Leikibot user agent
Operated by DoubleVerify
Leikibot is a contextual classification crawler now operated by DoubleVerify.
The Leikibot bot at a glance
- Leikibot is operated by DoubleVerify and checks landing pages for an advertising platform.
- The robots.txt token for Leikibot is Leikibot.
- Blocking a platform fetcher has no effect on organic search rankings.
- Leikibot robots.txt support: Not documented.
- Recommendation for Generative Engine Optimization (GEO): Your choice.
What is Leikibot?
Leikibot reads page content so DoubleVerify can classify it for brand safety and contextual targeting.
Ad-supported publishers often see it in their logs.
Should you block Leikibot?
Blocking Leikibot is a business decision: it protects your content but can lower how well AI products know your brand.
| Effect on search rankings | Blocking a platform fetcher has no effect on organic search rankings. |
|---|---|
| Effect on AI visibility | Blocking breaks the feature the fetcher serves, such as ad approval or feed updates. |
| Follows robots.txt | Not documented |
| Recommendation | Your choice |
How to block or allow Leikibot
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 Leikibot is matched case-insensitively. robots.txt alone may not stop Leikibot, so add the Nginx, Apache or Cloudflare rule as well.
robots.txt: block
# Block Leikibot
User-agent: Leikibot
Disallow: /robots.txt: allow
# Allow Leikibot
User-agent: Leikibot
Allow: /robots.txt: partial
# Keep Leikibot out of private areas only
User-agent: Leikibot
Disallow: /wp-admin/
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Allow: /Nginx
# Nginx: return 403 to Leikibot
if ($http_user_agent ~* "(Leikibot)") {
return 403;
}Apache
# Apache .htaccess: return 403 to Leikibot
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} (Leikibot) [NC]
RewriteRule .* - [F,L]Cloudflare WAF
# Cloudflare > Security > WAF > Custom rule, action: Block
(http.user_agent contains "Leikibot")How to verify real Leikibot traffic
DoubleVerify publishes no IP list or reverse DNS pattern for Leikibot, 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 Leikibot in your server logs
Search the web server access log for the token. The command below counts Leikibot requests per URL on Nginx or Apache.
grep -i "Leikibot" 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.
Leikibot user agent string
The full user agent DoubleVerify publishes for Leikibot. Version numbers such as Chrome/W.X.Y.Z change over time, so match the token, not the whole string.
Mozilla/5.0 (Windows NT 6.3;compatible; Leikibot/1.0; +http://www.leiki.com)Leikibot FAQ
Leikibot identifies itself with the robots.txt token "Leikibot". A typical request header reads: Mozilla/5.0 (Windows NT 6.3;compatible; Leikibot/1.0; +http://www.leiki.com)
DoubleVerify has not documented how Leikibot treats robots.txt. Add a robots.txt rule and back it with a server rule if the traffic matters to you.
Blocking a platform fetcher has no effect on organic search rankings. Blocking breaks the feature the fetcher serves, such as ad approval or feed updates.
Add two lines to the robots.txt file at the root of each domain and subdomain: "User-agent: Leikibot" followed by "Disallow: /". The token is case-insensitive. Changes can take up to 24 hours to be picked up.
Not reliably. DoubleVerify publishes no IP list or reverse DNS pattern for Leikibot, so anyone can send the same user agent. Rate-limit unusual volume instead of trusting the name.
Search your server access log for "Leikibot", for example with: grep -i "Leikibot" 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.
