Agent Ready Crawlers

The field guide to every AI crawler and agent at the door, and the vendors who decide who gets in.

Browsing agent from OpenAI

ChatGPT Atlas (browser agent mode)

In short

ChatGPT Atlas (browser agent mode) is OpenAI's browsing agent. ChatGPT Atlas has no robots.txt token, so robots.txt cannot address it and the crawl cannot measure a block rate. The operator publishes nothing a site can check. ChatGPT Atlas has no operator bot documentation, checked 2026-11-04. Secondary source only (Verisoul Agent Atlas).

Operator
OpenAI Vendor profile: OpenAI
Purpose
Task agent All task agent rows. A browsing agent that clicks, fills forms and finishes a job for a person.
User-agent string
No exact string is published. What the operator or a third party says: Ran in the user's own browser with a Chrome user agent; no agent token published
robots.txt token
None. No robots.txt line can address this agent.
Respects robots.txt

No documentation

operator publishes no bot documentation (checked 2026-11-04) for Atlas agent mode; Verisoul reports OpenAI retired Atlas on 2026-08-09. Source, read 2026-11-04.

Operator publishes no bot documentation (checked 2026-11-04).

Verification

Nothing published

The operator publishes no list, reverse DNS pattern or key directory a site owner can check. Documentation, read 2026-11-04.

IP ranges
Not published.
Rate behaviour
Not published.
Block rate

None: the agent has no token, so a robots.txt block rate does not exist.

Documentation
Operator publishes no bot documentation (checked 2026-11-04). Closest page read.

Note. Secondary source only (Verisoul Agent Atlas). Kept as a row so log readers can place historic traffic; the signed Cloud browser row is the live OpenAI agent.

Allow and refuse lines

This agent has no robots.txt token, so there are no lines to copy. Without a token, a published list or a signature, a site owner cannot tell it from an ordinary visitor by request alone.

Refusing or allowing in robots.txt states a preference. For this row the operator or its documentation says robots.txt may not govern the fetch, so enforcement belongs in your WAF.

OpenAI in the Verification Ledger

One IP JSON per crawler plus a Web Bot Auth key directory for the Cloud browser. The most complete set read. All operators.

IP lists
Reverse DNS
publishes nothing
Key directory
https://chatgpt.com/.well-known/http-message-signatures-directory
Cloudflare
GPTBot and ChatGPT agent listed Verified on Radar (read 2026-11-04); ChatGPT agent is a Cloudflare signed agent, detection ID 129220581
Visa TAP registry
no public operator-level registration found (checked 2026-11-04)
Mastercard Agent Pay
no public operator-level registration found (checked 2026-11-04)

Other OpenAI rows

Sources

Last reviewed 2026-11-04