Gemini-Deep-Research
Google Gemini deep research web crawler
About this crawler
Gemini-Deep-Research is a web crawler identified by the regular-expression pattern Gemini-Deep-Research in the User-Agent request header. It is categorised as ai-fetcher, search-engine. Use the regex above to detect, log, allow, or block Gemini-Deep-Research traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.59%
Technical details
- Name
- Gemini-Deep-Research
- Pattern
Gemini-Deep-Research- Tags
- ai-fetcher, search-engine
- Reference
- https://developers.google.com/crawling/docs/crawlers-fetchers/google-common-crawlers
- Added
- 2026/04/07
- rDNS suffixes
.1e100.net,.googlebot.com,.googleusercontent.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Gemini-Deep-Research with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.1e100.net.googlebot.com.googleusercontent.com
Sample User-Agent strings
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Gemini-Deep-Research; +https://gemini.google/overview/deep-research/) Chrome/135.0.0.0 Safari/537.36
Block this crawler
robots.txt — disallow Gemini-Deep-Research:
User-agent: Gemini-Deep-Research
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Gemini-Deep-Research [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Gemini-Deep-Research") {
return 403;
}
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