OpenAI

ChatGPT agent

Reported to send an ordinary Chrome User-Agent, so the signature is the identity. Vercel confirms ChatGPT's operator signs its requests with Web Bot Auth. OpenAI's bot page does not document it.

Class: Agent
robots.txt: Not stated
Evidence: Partly from third-party reports; Source

Proving it is real

Validate its Web Bot Auth signature. The signing identity is https://chatgpt.com.

Blocking it

This identity has no User-Agent token to match. It can only be recognised by its signature.

Last reviewed Nov 2, 2026