YiBot user agent
Operated by 01.AI
YiBot is the crawler of 01.AI, reported as gathering web content for the Yi language models.
The YiBot bot at a glance
- YiBot is operated by 01.AI and collects public web pages that may be used to train AI models.
- The robots.txt token for YiBot is YiBot.
- Blocking an AI training crawler has no effect on Google or Bing rankings.
- YiBot robots.txt support: Not documented.
- Recommendation for Generative Engine Optimization (GEO): Your choice.
What is YiBot?
01.AI, founded by Kai-Fu Lee, builds the Yi series of open models.
01.AI has not published a crawler page for YiBot.
Should you block YiBot?
Blocking YiBot is a business decision: it protects your content but can lower how well AI products know your brand.
| Effect on search rankings | Blocking an AI training crawler has no effect on Google or Bing rankings. |
|---|---|
| Effect on AI visibility | Blocking keeps your future pages out of that company's training data, so its models may know less about your brand over time. It does not remove you from that company's AI search, which uses a separate bot. |
| Follows robots.txt | Not documented |
| Recommendation | Your choice |
How to block or allow YiBot
Put the robots.txt rule in the file at the root of every domain and subdomain, for example https://example.com/robots.txt. The token YiBot is matched case-insensitively. robots.txt alone may not stop YiBot, so add the Nginx, Apache or Cloudflare rule as well.
robots.txt: block
# Block YiBot
User-agent: YiBot
Disallow: /robots.txt: allow
# Allow YiBot
User-agent: YiBot
Allow: /robots.txt: partial
# Keep YiBot out of private areas only
User-agent: YiBot
Disallow: /wp-admin/
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Allow: /Nginx
# Nginx: return 403 to YiBot
if ($http_user_agent ~* "(YiBot)") {
return 403;
}Apache
# Apache .htaccess: return 403 to YiBot
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} (YiBot) [NC]
RewriteRule .* - [F,L]Cloudflare WAF
# Cloudflare > Security > WAF > Custom rule, action: Block
(http.user_agent contains "YiBot")How to verify real YiBot traffic
01.AI publishes no IP list or reverse DNS pattern for YiBot, so the user agent cannot be verified. Anyone can send the same string. Rate-limit unusual volume instead of trusting the name.
How to find YiBot in your server logs
Search the web server access log for the token. The command below counts YiBot requests per URL on Nginx or Apache.
grep -i "YiBot" access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head -20For a full report per AI bot, upload the log to the AI Log File Analyzer, a free tool by Justin Hà.
YiBot FAQ
YiBot uses the robots.txt token "YiBot". 01.AI does not publish a full user-agent string, so match the token inside the User-Agent header.
01.AI has not documented how YiBot treats robots.txt. Add a robots.txt rule and back it with a server rule if the traffic matters to you.
Blocking an AI training crawler has no effect on Google or Bing rankings. Blocking keeps your future pages out of that company's training data, so its models may know less about your brand over time. It does not remove you from that company's AI search, which uses a separate bot.
Add two lines to the robots.txt file at the root of each domain and subdomain: "User-agent: YiBot" followed by "Disallow: /". The token is case-insensitive. Changes can take up to 24 hours to be picked up.
Not reliably. 01.AI publishes no IP list or reverse DNS pattern for YiBot, so anyone can send the same user agent. Rate-limit unusual volume instead of trusting the name.
Search your server access log for "YiBot", for example with: grep -i "YiBot" access.log. The AI Log File Analyzer by Justin Hà counts visits per AI bot from an uploaded log file.
Sources: Public bot registry. Last reviewed by Justin Hà.
See which of these bots actually reach your website
The AI Log File Analyzer by Justin Hà counts visits from GPTBot, ClaudeBot, PerplexityBot and other AI crawlers in your server log, for free. The GEO Technical Package sets up robots.txt, llms.txt and crawler access for AI search.
