Rattlesnakes By Mail

ChatGPT-User vs GoogleOther

ChatGPT-User and GoogleOther compared on 12 documented fields, from 18 claims, last verified 2026-09-15.

Field	ChatGPT-User	GoogleOther	Comparison
cites_sources	not_documented	not documented	different
honours_crawl_delay	not_documented	no	different
observed_fetches_robots_txt	not documented	no	different
observed_requested_mcp_endpoint	not documented	yes	different
publishes_ip_list	yes	yes	same
purpose_documented	user_fetch	mixed	different
reads_llms_txt	not_documented	not documented	different
respects_robots_txt	partial	yes	different
robots_txt_token	not documented	GoogleOther	different
separate_search_and_training_tokens	not_documented	not_documented	same
user_agent_string_full	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot	not documented	different
verifiable_by_rdns	not_documented	yes	different

Differences

Field	ChatGPT-User statement	GoogleOther statement
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.	Google does not support the robots.txt Crawl-delay directive for GoogleOther.
observed_fetches_robots_txt	not documented	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.
observed_requested_mcp_endpoint	not documented	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.
purpose_documented	ChatGPT-User visits web pages for user actions in ChatGPT and in Custom GPTs.	GoogleOther is a generic crawler that Google product teams use to fetch publicly accessible content from sites.
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.	GoogleOther obeys robots.txt rules when crawling automatically.
robots_txt_token	not documented	The robots.txt token for GoogleOther is GoogleOther.
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.	not documented
verifiable_by_rdns	OpenAI does not publish a reverse-DNS verification method for ChatGPT-User.	GoogleOther requests are verifiable by reverse DNS lookup resolving to googlebot.com, google.com, or googleusercontent.com.

Sources