# Google-Extended

> Google · training

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

- **name:** Google-Extended
- **operator:** Google
- **purpose:** training
- **ua_substring:** (none — token only)
- **robots_token:** Google-Extended
- **respects_robots:** yes
- **verify:** not applicable — makes no HTTP requests
- **notes:** A robots.txt policy token, NOT a crawler. It makes no requests and never appears in logs; disallowing it opts your content out of Gemini/Vertex training while leaving Google Search crawling untouched.
- **canonical_name:** Google-Extended
- **user_agent_token:** Google-Extended
- **ua_full:** — (not-applicable)
- **bot_type:** opt-out-token
- **bot_type_extension:** —
- **opt_out_mechanism:** robots.txt disallow (User-agent: Google-Extended) — opts content out of Gemini/Vertex training
- **published_ip_range_url:** — (not-applicable)
- **asn:** — (not-applicable)
- **reverse_dns_suffix:** — (not-applicable)
- **supports_web_bot_auth:** — (not-applicable)
- **signature_agent_domain:** — (not-applicable)
- **jwks_url:** — (not-applicable)
- **verification_methods:** —
- **crawl_traffic_share:** — (not-applicable)
- **targeted_content_type:** — (not-applicable)
- **documentation_url:** https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers
- **first_seen_date:** — (verify-against-primary-at-build)
- **last_verified_date:** 2026-06-15
- **block_vs_allow_recommendation:** decision token — disallow to opt out of Gemini/Vertex training without affecting Google Search ranking; there is no traffic to block.
- **citation_referral_value:** n/a (policy token, not a fetcher)
- **cloudflare_verified_category:** — (not-applicable)
- **status:** active
- **triples:** ["Google-Extended","operated_by","Google"], ["Google-Extended","has_bot_type","opt-out-token"], ["Google-Extended","controls_opt_out_for","Gemini/Vertex training"]
- **attribute_sources:** {"claims":["robots_token","bot_type","opt_out_mechanism","respects_robots"],"source":"https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers","last_verified":"2026-06-15"}