What is Google-Agent?
Google-Agent is Google's user-triggered fetcher. A user-triggered fetcher runs when a person asks an AI product to open a page, not on a schedule. From the operator's wording: agents hosted on Google infrastructure act on user request.
| Operator | |
|---|---|
| Purpose (operator wording) | user-triggered fetch (agents hosted on Google infrastructure act on user request) |
| robots.txt token | Google-Agent |
| User agent string | Desktop: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; Google-Agent; +https://developers.google.com/crawling/docs/crawlers-fetchers/google-agent) Chrome/W.X.Y.Z Safari/537.36 |
| Respects robots.txt | No (Google: user-triggered fetchers generally ignore robots.txt) |
| IP ranges | https://developers.google.com/static/crawling/ipranges/user-triggered-agents.json |
| Last verified |
What else should I know about Google-Agent?
What is the Google-Agent user agent string?
This is the user agent string Google documents for Google-Agent, as of October 29, 2026. Version numbers and details can change, so match on the token in robots.txt, not on the whole string.
Desktop: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; Google-Agent; +https://developers.google.com/crawling/docs/crawlers-fetchers/google-agent) Chrome/W.X.Y.Z Safari/537.36How do I block Google-Agent in robots.txt?
Google documents no robots.txt token for Google-Agent, so we have no verified lines to show. Block lines are not stated.
How do I opt out of Google training but stay in its search?
Each Google user agent has its own token, so you can set them one by one. This file blocks Google-Extended and allows Googlebot. Every line comes from the rows in this dataset. Whether allowing a bot keeps you in a product is Google's call, so check each crawler's page.
User-agent: Google-Extended
Disallow: /
User-agent: Googlebot
Allow: /Does blocking Google-Agent affect AI answers?
Google does not say what blocking Google-Agent changes. That is not stated.
Each other Google user agent has its own robots.txt token, so a rule for Google-Agent does not cover them. See the related crawlers below.
Does Google-Agent follow robots.txt?
No. Google: user-triggered fetchers generally ignore robots.txt. Google user-triggered fetchers page: they 'generally ignore robots.txt rules' because the fetch was requested by a user.
Robots.txt is a request, not a lock (RFC 9309).
What IP addresses does Google-Agent use?
Google publishes a list at https://developers.google.com/static/crawling/ipranges/user-triggered-agents.json. We did not download or parse it. A request that claims to be Google-Agent but comes from outside that list is not Google-Agent.
Which other Google crawlers are there?
What should I read next?
Next: give AI tools something to quote
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