Webzio-Extended user agent
Operated by Webz.io
Webzio-Extended is a Webz.io token reported for controlling whether crawled data may be used for AI training.
The Webzio-Extended bot at a glance
- Webzio-Extended is operated by Webz.io and collects public web pages that may be used to train AI models.
- The robots.txt token for Webzio-Extended is Webzio-Extended.
- Blocking an AI training crawler has no effect on Google or Bing rankings.
- Webzio-Extended robots.txt support: Not documented.
- Recommendation for Generative Engine Optimization (GEO): Your choice.
What is Webzio-Extended?
Webzio-Extended is listed alongside omgilibot for Webz.io’s web data repository.
Its exact behaviour is not documented by Webz.io.
Should you block Webzio-Extended?
Blocking Webzio-Extended 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 Webzio-Extended
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 Webzio-Extended is matched case-insensitively. robots.txt alone may not stop Webzio-Extended, so add the Nginx, Apache or Cloudflare rule as well.
robots.txt: block
# Block Webzio-Extended
User-agent: Webzio-Extended
Disallow: /robots.txt: allow
# Allow Webzio-Extended
User-agent: Webzio-Extended
Allow: /robots.txt: partial
# Keep Webzio-Extended out of private areas only
User-agent: Webzio-Extended
Disallow: /wp-admin/
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Allow: /Nginx
# Nginx: return 403 to Webzio-Extended
if ($http_user_agent ~* "(Webzio\-Extended)") {
return 403;
}Apache
# Apache .htaccess: return 403 to Webzio-Extended
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} (Webzio\-Extended) [NC]
RewriteRule .* - [F,L]Cloudflare WAF
# Cloudflare > Security > WAF > Custom rule, action: Block
(http.user_agent contains "Webzio-Extended")How to verify real Webzio-Extended traffic
Webz.io publishes no IP list or reverse DNS pattern for Webzio-Extended, 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 Webzio-Extended in your server logs
Search the web server access log for the token. The command below counts Webzio-Extended requests per URL on Nginx or Apache.
grep -i "Webzio-Extended" 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.
Webzio-Extended FAQ
Webzio-Extended uses the robots.txt token "Webzio-Extended". Webz.io does not publish a full user-agent string, so match the token inside the User-Agent header.
Webz.io has not documented how Webzio-Extended 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: Webzio-Extended" followed by "Disallow: /". The token is case-insensitive. Changes can take up to 24 hours to be picked up.
Not reliably. Webz.io publishes no IP list or reverse DNS pattern for Webzio-Extended, so anyone can send the same user agent. Rate-limit unusual volume instead of trusting the name.
Search your server access log for "Webzio-Extended", for example with: grep -i "Webzio-Extended" 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.
