# Project Mariner

> Google · agentic-browsing

_The AI Crawler Registry · /crawlers/project-mariner · [JSON](/api/crawlers/project-mariner) · [all The AI Crawler Registry](/crawlers)_

- **name:** Project Mariner
- **operator:** Google
- **purpose:** agentic-browsing
- **ua_substring:** 
- **robots_token:** (none — agentic browser; no published robots.txt token; successor Google-Agent carries a token)
- **respects_robots:** no
- **verify:** no stable user-agent token for the standalone product; identifiable only by IP/signature/behavior. Its functionality moved into the Google-Agent fetcher, which is verifiable via user-triggered-agents.json + reverse DNS to google.com.
- **notes:** Google's Project Mariner (introduced Dec 2024 with Gemini 2.0) was an experimental web-browsing agent that navigated pages and took actions on a user's behalf via a Chrome extension. Google shut it down as a standalone product on 2026-05-04; its features moved into the Gemini API and Gemini Agent (see the Google-Agent record). Retained here as a deprecated agentic-browser record for history/freshness.
- **canonical_name:** Project Mariner
- **user_agent_token:** — (no-stable-ua)
- **ua_full:** — (no-stable-ua)
- **bot_type:** agentic-browser
- **bot_type_extension:** —
- **opt_out_mechanism:** — (not-applicable)
- **published_ip_range_url:** — (verify-against-primary-at-build)
- **asn:** — (verify-against-primary-at-build)
- **reverse_dns_suffix:** — (verify-against-primary-at-build)
- **supports_web_bot_auth:** — (not-applicable)
- **signature_agent_domain:** — (not-applicable)
- **jwks_url:** — (not-applicable)
- **verification_methods:** IP-signature
- **crawl_traffic_share:** — (not-applicable)
- **targeted_content_type:** HTML, text (interactive browsing)
- **documentation_url:** https://deepmind.google/technologies/project-mariner/
- **first_seen_date:** 2024-12 (source: https://deepmind.google/technologies/project-mariner/)
- **last_verified_date:** 2026-06-15
- **block_vs_allow_recommendation:** n/a — standalone product shut down on 2026-05-04; functionality moved into Gemini Agent / the Google-Agent fetcher. Manage the successor via that record.
- **citation_referral_value:** n/a (deprecated standalone; see Google-Agent successor)
- **cloudflare_verified_category:** — (not-applicable)
- **status:** deprecated
- **triples:** ["Project Mariner","operated_by","Google"], ["Project Mariner","has_bot_type","agentic-browser"], ["Project Mariner","succeeded_by","Google-Agent"]
- **attribute_sources:** {"claims":["operator","bot_type","documentation_url","status","first_seen_date"],"source":"https://deepmind.google/technologies/project-mariner/","last_verified":"2026-06-15"}