Yes. It is the automatic first two pages of the paid audit, offered so you can see whether you need the rest.

How many pages does it read?

Ten: the homepage and up to nine more from your sitemap, fetched in parallel, so the whole check still takes about a minute, most of it spent waiting for ChatGPT to answer. A smaller site gets all the pages it has, and the result says how many were actually read. Other tools check one page and call it a site audit.

What is a good score?

Eighty and above: engines can read and quote the site. Under forty-five: they mostly cannot. Between the two, the gap usually closes in a day, starting with the fix the check named first.

Products / Free check: can AI see your site

Free tool

Free check: can AI see your site

AI visibility in one number: a score out of 100, five areas and the one fix that matters most. On screen, no signup. Whether ChatGPT, Perplexity, Copilot, Claude and Gemini can read, understand and cite your site.

In plain words

Type in your website address and in about a minute you see whether ChatGPT, Perplexity and Google's AI answers can read your site and quote it when someone asks a question you answer. You get a score out of 100, the one thing to fix first in plain words, and an honest list of everything else it found. Nothing to install, no account.

Who it is for

A business owner who wants to know why AI assistants recommend competitors and not them
A marketer who needs one number and three fixes to bring to the next meeting
A developer or agency checking a site before and after a change

What you actually do

Paste the address of any public website
Read the score and the three fixes
Send the fixes to whoever runs the site, or order the full audit

Free

No account. Public signals only. About a minute.

Check a site →

What you need before you start

What	Cost	Why
Nothing at all	Free	Paste a web address and read the score. No account, no card, no install, nothing to download.

What you get

A score out of 100 and a grade, plus five areas: add them up by hand and you get exactly this number
Which of the fourteen AI crawlers your site lets in and which it turns away
The first fix in full, on screen: what is there now, what to change, how to check
The rest of the fixes as a blurred list with an honest count: how many and in which area each one sits
Leave an email and that same fix arrives as a letter you can hand to whoever runs the site
A table of the sampled pages: words, answer-first paragraph, dates, schema

How it works

Enter a site. Any public address. The checker reads the homepage, robots.txt, llms.txt, the sitemap and ten pages.
Read the score. Five areas, weighted by what answer engines need first: access, a map, an entity, something to quote, dates.
Fix the first one. The fix that moves the score most is shown straight away in three lines: what is there now, what to change, how to check. Copy them and hand them over as they are.

What it is not for

Measuring citations or traffic that already happen: that is in your analytics
Sites behind a login, or sites that block the checker

This is the check run on 15 of our sites before and after the work, on 11 and 12 September 2026: the 13 content sites plus oper-stack.com and oper-stack.ru. The audit score did not move, because its GEO group grew from three checks to eight in the same period; the signals did. Both measurements are dated and every signal is one curl request away.

Why I share this

I sell property to international buyers. It is a niche where a single advertising lead costs more than most products on this page, and where the buyer reads for weeks before writing to anyone. For years the enquiries came from paid ads. Then I built content sites that answer the questions those buyers ask, and the enquiries started arriving on their own: from Google first, then, more and more, from ChatGPT and Perplexity, which quote the pages when someone asks.

The numbers are on the cases page, site by site: clicks from Google up 249 percent across thirteen sites in more than ten countries, the first 28 days of June against the 28 days to 25 September 2026, and a new site that went from 3 clicks in its first 28 days to 98. Every tool on this page is a piece of the pipeline behind those sites, stripped of my data and packaged so you can run it in your own niche: the method for finding what a market actually searches for, the page shapes that get quoted, and the checks that stop a bad page from going live.

I am not a software company. I am an operator who got tired of paying for every lead, and these are the tools I use every week. If they work for you the way they work for me, tell me; if they do not, the refund policy says exactly what comes back and when.

Maksim Shchegolev, founder of OperStack · the numbers behind this · refund policy

Frequently asked questions

Is it really free?: Yes. It is the automatic first two pages of the paid audit, offered so you can see whether you need the rest.
How many pages does it read?: Ten: the homepage and up to nine more from your sitemap, fetched in parallel, so the whole check still takes about a minute, most of it spent waiting for ChatGPT to answer. A smaller site gets all the pages it has, and the result says how many were actually read. Other tools check one page and call it a site audit.
What is a good score?: Eighty and above: engines can read and quote the site. Under forty-five: they mostly cannot. Between the two, the gap usually closes in a day, starting with the fix the check named first.

Other products

Sixteen gates: Free
AI visit counter: Free
Astro starter: Free
Claude Code plugin: Free
MCP server: Free
Invisible to ChatGPT: $25
Pain to SEO: $69
Site Kit: $79
Why nobody shows you, and what to put on the site so they do: $149

Work done for you, agreed in writing before payment: Fix · Foundation. See services on request.

What a finished report looks like: the sample report, a real paid audit, anonymised.