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AI agent
ChatGPT-User
OpenAIHonours robots.txt
Fetches a page on demand because a user or a ChatGPT action asked for that specific URL. Blocking breaks live browsing when a user pastes your URL into ChatGPT. Rarely worth blocking.
User-agent string
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot
How to verify it
OpenAI's chatgpt-user IP list, published alongside the other OpenAI agents.
What blocking costs
Blocking breaks live browsing when a user pastes your URL into ChatGPT. Rarely worth blocking.
robots.txt rule
# Block ChatGPT-User
User-agent: ChatGPT-User
Disallow: /
# Allow everything else
User-agent: *
Allow: /Robots.txt is enough
OpenAI documents ChatGPT-User as honouring robots.txt. Verify with your logs after deploying — a spoofed agent will keep coming.
Generate a full robots.txt
Pick which AI crawlers to allow or block across all 42 agents and copy the file out.
Open the generator →Other OpenAI agents