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
3.91%
block GoogleAgent-Mariner
965K of 24.68 million domains with a known robots.txt policy
0.07%
block it by name
17,551 domains, the rest inherit a blanket
* block
<0.01%
restrict it by name
877 domains name it and close some of its paths
0.08%
name it in robots.txt
18,802 domains give it rules of their own
Data for Oct 2026. All four percentages
divide by the same 24.68 million domains. Blocked counts both
explicit User-agent: GoogleAgent-Mariner blocks and blanket
* blocks the crawler inherits.
Blocking trend
2%
4%
6%
Aug 2026
Sep 2026
Oct 2026
Share of domains with a known robots.txt policy
blocking GoogleAgent-Mariner in each monthly crawl. The denominator moves with each crawl and is
defined in the methodology.
Historical mentions, HTTP Archive
0.1%
Jul 2025
Nov 2025
Feb 2026
Jun 2026
Sep 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 |
|---|---|---|
| amazon.co.jp | 9.16/10 | Sep 2026 |
| amazon.de | 9.13/10 | Oct 2026 |
| usatoday.com | 9.08/10 | Oct 2026 |
| francetvinfo.fr | 8.87/10 | Sep 2026 |
| radiofrance.fr | 8.82/10 | Aug 2026 |
| francebleu.fr | 8.61/10 | Aug 2026 |
| videolan.org | 8.60/10 | Oct 2026 |
| franceculture.fr | 8.58/10 | Aug 2026 |
| imageshack.us | 8.54/10 | Aug 2026 |
| openstreetmap.fr | 8.54/10 | Oct 2026 |
| franceinter.fr | 8.50/10 | Aug 2026 |
| amazon.nl | 8.46/10 | Sep 2026 |
| primevideo.com | 8.45/10 | Aug 2026 |
| gentoo.org | 8.44/10 | Sep 2026 |
| refinery29.com | 8.43/10 | Oct 2026 |
| tf1.fr | 8.36/10 | Oct 2026 |
| sandiegouniontribune.com | 8.35/10 | Sep 2026 |
| opengroup.org | 8.32/10 | Oct 2026 |
| jsonline.com | 8.27/10 | Oct 2026 |
| themoviedb.org | 8.25/10 | Oct 2026 |
| beck.de | 8.24/10 | Sep 2026 |
| geocaching.com | 8.20/10 | Oct 2026 |
| imageshack.com | 8.13/10 | Aug 2026 |
| amazon.jp | 8.10/10 | Aug 2026 |
| ebird.org | 8.08/10 | Oct 2026 |
| nlb.gov.sg | 8.03/10 | Oct 2026 |
| amazon.sg | 8.01/10 | Oct 2026 |
| iospress.nl | 8.01/10 | Aug 2026 |
| derwesten.de | 8.00/10 | Aug 2026 |
| eventive.org | 7.99/10 | Oct 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.