| anti_circumvention_stance | not documented | ClaudeBot respects anti-circumvention technologies and does not bypass CAPTCHAs on crawled sites. |
| cites_sources | OpenAI does not publish whether ChatGPT responses cite pages fetched by ChatGPT-User. | not documented |
| honours_crawl_delay | OpenAI does not publish whether ChatGPT-User honours the robots.txt Crawl-delay directive. | Anthropic supports the non-standard robots.txt Crawl-delay extension for ClaudeBot. |
| observed_fetches_json | not documented | ClaudeBot made 177 JSON requests to Rattlesnakes By Mail between 2026-09-13T20:00Z and 2026-09-15T09:00Z, covering the .json twin of 170 base paths. The .json URLs of Rattlesnakes By Mail appear in no entry of the 171 URL sitemap. |
| observed_fetches_markdown | not documented | ClaudeBot fetched the .md twin of 170 base paths on Rattlesnakes By Mail between 2026-09-13T20:00Z and 2026-09-15T09:00Z, 170 Markdown requests of 542 ClaudeBot requests in that window. The .md URLs of Rattlesnakes By Mail appear in no entry of the 171 URL sitemap. |
| observed_first_request_path | not documented | ClaudeBot's first request to Rattlesnakes By Mail between 2026-09-13T20:00Z and 2026-09-15T09:00Z was /sitemap.xml at 2026-09-14T19:53:45Z. ClaudeBot fetched /robots.txt on the second request to Rattlesnakes By Mail. |
| observed_format_pass_order | not documented | ClaudeBot fetched Rattlesnakes By Mail in three format passes between 2026-09-13T20:00Z and 2026-09-15T09:00Z, HTML from 2026-09-14T20:52Z to 2026-09-14T20:57Z, then JSON from 2026-09-14T21:37Z to 2026-09-14T21:56Z, then Markdown from 2026-09-14T21:37Z to 2026-09-14T21:57Z. The same order holds on 170 of 170 base paths that ClaudeBot fetched in all three formats on Rattlesnakes By Mail. |
| purpose_documented | ChatGPT-User visits web pages for user actions in ChatGPT and in Custom GPTs. | ClaudeBot collects web content for training Anthropic generative AI models. |
| reads_llms_txt | OpenAI does not publish whether ChatGPT-User reads llms.txt files. | not documented |
| respects_robots_txt | ChatGPT-User fetches pages in response to user actions in ChatGPT, and OpenAI states that robots.txt rules may not apply to ChatGPT-User fetches. | ClaudeBot honours industry standard robots.txt directives that signal do not crawl. |
| separate_search_and_training_tokens | OpenAI does not document ChatGPT-User as a search or training opt-out token. | Anthropic separates training and search controls into two robots.txt tokens: ClaudeBot for training and Claude-SearchBot for search. |
| user_agent_string_full | ChatGPT-User sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot. | Anthropic does not publish a full user agent string for ClaudeBot. |