operated By | Anthropic |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 7, 2026 |
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
As of July 7, 2026, 9% of top websites block Claude-User in their robots.txt files.
Overall AI Assistant Traffic
As of July 7, 2026, 1.2% of all web traffic came from AI assistants.
Top Visited Website Categories
This data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Claude-User's User Agent
| User Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-User/1.0; +claude-user@anthropic.com) |
Access other known user agents and IP addresses using the Enterprise API.
How To Block Claude-User
Add this rule to your robots.txt file to block Claude-User from accessing your entire website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Claude-User # https://knownagents.com/agents/claude-user
Disallow: /Frequently Asked Questions
Should I Block Claude-User?
Probably not. Claude-User fetches a page when someone asks a question it can answer, and the response cites and links to your site. Blocking it removes you from those answers without improving your Google rankings, because assistants play no part in traditional search indexing. For comparison, 9% of the top websites we track already have robots.txt rules for Claude-User.
Does Claude-User Respect Robots.txt?
Yes. Claude-User is expected to honor robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms Claude-User actually honors it.
Does Claude-User Access Private Content?
It has no way in. Claude-User fetches pages the way an anonymous visitor loads a URL, with no stored logins. Anything behind a paywall or a login stays out of its reach.
Why Is Claude-User Visiting My Website?
Someone asked Anthropic's assistant a question your page can help answer. Claude-User retrieved the page in that moment to ground the answer, usually with a citation linking back to you.
How Can I Tell if Claude-User Is Visiting My Website?
Agent Analytics tracks Claude-User visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "Claude-User". Look for fetches of individual pages that do not follow a crawl pattern. Keep in mind that Claude-User doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.