Safe Official docs AI & LLM Bots

ChatGPT Agent (Cloud browser)

Operated by OpenAI

Quick Facts

User-Agent:
ChatGPT Agent
Category:
AI & LLM Bots
Operator:
OpenAI
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10
Official docs:
help.openai.com

What "ChatGPT Agent" actually is

This is not a robots.txt token. It is the name that bot-management vendors give to the ChatGPT Work Cloud browser, the agent that visits a site when a ChatGPT user asks it to complete a task. OpenAI's help centre confirms the names: Akamai, HUMAN and Vercel call it ChatGPT Agent; Cloudflare labels the same traffic ChatGPT Operator (bot tag chatgpt-agent, detection ID 129220581).

The traffic identifies itself with Web Bot Auth (RFC 9421 HTTP Message Signatures): every request carries Signature, Signature-Input and Signature-Agent: "https://chatgpt.com" headers, and the public keys sit at chatgpt.com/.well-known/http-message-signatures-directory. That is how a CDN proves the request came from OpenAI. The user-agent string is an ordinary Chrome string; the robots.txt token that governs on-demand ChatGPT fetches remains ChatGPT-User.

Practical meaning: a User-agent: ChatGPT Agent line in robots.txt matches nothing. To allow or block this agent, use your CDN's bot rule for the name above, or verify the signature yourself. The OpenAI allowlisting guide gives the exact steps for Akamai, Cloudflare, HUMAN and Vercel.

What is ChatGPT Agent (Cloud browser)?

ChatGPT Agent (Cloud browser) is an on-demand AI fetcher operated by OpenAI. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into OpenAI's assistant.

ChatGPT Agent (Cloud browser) is an on-demand AI fetcher operated by OpenAI. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into OpenAI's assistant.
ChatGPT Agent (Cloud browser) uses the user-agent token ChatGPT Agent. You can control it via robots.txt, meta tags (noai), or the emerging llms.txt standard. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.

What happens if you block ChatGPT Agent (Cloud browser)?

✅ No SEO Impact - Blocking ChatGPT Agent (Cloud browser) does not affect your rankings in Google, Bing, or any other search engine. ChatGPT Agent (Cloud browser) is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.
Generally safe to allow; provides legitimate crawling value.

Want to see whether ChatGPT Agent (Cloud browser) actually visits you? Read how do I monitor AI bot traffic to my website?

How to block ChatGPT Agent (Cloud browser) with robots.txt

<code>User-agent: ChatGPT Agent</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)
User-agent: ChatGPT Agent Disallow: /
Allow all (robots.txt)
User-agent: ChatGPT Agent Allow: /
Block private only (robots.txt)
User-agent: ChatGPT Agent Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block ChatGPT Agent (Cloud browser) if ($http_user_agent ~* "ChatGPT Agent") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block ChatGPT Agent (Cloud browser) SetEnvIfNoCase User-Agent "ChatGPT Agent" bad_bot Order Allow,Deny Allow from all Deny from env=bad_bot
Meta robots tag
<meta name="robots" content="noindex, nofollow">
X-Robots-Tag header
X-Robots-Tag: noindex, nofollow

Is ChatGPT Agent (Cloud browser) safe to allow?

Yes, ChatGPT Agent (Cloud browser) is a safe and legitimate crawler operated by OpenAI. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Verify by reverse-DNS lookup: legitimate ChatGPT Agent (Cloud browser) requests resolve to OpenAI's domain.

What does ChatGPT Agent (Cloud browser) do?

Understanding ChatGPT Agent (Cloud browser)'s purpose helps you decide whether to allow or block it.

  • Fetches a page only when a user asks an AI assistant to read it
  • Summarizes or extracts the URL the user provided
  • Triggered by real user intent, not bulk crawling
  • Low traffic volume compared with training crawlers
  • Blocking it prevents users from pulling your content into the assistant

ChatGPT Agent (Cloud browser) in context

ChatGPT Agent (Cloud browser) is a user-triggered agent operated by OpenAI. In plain terms, it fetches a page when a person asks an assistant or app to open it. Our database files it under AI and LLM crawlers and ranks it Tier 1, the small set whose absence you would notice in AI answers or search results. 14 of the 104 AI and LLM crawlers in our database share this tier.

Its safety rating is safe and its blocking impact is low. So the decision about ChatGPT Agent (Cloud browser) rests on what you want from OpenAI, not on its behaviour. How we rate safety and impact.

How site owners treat ChatGPT Agent (Cloud browser)

Our robots.txt study of the Tranco top 10,000 did not track ChatGPT Agent as a named token, so we do not publish an adoption figure for it. If you run a large site, your own logs are the best evidence of how often it visits.

Does it follow robots.txt?

ChatGPT Agent (Cloud browser)'s operator does not clearly document how it treats robots.txt. Write the ChatGPT Agent (Cloud browser) rule anyway, then confirm in your logs that its requests stop.

OpenAI crawlers and close alternatives

ChatGPT Agent (Cloud browser) is one of 7 OpenAI crawlers in our database. A User-agent: ChatGPT Agent group controls ChatGPT Agent (Cloud browser) only; the other OpenAI tokens below need their own lines.

  • ChatGPT Agent: this crawler (Tier 1)
  • ChatGPT Operator: ChatGPT Operator (Cloudflare name), fetches a page when a person asks an assistant or app to open it (Tier 1)
  • ChatGPT-User: ChatGPT Search, fetches a page when a person asks an assistant or app to open it (Tier 1)
  • ChatGPT-User/2.0: ChatGPT Search v2, fetches a page when a person asks an assistant or app to open it (Tier 1)
  • GPTBot: ChatGPT Training, collects pages to train AI models (Tier 1)
  • OAI-AdsBot: OpenAI Ads Validator, checks pages for an SEO, uptime or analytics service (Tier 2)
  • OAI-SearchBot: OpenAI Search, fetches a page when a person asks an assistant or app to open it (Tier 1)

To give ChatGPT Agent (Cloud browser) the same answer as its siblings, stack User-agent: ChatGPT Agent with their lines above one set of rules; to treat ChatGPT Agent (Cloud browser) differently, give it its own group.

Other AI and LLM crawlers that do the same job (fetches a page when a person asks an assistant or app to open it) include Claude-SearchBot from Anthropic, Claude-User from Anthropic, GrokAgent from xAI, muse- from Meta, AI2Bot-DeepResearchEval from Allen Institute for AI, AmazonBuyForMe from Amazon. Deciding about ChatGPT Agent (Cloud browser) is usually a decision about the whole group, so check how your file treats these too.

We first recorded ChatGPT Agent on June 18, 2026. OpenAI documents it on help.openai.com, and we recheck that page before each release.

Which rule ChatGPT Agent (Cloud browser) actually follows

ChatGPT Agent (Cloud browser) reads exactly one group in robots.txt, the most specific one that names ChatGPT Agent, and never combines rules across groups. This short file shows the trap:

User-agent: *
Disallow: /private/

User-agent: ChatGPT Agent
Disallow: /drafts/
  1. Find the group. ChatGPT Agent (Cloud browser) looks for a group naming ChatGPT Agent. One exists, so it ignores User-agent: * completely.
  2. Apply only that group. It is refused /drafts/ and nothing else.
  3. The surprise. /private/ is open to ChatGPT Agent (Cloud browser), because that rule lives in the * group it no longer reads. To keep it out of both, repeat Disallow: /private/ inside its own group.
Test yourself: does a rule under User-agent: * apply to ChatGPT Agent (Cloud browser) if the file also has a User-agent: ChatGPT Agent group?

No. Once a group names it, ChatGPT Agent (Cloud browser) reads only that group. Put every rule you want it to follow inside its own group.

Related: writing content AI engines can cite

Test yourself: will blocking ChatGPT Agent (Cloud browser) remove your pages from AI answers?

Often, yes. ChatGPT Agent (Cloud browser) is a user-triggered agent, so pages it cannot fetch can drop out of the answers or results it supports.

Test yourself: is User-agent: chatgpt agent the same as User-agent: ChatGPT Agent?

Yes. RFC 9309 makes user-agent matching case-insensitive. Paths are a different story: Disallow: /Blog/ does not block /blog/.

Should you allow ChatGPT Agent (Cloud browser)? Decide by situation

Recommended setting for ChatGPT Agent (Cloud browser) by type of site
If you are...Recommended setting
You publish content and want AI answers to cite itAllow it. ChatGPT Agent (Cloud browser) fetches pages for answers, so blocking it can remove you from them.
You license content and want to stop AI trainingBlocking it does not stop training, because ChatGPT Agent (Cloud browser) is a user-triggered agent. Block the operator's training crawler instead.
You run an online shopAllow it on product and category pages, which are the pages shoppers ask assistants about.
Your server is under load from botsRate-limit before blocking. It is rated safe in our database.

Check ChatGPT Agent (Cloud browser) on your own site

  1. Open /robots.txt on your domain and search for ChatGPT Agent. If it is not named, it follows User-agent: *.
  2. List the Disallow lines in the group ChatGPT Agent (Cloud browser) follows and test your key URLs against them; the longest match wins, and Allow wins a tie.
  3. Look beyond the file. A firewall or bot manager can refuse ChatGPT Agent (Cloud browser) even when robots.txt allows it, and that never shows in the file.
  4. Run our live AI crawler test to see how ChatGPT Agent (Cloud browser) and every other crawler we track are treated in one pass, including firewall refusals.

Common mistakes with ChatGPT Agent (Cloud browser)

The errors we see most often with ChatGPT Agent (Cloud browser) in the files and firewalls we test:

  1. Assuming a robots.txt rule will stop ChatGPT Agent (Cloud browser). User-triggered fetches act for a person, and some operators say robots.txt may not apply to them. Check the operator's statement above.
  2. Blocking ChatGPT Agent (Cloud browser) as if it were a bulk crawler. It fetches one page because a person asked; blocking it means that person's assistant cannot read your page.
  3. Counting ChatGPT Agent (Cloud browser) visits as crawl volume. Each request maps to a real user question, which makes the paths it requests a useful signal of what people ask about you.

All three hide inside a file that looks correct, so check ChatGPT Agent (Cloud browser) from outside after every change.

Spotting ChatGPT Agent (Cloud browser) in your logs

robots.txt says what ChatGPT Agent (Cloud browser) may do; your access logs show what it actually did.

Count requests

On a server with standard Nginx or Apache logs, this counts matching requests per day (adjust the log path for your host):

grep -iE "ChatGPT Agent" /var/log/nginx/access.log \
  | awk '{print $4}' | cut -d: -f1 | sort | uniq -c

And this shows which paths it requested most, which is the quickest way to see whether your Disallow lines are being respected:

grep -iE "ChatGPT Agent" /var/log/nginx/access.log \
  | awk '{print $7}' | sort | uniq -c | sort -rn | head -20

Check the requests are genuine

Anyone can send the ChatGPT Agent (Cloud browser) user-agent, so confirm the source before acting on a match:

  • ChatGPT Agent: we hold no published IP list, so use reverse DNS where the operator documents a hostname and treat an unverifiable ChatGPT Agent (Cloud browser) request with caution.

Frequently Asked Questions

What is the official user-agent string for ChatGPT Agent (Cloud browser)?
The official user-agent string for ChatGPT Agent (Cloud browser) is: ChatGPT Agent. Use this exact string in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. Matching in robots.txt is case-insensitive. Verify a request genuinely comes from ChatGPT Agent (Cloud browser) by performing a reverse-DNS lookup on the source IP.
Is ChatGPT Agent (Cloud browser) safe?
Yes, ChatGPT Agent (Cloud browser) is a safe and legitimate crawler operated by OpenAI. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Will blocking ChatGPT Agent (Cloud browser) hurt my SEO?
✅ No SEO Impact - Blocking ChatGPT Agent (Cloud browser) does not affect your rankings in Google, Bing, or any other search engine. ChatGPT Agent (Cloud browser) is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.
How do I block ChatGPT Agent (Cloud browser) in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: ChatGPT Agent
Disallow: /

This instructs ChatGPT Agent (Cloud browser) not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does ChatGPT Agent (Cloud browser) respect robots.txt?
ChatGPT Agent (Cloud browser) is operated by OpenAI and is expected to fetch and parse /robots.txt before crawling, following RFC 9309. For hard enforcement, combine robots.txt with server-level IP or user-agent blocking.
How do I verify if ChatGPT Agent (Cloud browser) is crawling my site?
Search your web server access logs for the string ChatGPT Agent (case-insensitive: grep -i "ChatGPT Agent" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

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