Anthropic . tier 1
ClaudeBot
Collects training data for Anthropic models.
509 of the 3,642 sites we measured deny ClaudeBot access to their root, which is 14.0% of the index.
How to allow or block it
A group naming the token wins outright over the wildcard group. It does not inherit from it, so rules set under User-agent: * do not carry over.
# Allow ClaudeBot everywhere
User-agent: ClaudeBot
Disallow:
# Block ClaudeBot entirely
User-agent: ClaudeBot
Disallow: /Sites blocking ClaudeBot
Most-visited first. Showing up to 100 of 509.
| Rank | Domain | Score | Answer-surface crawlers | Stack |
|---|---|---|---|---|
| 5 | facebook.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 14 | instagram.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 16 | twitter.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 17 | linkedin.com | Score 17 out of 100, grade F, partial assessment | 9 blocked | unidentified |
| 18 | mail.ru | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 31 | amazon.comrefused GPTBot | Score 15 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 47 | x.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 52 | pinterest.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 61 | myfritz.net | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 63 | tiktok.com | Score 15 out of 100, grade F | 11 blocked | unidentified |
| 71 | yahoo.comrefused GPTBot | Score 43 out of 100, grade D | 5 blocked | Next.js |
| 85 | baidu.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 87 | vimeo.com | Score 56 out of 100, grade D | 3 blocked | Next.js . Cloudflare |
| 103 | reddit.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 112 | chatgpt.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 121 | t-online.de | Score 55 out of 100, grade D | 5 blocked | Next.js . Amazon CloudFront |
| 126 | skybridge.click | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 158 | snapchat.com | Score 46 out of 100, grade D | 5 blocked | Next.js . Google Cloud / GFE |
| 159 | tumblr.com | Score 41 out of 100, grade D | 4 blocked | WordPress |
| 163 | nytimes.comrefused GPTBot | Score 21 out of 100, grade F, partial assessment | 11 blocked | Fastly |
| 180 | flickr.com | Score 42 out of 100, grade D, partial assessment | 6 blocked | unidentified |
| 188 | ebay.com | Score 60 out of 100, grade C, partial assessment | 5 blocked | Akamai |
| 191 | soundcloud.com | Score 31 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 193 | cnn.com | Score 31 out of 100, grade F | 9 blocked | Fastly |
| 196 | theguardian.com | Score 46 out of 100, grade D | 6 blocked | unidentified |
| 202 | medium.comrefused GPTBot | Score 46 out of 100, grade D | 4 blocked | Cloudflare |
| 218 | bbc.com | Score 31 out of 100, grade F | 10 blocked | Next.js . Fastly |
| 229 | forbes.comrefused GPTBot | Score 57 out of 100, grade D, partial assessment | 5 blocked | Fastly |
| 240 | bbc.co.uk | Score 34 out of 100, grade F | 10 blocked | Fastly |
| 263 | imdb.com | Score 9 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 280 | canva.comrefused GPTBot | Score 66 out of 100, grade C, partial assessment | 4 blocked | Cloudflare |
| 283 | reuters.com | Score 26 out of 100, grade F, partial assessment | 9 blocked | unidentified |
| 284 | launchpad.netrefused GPTBot | Score 20 out of 100, grade F | 9 blocked | unidentified |
| 293 | nature.com | Score 45 out of 100, grade D, partial assessment | 7 blocked | Fastly |
| 325 | weibo.com | Score 18 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 330 | amazon.co.ukrefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 344 | naver.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 372 | wsj.com | Score 31 out of 100, grade F, partial assessment | 8 blocked | unidentified |
| 385 | amazon.derefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 388 | bloomberg.comrefused GPTBot | Score 41 out of 100, grade D | 10 blocked | Next.js . Fastly |
| 430 | aol.com | Score 50 out of 100, grade D | 3 blocked | Next.js . Amazon CloudFront |
| 439 | gcdn.co | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 465 | pixabay.comrefused GPTBot | Score 67 out of 100, grade C, partial assessment | 4 blocked | Cloudflare |
| 476 | netcraze.io | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 477 | businessinsider.com | Score 74 out of 100, grade C | 1 blocked | Fastly |
| 478 | aliexpress.com | Score 71 out of 100, grade C, partial assessment | 3 blocked | Alibaba Cloud CDN |
| 481 | cnbc.comrefused GPTBot | Score 24 out of 100, grade F | 11 blocked | Akamai |
| 494 | amazon.co.jprefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 497 | quora.com | Score 13 out of 100, grade F, partial assessment | 10 blocked | unidentified |
| 498 | statista.comrefused GPTBot | Score 43 out of 100, grade D | 7 blocked | Amazon CloudFront |
| 529 | behance.netrefused GPTBot | Score 60 out of 100, grade C, partial assessment | 5 blocked | Fastly |
| 549 | ft.comrefused GPTBot | Score 53 out of 100, grade D, partial assessment | 6 blocked | Cloudflare |
| 552 | uol.com.br | Score 47 out of 100, grade D | 8 blocked | Amazon CloudFront |
| 566 | sohu.com | Score 8 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 574 | wired.com | Score 51 out of 100, grade D | 8 blocked | Cloudflare |
| 577 | tripadvisor.comrefused GPTBot | Score 63 out of 100, grade C, partial assessment | 4 blocked | Amazon CloudFront |
| 580 | edgecdn.ru | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 589 | threads.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 609 | dailymail.comrefused GPTBot | Score 35 out of 100, grade F | 11 blocked | Akamai |
| 622 | usatoday.com | Score 24 out of 100, grade F | 11 blocked | Sitecore |
| 626 | unesco.org | Score 80 out of 100, grade B | 4 blocked | Drupal |
| 630 | telegraph.co.uk | Score 37 out of 100, grade F | 10 blocked | Adobe Experience Manager . Fastly |
| 635 | nintendo.com | Score 48 out of 100, grade D | 5 blocked | Next.js . Fastly |
| 638 | techcrunch.com | Score 61 out of 100, grade C | 5 blocked | WordPress . Cloudflare |
| 642 | amazon.frrefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Akamai |
| 645 | amazon.carefused GPTBot | Score 15 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 655 | hstgr.net | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 676 | amazon.inrefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 677 | elpais.com | Score 51 out of 100, grade D, partial assessment | 5 blocked | unidentified |
| 692 | sharethrough.com | Score 14 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 698 | kick.comrefused GPTBot | Score 61 out of 100, grade C, partial assessment | 5 blocked | Cloudflare |
| 699 | lemonde.fr | Score 48 out of 100, grade D, partial assessment | 5 blocked | Fastly |
| 703 | yelp.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 707 | bandcamp.com | Score 46 out of 100, grade D | 4 blocked | Fastly |
| 708 | fb.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 713 | amazon.esrefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 723 | dailymail.co.ukrefused GPTBot | Score 35 out of 100, grade F | 11 blocked | Akamai |
| 730 | pinimg.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 732 | cookielaw.orgrefused GPTBot | Score 51 out of 100, grade D | 5 blocked | Adobe Experience Manager . Cloudflare |
| 733 | hihonorcloud.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 736 | amazon.itrefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Amazon CloudFront |
| 737 | quantserve.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 749 | cnet.com | Score 44 out of 100, grade D | 10 blocked | WordPress |
| 755 | globalsign.com | Score 56 out of 100, grade D | 5 blocked | Cloudflare |
| 757 | creativecdn.com | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 765 | imgsmail.ru | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 799 | apnews.comrefused GPTBot | Score 49 out of 100, grade D, partial assessment | 7 blocked | Cloudflare |
| 821 | airbnb.com | Score 59 out of 100, grade D | 3 blocked | unidentified |
| 825 | people.com | Score 35 out of 100, grade F, partial assessment | 8 blocked | Cloudflare |
| 828 | ted.com | Score 49 out of 100, grade D | 5 blocked | Next.js . Fastly |
| 850 | adform.net | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 852 | academia.edu | Score 48 out of 100, grade D, partial assessment | 6 blocked | unidentified |
| 857 | spiegel.de | Score 40 out of 100, grade D | 8 blocked | Google Cloud / GFE |
| 862 | ebay.de | Score 60 out of 100, grade C, partial assessment | 5 blocked | Akamai |
| 866 | theverge.com | Score 44 out of 100, grade D | 9 blocked | WordPress . Fastly |
| 871 | amazon.com.brrefused GPTBot | Score 15 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 875 | amazon.co.zarefused GPTBot | Score 16 out of 100, grade F, partial assessment | 10 blocked | Akamai |
| 876 | pexels.comrefused GPTBot | Score 72 out of 100, grade C, partial assessment | 3 blocked | Cloudflare |
| 880 | ebay.co.uk | Score 60 out of 100, grade C, partial assessment | 5 blocked | Akamai |
| 885 | daum.net | Score 6 out of 100, grade F, partial assessment | 11 blocked | unidentified |
Using these figures
Free to reuse in research, journalism or a product under CC BY 4.0, with credit to Fidget Labs BV. Quote the measurement date so the claim stays checkable as the index moves.
CrawlIndex by Fidget Labs BV. "Sites blocking ClaudeBot." https://crawlindex.org (measured 2026-11-07). Licensed CC BY 4.0.