ChatGPT
- Web, business, image and find fan-out queries
- Sources fetched and sources cited, side by side
- Product cards with price, rating and merchant
Only Fan Out: see what the AI searched before it answered.
Only Fan Out is a free Chrome extension that shows every fan-out query, every source fetched, and every source cited behind answers in ChatGPT, Claude and Grok.
Free on the Chrome Web Store
Three engines
One side panel for ChatGPT, Claude and Grok.
Each engine sends its own search data back to your browser. Only Fan Out reads what is already there and lays it out per turn.
Claude
- Web and places searches, grouped by turn
- Citations attached to the answer text
- Places Claude used on the map, and places only named
Grok
- Web searches and page browses
- Inline citations resolved back to their sources
- X posts quoted or referenced in the answer
Guides
How AI assistants search and cite.
Plain guides to the searches ChatGPT, Claude and Grok run before they answer, the pages they cite, and how to use that data for GEO.
Start here
What is query fan-out?
How ChatGPT, Claude and Grok split one prompt into several searches, why fetched differs from cited, and how to see the queries yourself.
How ChatGPT, Claude and Grok search the web
How each assistant decides to search, writes its queries, reads pages and cites a few of them, with the crawlers that let it read your site.
AI citations: what ChatGPT, Claude and Grok read and cite
How each assistant shows its citations, how many of the pages it reads get cited, and what the studies say about which ones.
GEO with fan-out data: how to use fan-out queries, step by step
Record the searches ChatGPT, Claude and Grok run for your buyers' prompts, group them into themes, and fix what each turn shows.
Latest guides
Does ranking on Google get you cited by AI? What the studies say
How often AI answers cite pages that rank in Google's top ten, engine by engine, why the studies disagree, and which searches to track instead.
How ChatGPT uses site: searches in its fan-out
Six published counts of ChatGPT's site: searches, from 0.14% to 64%, why they disagree, and which sites it narrows its searches to.
ChatGPT's four kinds of fan-out query: web, business, image and find
What each kind of ChatGPT search line looks for, a real turn's mix of 17 queries, and which kinds your pages can come up for.
How to export ChatGPT search queries and sources to CSV
Which export routes still hold ChatGPT's queries, how to lay the file out in a sheet, the row counts to expect and the formulas to run.
Why ChatGPT read your page but did not cite it
Why ChatGPT leaves out most pages it fetches, how much of your answer fits in its snippet, and how to tell which reason applies to your page.
How it works
Three steps, no setup.
1
Install and open the side panel
Add the extension, then click its toolbar icon on any ChatGPT, Claude or Grok tab. There is no popup and no options page to configure first.
2
Ask anything
Send a message in ChatGPT, Claude or Grok the way you normally do. Only Fan Out watches the response your browser already receives.
3
Read the fan-out
See the queries the assistant generated, the sources it retrieved, and the sources it cited, with your brand and domains flagged when they appear.
Built for GEO
Made for people who audit AI answers.
SEO and GEO practitioners, researchers and anyone curious about what an assistant does before it responds. Our guide to using fan-out queries for GEO sets out the workflow step by step.
Fan-out queries in order
The exact search queries an assistant generated for a turn, in the order it ran them.
Fetched versus cited
Every page a search fetched, and which of those pages the final answer actually cited.
Watchlist for brands and domains
Track brands or domains you care about and see every mention highlighted across queries, sources and answers.
History across engines
Every captured conversation, searchable by title, prompt or query text, across ChatGPT, Claude and Grok.
CSV, Markdown and JSON export
Export a single turn or a whole conversation in the format you need for a report or a spreadsheet.
Diagnostics for schema drift
Parser status per engine, drift flags when an engine changes a field, and a log of recent captures.
Nothing leaves your browser.
No servers, no accounts
Only Fan Out has no servers of its own and asks you to sign into nothing. There are no tokens stored anywhere outside your browser.
Data lives in chrome.storage.local
Captured conversations, your watchlist and your settings stay on your device, in the extension's own local storage.
Grok connector searches
Searches Grok runs against connected Gmail, Drive or Calendar are counted, but their query text is never stored.
FAQ
Questions people ask.
Is it free?
Yes. Only Fan Out is free to install and use.
Does it work with Gemini?
Not yet. Only Fan Out currently supports ChatGPT, Claude and Grok.
Does it slow down ChatGPT?
No. Only Fan Out reads the network responses your browser already receives. It does not add its own requests to a normal turn.
Why is a source fetched but not cited?
An assistant's search step often retrieves more pages than the final answer references. Only Fan Out shows the full set the assistant fetched next to the smaller set it cited, so you can see the gap between the two. For what studies say about which pages get cited, read how AI citations work in ChatGPT, Claude and Grok.
Does OnlyFans have anything to do with this?
No. Only Fan Out (also written OnlyFanOut, at onlyfanout.com) is an independent Chrome extension for AI search data. The name is a play on "fan-out," the term for how an AI answer splits one question into many searches.
What is query fan-out?
Query fan-out is when an AI assistant splits one prompt into several search queries, runs each one, and answers from what it finds. See how query fan-out works for a breakdown by engine.
Which AI assistants does Only Fan Out support?
Only Fan Out supports ChatGPT, Claude and Grok. Gemini and Google AI Mode are not supported yet. To see how each supported assistant runs its searches, read how ChatGPT, Claude and Grok search the web.
What is the difference between a fetched source and a cited source?
A fetched source is a page a search step retrieved. A cited source is one of those pages the final answer actually references. The fetched set is usually larger than the cited set.
Can I track whether my brand or domain shows up?
Yes. Add a brand or domain to the watchlist and Only Fan Out highlights every mention across queries, fetched sources, cited sources and answers.
Can I export the data?
Yes. Export a single turn or a whole conversation as CSV, Markdown or JSON.
Do I need an account or an API key?
No. Only Fan Out runs entirely in your browser and asks for no account, login or API key. To see what it reads and where that data stays, read how Only Fan Out works.