Websites blocking GoogleAgent-Mariner
The user-agent of Google's agentic browsing project Mariner, which navigates sites on behalf of a user completing a task.
Operated by Google · User-request fetcher · operator documentation
3.57%
block GoogleAgent-Mariner
889K of 24.91 million domains with a known robots.txt policy
0.07%
block it by name
16,302 domains, the rest inherit a blanket
* block
<0.01%
restrict it by name
823 domains name it and close some of its paths
0.07%
name it in robots.txt
17,482 domains give it rules of their own
Data for Aug 2026. All four percentages
divide by the same 24.91 million domains. Blocked counts both
explicit User-agent: GoogleAgent-Mariner blocks and blanket
* blocks the crawler inherits.
Historical mentions, HTTP Archive
0.1%
Jul 2025
Oct 2025
Jan 2026
Apr 2026
Jul 2026
Share of sites in each month's
HTTP Archive crawl whose robots.txt named
GoogleAgent-Mariner. This series counts
mentions only (the archive keeps no rule text), comes from a different population than our own
crawl above, and the two are never merged.
High-authority sites blocking GoogleAgent-Mariner by name
| Domain | OPROpen Page Rank | Blocking since |
|---|---|---|
| usatoday.com | 9.08/10 | Aug 2026 |
| congress.gov | 9.05/10 | Aug 2026 |
| lefigaro.fr | 8.95/10 | Aug 2026 |
| amazon.it | 8.78/10 | Aug 2026 |
| fedoraproject.org | 8.62/10 | Aug 2026 |
| francebleu.fr | 8.61/10 | Aug 2026 |
| franceculture.fr | 8.58/10 | Aug 2026 |
| imageshack.us | 8.54/10 | Aug 2026 |
| nzherald.co.nz | 8.51/10 | Aug 2026 |
| franceinter.fr | 8.50/10 | Aug 2026 |
| primevideo.com | 8.45/10 | Aug 2026 |
| freep.com | 8.37/10 | Aug 2026 |
| sandiegouniontribune.com | 8.35/10 | Aug 2026 |
| tf1info.fr | 8.35/10 | Aug 2026 |
| dispatch.com | 8.23/10 | Aug 2026 |
| amazon.se | 8.20/10 | Aug 2026 |
| imageshack.com | 8.13/10 | Aug 2026 |
| amazon.pl | 8.11/10 | Aug 2026 |
| amazon.jp | 8.10/10 | Aug 2026 |
| gvsu.edu | 8.08/10 | Aug 2026 |
| ebird.org | 8.08/10 | Aug 2026 |
| tv2.dk | 8.05/10 | Aug 2026 |
| iospress.nl | 8.01/10 | Aug 2026 |
| derwesten.de | 8.00/10 | Aug 2026 |
| netbsd.org | 7.97/10 | Aug 2026 |
| jwz.org | 7.96/10 | Aug 2026 |
| courier-journal.com | 7.96/10 | Aug 2026 |
| amazon.ae | 7.91/10 | Aug 2026 |
| jogtar.hu | 7.91/10 | Aug 2026 |
| tu.berlin | 7.87/10 | Aug 2026 |
Sites whose robots.txt names GoogleAgent-Mariner (or a legacy
alias) with a full block, ranked by Open Page Rank. Sites blocking every crawler with a blanket
* rule are counted above but not listed here. Since dates start at our first
observation of the rule.