What ChatGPT-User does
ChatGPT-User is OpenAI's user-action agent. It requests a page when a ChatGPT user's prompt requires visiting it, for example when a user pastes a link, or when ChatGPT needs live page content to answer. OpenAI documents that it is not used to crawl the web automatically and is not used for model training.
Should I allow ChatGPT-User to crawl my site?
Each ChatGPT-User request is a live conversation where your page is the answer. Allowing it lets ChatGPT read and represent your content accurately at the moment of intent; blocking it means ChatGPT falls back to what other sources say about you.
How to control ChatGPT-User
Target ChatGPT-User in your robots.txt with the ChatGPT-User token. Rules apply per bot, so you can allow this one while blocking others, or the reverse.
Allow ChatGPT-User
User-agent: ChatGPT-User
Allow: /Block ChatGPT-User
User-agent: ChatGPT-User
Disallow: /OpenAI publishes the IP ranges ChatGPT-User calls from, so requests can be verified against the official list.
User-agent string
As published by OpenAI. Remember that user-agent strings can be spoofed, so verify suspicious traffic against the operator's published IP ranges.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/botChatGPT-User FAQ
What is ChatGPT-User?
ChatGPT-User is the agent OpenAI uses when a ChatGPT or Custom GPT user's question leads it to visit a web page, and when users interact with external applications via GPT Actions. It is not used for crawling the web in an automatic fashion, and it is not used to determine whether content may appear in Search.
How do I block ChatGPT-User?
Add a robots.txt group with "User-agent: ChatGPT-User" and "Disallow: /". OpenAI states that because these actions are initiated by a user, robots.txt rules may not apply. OpenAI publishes the bot's IP addresses at https://openai.com/chatgpt-user.json, which you can use to identify or restrict this traffic at the network level.
About AI Assistant Fetchers
Agents that fetch a page in real time because a user asked an AI assistant about it. They don't build an index; each visit maps to a live conversation.
Blocking these removes your pages from live AI answers at the exact moment a user is asking about you or your category.
