What is GoogleAgent-Mariner? AI crawler guide
GoogleAgent-Mariner is a crawler or fetcher associated with Google. See source-graded user-agent, robots.txt, verification, and observation guidance.
What is GoogleAgent-Mariner?
GoogleAgent-Mariner is a reported crawler or fetcher string associated with Google, but current operator evidence is incomplete. Google AI agent token associated with browser-style task execution.
Evidence status
| Field | Value |
|---|---|
| Evidence | Reported, not operator verified |
| Lifecycle | Status uncertain |
| Purpose | interaction |
| robots.txt posture | unverified |
| Source checked | 2026-06-11 |
Reported user-agent
GoogleAgent-Mariner
GoogleAgent-Mariner access decides whether Google can fetch your pages. Whether those pages get used in generated answers is a separate question, so track your presence in Google's AI results rather than treating crawl volume as visibility.
robots.txt allow example
User-agent: GoogleAgent-Mariner Allow: /
robots.txt block example
User-agent: GoogleAgent-Mariner Disallow: /
What the rule can and cannot do
Robots.txt expresses an access policy to compliant automated crawlers. It does not authenticate the sender, remove content already collected, or guarantee that a model will use or not use content.
How to verify a request
- Match the complete documented user-agent where one exists. A match is only a clue.
- Look for operator-published IP ranges, reverse DNS, or signed-request guidance. None is attached to this record.
- Keep the observed request, operator documentation, and any inference as separate fields.
JavaScript behavior
The cited operator material does not verify JavaScript rendering. Serve useful HTML before client-side JavaScript where possible.
Related bots
- NovaAct: Also tracked as a live fetcher.
- AmazonBuyForMe: Also tracked as a live fetcher.
- Google-Gemini-CLI: Another Google live fetcher to compare.
- Claude-Code: Also tracked as a live fetcher.
- Gemini-Deep-Research: Another Google live fetcher to compare.
- Claude-Web: Also tracked as a live fetcher.
- ChatGPT Agent: Also tracked as a live fetcher.
- Meta-ExternalFetcher: Also tracked as a live fetcher.
- Google-NotebookLM: Another Google live fetcher to compare.
- Gemini 2.0: GoogleAgent-Mariner gives crawler context for Gemini 2.0.
- Google Assistant: GoogleAgent-Mariner connects this operator term to its crawler behavior.
Frequently Asked Questions
What is GoogleAgent-Mariner?
GoogleAgent-Mariner is a reported, not operator verified crawler or fetcher record associated with Google.
What user-agent does GoogleAgent-Mariner use?
GoogleAgent-Mariner. Check the evidence status before attributing a matching request.
Can GoogleAgent-Mariner be blocked in robots.txt?
The record identifies GoogleAgent-Mariner as the token to review. Robots.txt is a request policy, not proof of model use or non-use.
How can I verify a GoogleAgent-Mariner request?
Treat the user-agent as a clue and look for operator-published IP, reverse-DNS, or signature guidance.
Data & Sources
- GoogleAgent-Mariner source reference - Source used to verify GoogleAgent-Mariner.