{ "entity_a": { "slug": "google-extended", "name": "Google-Extended" }, "entity_b": { "slug": "googleother", "name": "GoogleOther" }, "fields_documented": 11, "claims": 17, "last_verified": "2026-09-15", "fields": [ { "field": "honours_crawl_delay", "value_a": "n/a", "value_b": "no", "claim_id_a": 56, "claim_id_b": 72, "same": false }, { "field": "observed_fetches_robots_txt", "value_a": null, "value_b": "no", "claim_id_a": null, "claim_id_b": 147, "same": false }, { "field": "observed_requested_mcp_endpoint", "value_a": null, "value_b": "yes", "claim_id_a": null, "claim_id_b": 146, "same": false }, { "field": "publishes_ip_list", "value_a": "no", "value_b": "yes", "claim_id_a": 57, "claim_id_b": 73, "same": false }, { "field": "purpose_documented", "value_a": "policy_only", "value_b": "mixed", "claim_id_a": 59, "claim_id_b": 75, "same": false }, { "field": "respects_robots_txt", "value_a": "n/a", "value_b": "yes", "claim_id_a": 55, "claim_id_b": 71, "same": false }, { "field": "robots_token_differs_from_ua", "value_a": "yes", "value_b": null, "claim_id_a": 62, "claim_id_b": null, "same": false }, { "field": "robots_txt_token", "value_a": null, "value_b": "GoogleOther", "claim_id_a": null, "claim_id_b": 77, "same": false }, { "field": "separate_search_and_training_tokens", "value_a": "yes", "value_b": "not_documented", "claim_id_a": 60, "claim_id_b": 76, "same": false }, { "field": "verifiable_by_rdns", "value_a": "n/a", "value_b": "yes", "claim_id_a": 58, "claim_id_b": 74, "same": false }, { "field": "what_it_controls", "value_a": "Gemini model training and grounding, not Search inclusion", "value_b": null, "claim_id_a": 61, "claim_id_b": null, "same": false } ], "differences": [ { "field": "honours_crawl_delay", "statement_a": "Google does not publish any Crawl-delay behaviour for the Google-Extended token.", "statement_b": "Google does not support the robots.txt Crawl-delay directive for GoogleOther.", "claim_id_a": 56, "claim_id_b": 72 }, { "field": "observed_fetches_robots_txt", "statement_a": null, "statement_b": "GoogleOther made 93 requests to Rattlesnakes By Mail between 2026-09-13T20:00Z and 2026-09-15T09:00Z and fetched /robots.txt on none of those requests. GoogleOther's first request to Rattlesnakes By Mail was the home page at 2026-09-14T12:03:30Z.", "claim_id_a": null, "claim_id_b": 147 }, { "field": "observed_requested_mcp_endpoint", "statement_a": null, "statement_b": "GoogleOther requested the /mcp endpoint of Rattlesnakes By Mail twice between 2026-09-13T20:00Z and 2026-09-15T09:00Z, at 2026-09-14T15:07:30Z and at 2026-09-14T18:27:49Z. Rattlesnakes By Mail returned status 405 to both GoogleOther requests for /mcp.", "claim_id_a": null, "claim_id_b": 146 }, { "field": "publishes_ip_list", "statement_a": "Google publishes no IP list for Google-Extended because Google-Extended has no separate HTTP request user agent string.", "statement_b": "Google publishes the IP address ranges used by GoogleOther at https://developers.google.com/static/crawling/ipranges/common-crawlers.json.", "claim_id_a": 57, "claim_id_b": 73 }, { "field": "purpose_documented", "statement_a": "Google-Extended is a standalone product token that controls whether Google uses crawled content to train Gemini models.", "statement_b": "GoogleOther is a generic crawler that Google product teams use to fetch publicly accessible content from sites.", "claim_id_a": 59, "claim_id_b": 75 }, { "field": "respects_robots_txt", "statement_a": "Google-Extended is a robots.txt token that publishers set to control use of crawled content for Gemini training.", "statement_b": "GoogleOther obeys robots.txt rules when crawling automatically.", "claim_id_a": 55, "claim_id_b": 71 }, { "field": "robots_token_differs_from_ua", "statement_a": "Google-Extended is a robots.txt control token and does not correspond to a crawler user agent string.", "statement_b": null, "claim_id_a": 62, "claim_id_b": null }, { "field": "robots_txt_token", "statement_a": null, "statement_b": "The robots.txt token for GoogleOther is GoogleOther.", "claim_id_a": null, "claim_id_b": 77 }, { "field": "separate_search_and_training_tokens", "statement_a": "Google-Extended controls Gemini training use only and does not affect inclusion in Google Search.", "statement_b": "Google does not document whether content fetched by GoogleOther is used for Gemini training.", "claim_id_a": 60, "claim_id_b": 76 }, { "field": "verifiable_by_rdns", "statement_a": "Google does not publish a reverse-DNS verification method for Google-Extended.", "statement_b": "GoogleOther requests are verifiable by reverse DNS lookup resolving to googlebot.com, google.com, or googleusercontent.com.", "claim_id_a": 58, "claim_id_b": 74 }, { "field": "what_it_controls", "statement_a": "Google-Extended controls AI training and grounding in Google systems and does not control Google Search inclusion.", "statement_b": null, "claim_id_a": 61, "claim_id_b": null } ], "sources": [ "https://developers.google.com/crawling/docs/crawlers-fetchers/verifying-googlebot", "https://developers.google.com/search/blog/2019/07/a-note-on-unsupported-rules-in-robotstxt", "https://developers.google.com/search/docs/appearance/ai-features", "https://developers.google.com/search/docs/crawling-indexing/google-common-crawlers", "https://developers.google.com/static/crawling/ipranges/common-crawlers.json", "https://rattlesnakesbymail.com/observed/googleother" ] }