What is Claude-Web?
Claude-Web is an AI-related agent operated by Anthropic. It's currently unclear exactly what it's used for, since there's no official documentation. Agent Analytics can track when it visits your website.
Overview
| Operated By | Anthropic |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 19, 2026 |
Category
Expected Behavior
Nobody outside Anthropic knows how Claude-Web is supposed to behave. There is no documentation covering its crawl rate, targeting, or purpose, and undocumented agents sometimes turn out to be experiments or leftovers that were never switched off. Whatever pattern shows up in Agent Analytics is the only reliable description of it.
Claude-Web's User Agent
| User Agent | Mozilla/5.0 (compatible; Claude-Web/1.0; +https://www.anthropic.com) |
How To Block Claude-Web With Robots.txt
Add this rule to your robots.txt file to block Claude-Web from accessing your entire website, or use Automatic Robots.txt to block all undocumented AI agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Claude-Web # https://knownagents.com/agents/claude-web
Disallow: /Global Insights for Claude-Web
As of July 19, 2026, 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.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
13% of top websites block Claude-Web in their robots.txt files.
Overall Undocumented AI Agent Traffic
0.0% of all web traffic came from undocumented AI agents.
Top Visited Website Categories
The types of websites most frequently visited by Claude-Web.
Frequently Asked Questions
Should I Block Claude-Web?
Be skeptical. Anthropic has not documented what Claude-Web collects or why, so you cannot weigh any benefit against the cost. Assume collected content can end up in AI training data, and block it if its traffic gets heavy. Blocking it will not change your search rankings. For comparison, 13% of the top websites we track already have robots.txt rules for Claude-Web.
Does Claude-Web Follow Robots.txt Rules?
Yes. Claude-Web is expected to follow 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-Web actually follows it.
Does Claude-Web Access Private Content?
Unknown. Without documentation there is no stated boundary and no way to hold the operator to one. Assume Claude-Web reads anything publicly reachable, and verify that your sensitive areas actually require authentication.
Why Is Claude-Web Visiting My Website?
There is no documented answer. The realistic possibilities are training data collection, index building, or an experiment Anthropic has not announced. Claude-Web's request pattern on your site is the best clue you will get.
How Can I Tell if Claude-Web Is Visiting My Website?
Agent Analytics tracks Claude-Web 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-Web". Watch both its volume and its targets, since neither is documented. Keep in mind that Claude-Web 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.