What is GoogleAgent-Mariner?
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 behalf of a human user. You can set up Agent Analytics to see when GoogleAgent-Mariner visits your website.
Overview
| Operated By | |
| Source | Official Website |
| Expected To Follow Robots.txt | No |
| Insights Last Updated | September 15, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
GoogleAgent-Mariner operates a real browser, loading pages, running JavaScript, setting cookies, and navigating multi-step flows much like a person would. Because its route reflects the task it was given rather than a fixed crawl order, visits may look irregular. A session may pause while the agent processes a page, then continue somewhere unexpected.
GoogleAgent-Mariner's User Agent
| User Agent | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; GoogleAgent-Mariner) Chrome/149.0.7827.196 Safari/537.36 |
How To Block GoogleAgent-Mariner With Robots.txt
Add this rule to your robots.txt file to request that GoogleAgent-Mariner not access your website, or use Automatic Robots.txt to request the same of all AI agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: GoogleAgent-Mariner # https://knownagents.com/agents/googleagent-mariner
Disallow: /Insights for GoogleAgent-Mariner
As of September 15, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
8% of top websites block GoogleAgent-Mariner in their robots.txts.
Overall AI Agent Traffic
0.0% of all web traffic came from AI agents.
Frequently Asked Questions
Should I Block GoogleAgent-Mariner?
Usually not. GoogleAgent-Mariner browses on behalf of a person trying to read, compare, or buy something on your site. Blocking it may prevent that person from completing the task and send them elsewhere. It does not affect traditional search rankings. For context, 8% of the top websites we track currently have robots.txt rules for GoogleAgent-Mariner.
Does GoogleAgent-Mariner Follow Robots.txt Rules?
No. GoogleAgent-Mariner is not expected to follow robots.txt rules, so a disallow rule only communicates your preference. Enforce the block with firewall or server rules, then use Agent Analytics to verify that its requests stop.
Does GoogleAgent-Mariner Access Private Content?
Possibly, if a user grants access. GoogleAgent-Mariner operates a real browser session, so when someone signs in through it, the agent can see anything available to that account. Without credentials, it can reach only what an anonymous visitor can.
How Can I Tell if GoogleAgent-Mariner Is Visiting My Website?
Agent Analytics tracks GoogleAgent-Mariner visits in real time. You can also check your server logs for requests whose user-agent string contains "GoogleAgent-Mariner". Look for browser-like sessions that move through pages faster or more methodically than a typical person. Because GoogleAgent-Mariner does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is GoogleAgent-Mariner Visiting My Website?
A user gave GoogleAgent-Mariner a task that your site may help complete, such as researching a product, comparing options, or filling out a form. It likely reached your site through links or search results, much like a person would.