ClaudeBot Simulator & Claude Crawler Tester
Last updated
Simulate a ClaudeBot visit to any URL on your website. Crawl the page and inspect the HTML Claude gets, so it can read and cite your content.
Simulate a Anthropic visit
Enter any URL on your website to crawl it as Anthropic and inspect the HTML it gets.
How to use the Anthropic simulator
- Step 1
Enter a URL
Paste the full URL of any page on your website, such as a product page, a blog post, or the home page.
- Step 2
Select the Anthropic user agent
The tester sends the request with the Anthropic user-agent string, so your server answers the way it answers a real Anthropic visit.
- Step 3
Run the crawl
The simulator requests the page as Anthropic and follows redirects, the same way the crawler does.
- Step 4
Inspect the HTML
Check the status code, redirects, response headers, raw HTML, word count, and Open Graph tags Anthropic gets. If your main content is missing from the HTML, Anthropic cannot read it.
What is Anthropic?
ClaudeBot is Anthropic's web crawler used by Claude AI to access and understand web content. When users interact with Claude and reference URLs or ask questions that require web knowledge, Claude may use this crawler to fetch your content. Making your site accessible to ClaudeBot ensures Claude can accurately represent and cite your content in conversations.
Why allow Anthropic?
Anthropic robots.txt configuration
Control how Anthropic crawls your website using robots.txt directives. Add these rules to your robots.txt file at the root of your domain, then run the simulator again on the same URL to confirm the change.
Allow Anthropic
# Allow Claude/Anthropic crawler User-agent: ClaudeBot Allow: / User-agent: anthropic-ai Allow: / User-agent: Claude-Web Allow: /
Block Anthropic
# Block Claude/Anthropic crawler User-agent: ClaudeBot Disallow: / User-agent: anthropic-ai Disallow: / User-agent: Claude-Web Disallow: /
User-Agent String: ClaudeBot/1.0
Anthropic simulator FAQ
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