GoogleAgent-Mariner

Operator

Google Inc.

Type

AI Agent

Official page

developers.google.com

robots.txt token

GoogleAgent-Mariner

In Vireo

Excluded, reported under AI crawlers

What it does

GoogleAgent-Mariner is an AI agent created by Google that can use a web browser. It can intelligently navigate and interact with websites to complete multi-step tasks on ...

ai.robots.txt describes its function as: AI Agents

Source: ai.robots.txt.

User agent

Requests from GoogleAgent-Mariner carry a user agent like this:

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; GoogleAgent-Mariner; +https://developers.google.com/search/docs/crawling-indexing/google-agent-mariner) Chrome/135.0.0.0 Safari/537.36

Device Detector identifies it with this pattern (a case-insensitive regular expression):

GoogleAgent-Mariner

Anyone can put any name in a user agent. Where the operator publishes IP ranges, checking the request's address against them is the way to confirm a visit is genuine.

How to block or allow GoogleAgent-Mariner

Add a group for its token to the robots.txt file at the root of your site. To keep it out of the whole site:

User-agent: GoogleAgent-Mariner
Disallow: /

To let it crawl everything, use an empty Disallow: or Allow: / instead. WordPress serves a virtual robots.txt that many SEO plugins let you edit. A real robots.txt file uploaded to the site root takes its place.

robots.txt is a request, so it only works on crawlers that honour it. A bot that ignores it has to be blocked at the server or firewall, by user agent or IP address.

How Vireo counts GoogleAgent-Mariner

Vireo keeps requests from GoogleAgent-Mariner out of your pageviews and visitors and counts them on its bot report under AI crawlers, so you can see how much it left out rather than wonder why your server logs show more traffic.

Because it's an AI crawler, its requests also count toward the pages AI crawlers took, which Vireo shows next to the readers AI assistants sent back. See how the AI assistants card works.

Checked by running Vireo Analytics' own bot filter over GoogleAgent-Mariner's user agents.

Sources

• GoogleAgent-Mariner information page (developers.google.com)
• Matomo Device Detector, bots.yml (LGPL-3.0)
• ai.robots.txt (MIT)