# Claim 85

OpenAI may add a robots.txt marker to the GPTBot user agent string when GPTBot fetches robots.txt files.

entity: GPTBot
field: robots_txt_fetch_marker
value: yes
statement: OpenAI may add a robots.txt marker to the GPTBot user agent string when GPTBot fetches robots.txt files.
evidence_url: https://developers.openai.com/api/docs/bots
evidence_quote: "When fetching robots.txt files, we may add a robots.txt marker to the user-agent string to help site owners distinguish those requests from requests for other resources"
method: vendor_doc
verified_at: 2026-09-13
confidence: high
status: current
supersedes: none

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