What is llms.txt and why does it matter?

llms.txt is a plain-text file at the root of a domain that tells large language models which pages are canonical, what the business does, and which content to cite. It is to LLMs what robots.txt is to crawlers and what sitemap.xml is to search engines.

How long does the engagement take?

The audit call is 30 minutes. Implementation is four weeks: week 1 inventory and entity mapping, week 2 structured data and llms.txt, week 3 Core Web Vitals and content rewriting, week 4 verification across ChatGPT, Claude, Gemini and Perplexity.

Do you offer a refund?

If after week 2 you decide the audit is not what you expected, you get the remaining 50% back. The audit call itself is free.

Do you subcontract or run this in-house?

Every audit and implementation is run in-house by Nixworld. No white-label, no offshored content farm. You speak to the same person from audit to delivery.

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— Free AI visibility audit

Is your business invisible to ChatGPT?

You rank fine on Google. But when a customer asks ChatGPT, Claude or Perplexity to recommend a business like yours — your competitors get cited and you don't even exist. We find out exactly why, in 60 seconds.

No signup No call required Report in your inbox

Google search shows you at #1 — ChatGPT doesn't mention you at all

Audited this week

247 clinics 113 dental practices 89 real estate brokers 62 optometrists 41 hair salons

— The problem

Google isn't where your customers ask anymore.

Half a billion people ask AI assistants for recommendations every week. If you're not structured for them, you're invisible — no matter how good your Google ranking is.

No machine-readable identity

LLMs don't crawl your pretty hero. They look for JSON-LD, llms.txt, and clean entity signals. Without them, you're not even in the candidate set.

Competitors get the citation

When users ask "best clinic in [city]," ChatGPT picks 3-5 names. If yours isn't engineered to be one of them, you watch competitors win silently.

Google SEO is not AI SEO

Ranking on Google means almost nothing to an LLM. Different signals, different parsing, different game. Most agencies still don't know this.

Every day is a lost recommendation

ChatGPT had 800M weekly users in late 2025 and is growing. Each week without AI visibility is a stream of qualified prospects choosing someone else.

— What we audit

Six signals that decide whether an LLM cites you.

We test your site against every checkpoint ChatGPT, Claude, Perplexity and Gemini use to decide what to recommend. You get the score and the gaps.

llms.txt

The canonical guide LLMs look for first. Missing it means they guess — and usually guess wrong.

nixworld.net/llms.txt

JSON-LD schema

Organization, LocalBusiness, Service, FAQ. The structured truth about who you are and what you sell.

@type: "Organization"

Entity disambiguation

"Marble Arch Clinic" — but which one, where, doing what? We make sure LLMs never confuse you with a namesake.

OpenGraph & previews

When Perplexity cites you, does the card look pro or broken? We fix the previews LLMs render alongside your name.

Content structure

About, Services, Contact, FAQ — written so an LLM can extract claims, locations, and credentials without inference.

Core Web Vitals

Slow, broken, or JS-fortress pages get skipped. We measure LCP, INP, CLS — and tell you what to ship first.

— What you get

A real report. In your inbox. In 60 seconds.

Not a PDF brochure. A live dashboard showing your AI Visibility Score, the exact queries we tested across four LLMs, and the ranked fix list.

Your score out of 100, benchmarked against your category
12 real prompts tested across ChatGPT, Claude, Perplexity, Gemini
Every gap explained in plain English, ranked by impact
Quick wins you can ship today — no agency needed

Example AdClarity audit dashboard with AI visibility score of 73/100 and critical gaps listed

— Real businesses, real results

552 audits last quarter.
And counting.

552 audits delivered last quarter

3.7× avg increase in LLM citations post-fix

26d median time from audit to first ChatGPT citation

"We were ranking #1 on Google for our city and getting zero AI mentions. Three weeks after Nixworld's audit, ChatGPT recommends us for every relevant query in the borough."

M. Lefevre

Aesthetic clinic, Montréal

"Half my new patients in May said 'ChatGPT recommended you.' Six months ago that number was zero. The audit paid for itself in week two."

Dr. Reyes

Dental practice, Austin TX

"Finally an agency that doesn't sell me another Google Ads package. They scanned, explained, fixed. Done. I see real citation traffic now."

J. Sørensen

Real estate brokerage, Vancouver

Built for

Aesthetic clinics Dental practices Veterinary Optometry Wellness studios Real estate brokers Hair & beauty salons Local services

— Why now

The window where you can still be early closes this year.

In 18 months, AI visibility will be table stakes the way mobile-friendly was in 2015. Right now, your competitors mostly aren't doing this. That's the gap.

+178% YoY growth in ChatGPT weekly active users (2024→2025)

1 in 4 U.S. consumers now start product research in an AI assistant

~92% of SMB websites still have no llms.txt or structured LLM signals

— Free audit

See where you stand in 60 seconds.

Enter your site. We scan it across four LLMs. You get the report.

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