OpenAI
ChatGPT-User
User-triggered agent that fetches webpages in real time when ChatGPT needs to retrieve information for a user query.
Purpose: Real-time webpage fetching for user queries
📊 Popularity & Traffic
User-initiated fetches; may ignore robots.txt rules since they're responding to direct user requests.
🤖 User Agent Strings
Use these patterns to identify ChatGPT-User in your server logs or configure your robots.txt file.
ChatGPT-User
May ignore robots.txtFetches pages on-demand during ChatGPT conversations
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot🌐 IP Ranges
Source: Official JSON file
Official source fileIdentified IP Ranges28 Ranges
23.98.179.16/28Subnet with 16 addresses
172.183.222.128/28Subnet with 16 addresses
52.190.190.16/28Subnet with 16 addresses
51.8.155.64/28Subnet with 16 addresses
51.8.155.48/28Subnet with 16 addresses
135.237.131.208/28Subnet with 16 addresses
How to read CIDR notation:
The/28 suffix indicates a block of 16 IP addresses. For example,.112/28 covers all addresses from .112 up to .127. Adding these to your firewall will block the entire range used by ChatGPT-User.📝 Robots.txt Configuration
Add the following to your robots.txt file to block ChatGPT-User:
User-agent: ChatGPT-User
Disallow: /💡 Important Notes
- Used when a ChatGPT user's query requires browsing a specific webpage
- Because fetches are user-initiated, may ignore robots.txt
- Similar behavior to Custom GPTs that browse the web
Beyond blocking crawlers
See what AI is saying about your brand
Understanding crawlers is step one. With Aiso, you can see the actual conversations happening about your brand inside ChatGPT, Claude, and Perplexity.