Knocklog

ChatGPT-User

OpenAI's assistant acting for a person.

Operator
OpenAI
Type
Assistant acting for a person
In the user agent
ChatGPT-User
robots.txt token
ChatGPT-User
Follows robots.txt
says it follows robots.txt only in part
Official documentation
developers.openai.com
Checked on
2026-11-04

What is ChatGPT-User?

ChatGPT-User is OpenAI's assistant acting for a person. It fetches a page because someone asked an AI assistant a question right now. Each visit is a person waiting for an answer that may mention you.

The operator's description: Visits pages when ChatGPT or Custom GPT users ask questions or use GPT Actions. (developers.openai.com)

How do I block or allow ChatGPT-User?

With robots.txt, using the token ChatGPT-User. OpenAI says it follows robots.txt only in part. To block the whole site:

User-agent: ChatGPT-User
Disallow: /

To allow it, use Allow instead of Disallow. Before blocking, weigh what it brings: every visit is a person asking an assistant for something; blocking takes you out of those answers.

How do I see whether ChatGPT-User visits my site?

In your server or CDN access logs, look for ChatGPT-User in the user agent. Google Analytics does not show these visits: agents do not run its JavaScript.

Anyone can copy the name in a user agent, so counting log lines is not enough. Knocklog reads your site's traffic on any host, confirms who is who, and shows how often ChatGPT-User came, which pages it read and what that brought you.

How do I know it is really ChatGPT-User?

OpenAI publishes ChatGPT-User's IP addresses at https://openai.com/chatgpt-user.json. A visit that claims to be ChatGPT-User from outside those ranges is spoofed.

Knocklog runs this check on every visit and separates the genuine agent from impostors.

Does ChatGPT-User visit your site?

See in seconds how your site treats AI agents. Then connect your traffic to learn who really came.

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