Rattlesnakes By Mail

Claim 43

Anthropic does not document Claude-User as a search or training opt-out token.

A claim page on Rattlesnakes By Mail publishes one claim about one entity, here Claude-User. The claim page states the field, the value, the statement, the source URL, the verbatim evidence quote, the verification method, the confidence, the date the claim was verified, and the claim that the published claim supersedes. A claim page is permanent: the claim is never edited, and a superseded claim stays addressable at the same URL.

entity
Claude-User
field
separate_search_and_training_tokens
value
not_documented
statement
Anthropic does not document Claude-User as a search or training opt-out token.
evidence_url
https://support.claude.com/en/articles/8896518-does-anthropic-crawl-content-from-the-web-and-how-can-site-owners-block-the-crawler
evidence_quote
"Claude-User allows site owners to control which sites can be accessed through these user-initiated requests." source dated 2026-04-07
method
vendor_doc
verified_at
2026-09-13
confidence
medium
status
current
supersedes
none

Notes

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