User-triggered fetch · Anthropic
Claude-Web
An older Anthropic token that sites still block. It is not part of Anthropic's current documented set.
- Operator
- Anthropic
- Purpose
- User-triggered fetch
- Used for
- Legacy token
- Obeys robots.txt
- Unclear
- robots.txt token
Claude-Web- User-agent string
- Not published by the operator
- IP list
- Not published
- Official docs
- None published
Block Claude-Web in robots.txt
User-agent: Claude-Web
Disallow: /Blocking a search or user-triggered bot removes your pages from that assistant's answers. To opt out of model training only, block the operator's training crawler instead.
Well-known sites that block Claude-Web
amazon.com #30, yahoo.com #72, msn.com #92, chatgpt.com #112, snapchat.com #157, nytimes.com #163, cnn.com #195, bbc.com #216, sciencedirect.com #224, bbc.co.uk #236, canva.com #276, nature.com #297, amazon.co.uk #326, washingtonpost.com #383, bloomberg.com #386, amazon.de #387, aol.com #421, cnbc.com #474, amazon.co.jp #490, scribd.com #498, behance.net #525, uol.com.br #535, slideshare.net #550, ft.com #552
Other Anthropic bots
ClaudeBot (model training) · Claude-SearchBot (ai search index) · Claude-User (user-triggered fetch) · anthropic-ai (model training)
Questions
What is Claude-Web?
Claude-Web is a user-triggered fetch bot operated by Anthropic, used for Legacy token. An older Anthropic token that sites still block. It is not part of Anthropic's current documented set.
How do I block Claude-Web?
Add "User-agent: Claude-Web" followed by "Disallow: /" to the robots.txt file at the root of each host you want to protect.
Does Claude-Web respect robots.txt?
Anthropic has not clearly documented whether Claude-Web honours robots.txt.
How many websites block Claude-Web?
In a Oct 29, 2026 analysis of the top 10,000 websites by Kuldeep Paul, 13% of sites with a robots.txt file fully disallowed Claude-Web.
Analysis using this data
- Who blocks AI crawlers? What 10,000 robots.txt files revealPublishers block training, not answers; half of all blocklists leak; Cloudflare writes the most common AI policy.
- The opt-out asymmetry: you can block the small AI engines, not the big oneThe AI surfaces with the most users are the ones publishers can't refuse and can't measure.
How to cite this data
This dataset is free to use, including commercially, under Creative Commons Attribution 4.0. The one rule is attribution:
- Credit the source as “Kuldeep Paul, kuldeep.cc” wherever you use a figure, chart or table from it.
- Link to this page (https://kuldeep.cc/data/ai-search/crawlers/claude-web), not to the download file, so readers can check the source of every number.
- Include the date. These figures change; say “as of Oct 29, 2026” or link to the version you used.
- Mark changes. If you filter, recalculate or chart the data yourself, say so (“analysis based on data from…”).
- Cite the original source for single figures when you quote one reported number; it is linked in every row.
In running text: according to Kuldeep Paul's Claude-Web — AI crawler directory (kuldeep.cc). More in the methodology.
Paul, K. (2026). Claude-Web — AI crawler directory [Data set]. kuldeep.cc. https://kuldeep.cc/data/ai-search/crawlers/claude-web
Paul, Kuldeep. "Claude-Web — AI crawler directory." kuldeep.cc, 29 October 2026, https://kuldeep.cc/data/ai-search/crawlers/claude-web.
Paul, Kuldeep. 2026. "Claude-Web — AI crawler directory." Dataset. kuldeep.cc. Updated Oct 29, 2026. https://kuldeep.cc/data/ai-search/crawlers/claude-web.
@misc{paul2026claudeweb, author = {Paul, Kuldeep}, title = {Claude-Web — AI crawler directory}, year = {2026}, howpublished = {\url{https://kuldeep.cc/data/ai-search/crawlers/claude-web}}, note = {Dataset, CC BY 4.0, updated 2026-10-29} }
<a href="https://kuldeep.cc/data/ai-search/crawlers/claude-web">Claude-Web — AI crawler directory</a> (data: Kuldeep Paul, kuldeep.cc)