Rattlesnakes By Mail

Bingbot vs ClaudeBot

Bingbot and ClaudeBot compared on 16 documented fields, from 23 claims, last verified 2026-09-15.

Field	Bingbot	ClaudeBot	Comparison
anti_circumvention_stance	not documented	documented	different
cites_sources	yes	not documented	different
follows_noarchive	yes	not documented	different
honours_crawl_delay	yes	yes	same
observed_fetches_json	not documented	yes	different
observed_fetches_markdown	not documented	yes	different
observed_first_request_path	not documented	/sitemap.xml	different
observed_format_pass_order	not documented	html_json_md	different
opt_out_mechanism	yes	not documented	different
publishes_ip_list	yes	yes	same
purpose_documented	yes	training	different
reads_llms_txt	not_documented	not documented	different
respects_robots_txt	yes	yes	same
separate_search_and_training_tokens	no	yes	different
user_agent_string_full	Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)	not_documented	different
verifiable_by_rdns	yes	not_documented	different

Differences

Field	Bingbot statement	ClaudeBot statement
anti_circumvention_stance	not documented	ClaudeBot respects anti-circumvention technologies and does not bypass CAPTCHAs on crawled sites.
cites_sources	Copilot Search in Bing delivers clearly cited sources alongside generative answers to support publishers and content owners.	not documented
follows_noarchive	Bingbot excludes noarchive-tagged content from Copilot and Chat answers and from generative AI training data.	not documented
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.
opt_out_mechanism	Microsoft lets publishers block Bingbot content from Copilot answers and AI training using noarchive and nocache tags.	not documented
purpose_documented	Bingbot serves as Microsoft's standard crawler and handles most of Bing's daily web crawling.	ClaudeBot collects web content for training Anthropic generative AI models.
reads_llms_txt	Microsoft does not publish whether Bingbot reads llms.txt files.	not documented
separate_search_and_training_tokens	Microsoft controls Bingbot's use in AI training through meta tags rather than publishing a separate training-specific crawler token.	Anthropic separates training and search controls into two robots.txt tokens: ClaudeBot for training and Claude-SearchBot for search.
user_agent_string_full	Bingbot sends a user agent string containing bingbot/2.0 and a link to Microsoft's bingbot.htm page.	Anthropic does not publish a full user agent string for ClaudeBot.
verifiable_by_rdns	Microsoft verifies Bingbot traffic through reverse DNS lookups that resolve to hostnames ending in search.msn.com.	Anthropic does not publish a reverse-DNS verification method for ClaudeBot.

Sources