{
  "dataset": "crawlers",
  "record": {
    "id": "project-mariner",
    "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": false,
    "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": {
      "value": null,
      "verify_status": "no-stable-ua",
      "note": "no stable AI user-agent token for the standalone product; agentic browser"
    },
    "ua_full": {
      "value": null,
      "verify_status": "no-stable-ua",
      "source_hint": "https://deepmind.google/technologies/project-mariner/"
    },
    "bot_type": "agentic-browser",
    "bot_type_extension": null,
    "opt_out_mechanism": {
      "value": null,
      "verify_status": "not-applicable",
      "note": "no robots.txt token to target; agent acted in a browser session via a Chrome extension"
    },
    "published_ip_range_url": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://developers.google.com/search/docs/crawling-indexing/google-user-triggered-fetchers",
      "note": "the successor Google-Agent fetcher verifies against user-triggered-agents.json; the standalone Mariner product had no published AI-bot IP-range file"
    },
    "asn": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://www.gstatic.com/ipranges/goog.json"
    },
    "reverse_dns_suffix": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://developers.google.com/search/docs/crawling-indexing/verifying-googlebot"
    },
    "supports_web_bot_auth": {
      "value": null,
      "verify_status": "not-applicable",
      "note": "deprecated standalone product"
    },
    "signature_agent_domain": {
      "value": null,
      "verify_status": "not-applicable"
    },
    "jwks_url": {
      "value": null,
      "verify_status": "not-applicable"
    },
    "verification_methods": [
      "IP-signature"
    ],
    "crawl_traffic_share": {
      "value": null,
      "verify_status": "not-applicable",
      "note": "deprecated; not tracked as a distinct AI crawler share"
    },
    "targeted_content_type": "HTML, text (interactive browsing)",
    "documentation_url": "https://deepmind.google/technologies/project-mariner/",
    "first_seen_date": {
      "value": "2024-12",
      "source": "https://deepmind.google/technologies/project-mariner/",
      "last_verified": "2026-06-15",
      "note": "introduced December 2024 with Gemini 2.0; confirm exact day at build"
    },
    "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": {
      "value": null,
      "verify_status": "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"
      }
    ],
    "ua_substring_meta": {
      "value": null,
      "verify_status": "no-stable-ua",
      "note": "agentic browser: an experimental Gemini-powered web-browsing agent; no stable, distinctive AI user-agent token was published for the standalone product. Its successor, the Google-Agent user-triggered fetcher, carries a token."
    }
  }
}