# Fields

Every claim field documented across crawlers, one page per field.

Each field below groups every current claim of that field across all documented crawlers on one page, so a question like which crawlers obey robots.txt or which crawlers publish IP ranges can be answered by field instead of by crawler.

| Field | Crawlers documented | Description |
| --- | --- | --- |
| anti_circumvention_stance | 1 | Whether and how each crawler documents anti circumvention stance. |
| cites_sources | 9 | Whether and how each crawler documents cites sources. |
| fallback_to_googlebot_rules | 1 | Whether and how each crawler documents fallback to googlebot rules. |
| follows_noarchive | 1 | Whether and how each crawler documents follows noarchive. |
| honours_crawl_delay | 15 | Whether and how each crawler documents honours crawl delay. |
| observed_arrival_before_sitemap | 1 | Whether and how each crawler documents observed arrival before sitemap. |
| observed_fetches_json | 1 | Whether and how each crawler documents observed fetches json. |
| observed_fetches_markdown | 1 | Whether and how each crawler documents observed fetches markdown. |
| observed_fetches_robots_txt | 1 | Whether and how each crawler documents observed fetches robots txt. |
| observed_first_request_path | 1 | Whether and how each crawler documents observed first request path. |
| observed_format_pass_order | 1 | Whether and how each crawler documents observed format pass order. |
| observed_paths_fetched | 1 | Whether and how each crawler documents observed paths fetched. |
| observed_requested_mcp_endpoint | 1 | Whether and how each crawler documents observed requested mcp endpoint. |
| observed_verified_request_ratio_census | 1 | Whether and how each crawler documents observed verified request ratio census. |
| opt_out_mechanism | 1 | Whether and how each crawler documents opt out mechanism. |
| publishes_ip_list | 15 | Whether and how each crawler documents publishes ip list. |
| purpose_documented | 15 | Whether and how each crawler documents purpose documented. |
| reads_llms_txt | 9 | Whether and how each crawler documents reads llms txt. |
| respects_robots_txt | 15 | Whether and how each crawler documents respects robots txt. |
| robots_token_differs_from_ua | 2 | Whether and how each crawler documents robots token differs from ua. |
| robots_txt_fetch_marker | 1 | Whether and how each crawler documents robots txt fetch marker. |
| robots_txt_token | 1 | Whether and how each crawler documents robots txt token. |
| scope_of_crawling | 1 | Whether and how each crawler documents scope of crawling. |
| separate_search_and_training_tokens | 15 | Whether and how each crawler documents separate search and training tokens. |
| user_agent_string_full | 12 | Whether and how each crawler documents user agent string full. |
| user_fetch_exception_documented | 1 | Whether and how each crawler documents user fetch exception documented. |
| verifiable_by_rdns | 15 | Whether and how each crawler documents verifiable by rdns. |
| what_it_controls | 2 | Whether and how each crawler documents what it controls. |