ChatGPT-User is a bot in the AI assistants and agents category, operated by OpenAI.
ChatGPT-User is for user actions in ChatGPT and Custom GPTs. When users ask ChatGPT or a CustomGPT a question, it may visit a web page to help answer and include a link to the source in its response.
AI assistants fetch pages on demand when a user asks a chatbot or an agent to read, summarise or act on a URL. Each request is tied to a person, but the visit carries no ad impressions or analytics. Decide per agent whether the value is worth the load.
ChatGPT-User identifies itself with this user agent string:
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/botAnyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
We have not confirmed whether ChatGPT-User follows robots.txt. Add a rule, then check your logs to see that it stopped. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: ChatGPT-User Disallow: /
User-agent: ChatGPT-User Disallow: /private/ Disallow: /search
User-agent: ChatGPT-User Allow: /blog/ Disallow: /
User-agent: ChatGPT-User Allow: / User-agent: * Disallow: /
User-agent: ChatGPT-User group, ChatGPT-User ignores your User-agent: * rules, so repeat any that should still apply.ChatGPT-User from ChatGPT-User's user agent; check OpenAI's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
ChatGPT-User reads pages for a person who asked an AI about them. The visit carries no ad impressions, so exclude it from ad requests and decide whether it may read paywalled content.
Transfon Security for publishersAgent visits can click through landing pages and fill in forms. Exclude ChatGPT-User from conversions so campaign optimisation is based on people.
Transfon Security for advertisersAgents like ChatGPT-User can compare prices and may soon place orders. Decide whether agents may reach checkout, and verify them before they do.
Transfon Security for e-commerceChatGPT-User can sign up, log in and call endpoints on a user's behalf. Rate limit it on sign-up and API routes, where fake trials and abuse start.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows ChatGPT-User by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
ChatGPT-User is a bot in the AI assistants and agents category, operated by OpenAI. ChatGPT-User is for user actions in ChatGPT and Custom GPTs. When users ask ChatGPT or a CustomGPT a question, it may visit a web page to help answer and include a link to the source in its response.
We have not confirmed whether ChatGPT-User follows robots.txt. Add a robots.txt rule, then check your logs to see that it stopped, and block it by user agent if it did not.
Add "User-agent: ChatGPT-User" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "ChatGPT-User" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so ChatGPT-User may not follow it, and anyone can send ChatGPT-User's user agent, so a fake ChatGPT-User ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
AI assistants fetch pages on demand when a user asks a chatbot or an agent to read, summarise or act on a URL. Each request is tied to a person, but the visit carries no ad impressions or analytics. Decide per agent whether the value is worth the load.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
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