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. You can set up Agent Analytics to see when Claude-Web visits your website.
Overview
| Operated By | Anthropic |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | September 15, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
Claude-Web has no reliable traffic profile. Its crawl rate and targeting may change without notice, so the patterns recorded in Agent Analytics are the best guide to its behavior.
Claude-Web's User Agent
| User Agent | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (Claude-Web) Chrome/131.0.0.0 Safari/537.36 |
How To Block Claude-Web With Robots.txt
Add this rule to your robots.txt file to block Claude-Web from accessing your 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: /Insights for Claude-Web
As of September 15, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
18% of top websites block Claude-Web in their robots.txts.
Overall Undocumented AI Agent Traffic
0.0% of all web traffic came from undocumented AI agents.
Frequently Asked Questions
Should I Block Claude-Web?
Be cautious. Anthropic has not stated why Claude-Web visits, so any benefit is difficult to weigh against the cost. Block it if the traffic is excessive or targets content you do not want collected. Doing so does not affect traditional search rankings. For context, 18% of the top websites we track currently 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 appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether Claude-Web respects it.
Does Claude-Web Access Private Content?
Unknown. No access boundaries have been published for Claude-Web. Assume it can read anything publicly reachable, and make sure sensitive areas require authentication.
How Can I Tell if Claude-Web Is Visiting My Website?
Agent Analytics tracks Claude-Web visits in real time. You can also check your server logs for requests whose user-agent string contains "Claude-Web". Compare its volume and targets over time; sudden changes may reveal a shift in purpose. Because Claude-Web does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is Claude-Web Visiting My Website?
Anthropic has not disclosed why it visits. Possibilities include training-data collection, index building, or an unannounced experiment. Its request pattern is the best available clue to its purpose.