What exactly is llms.txt?

An AI-era robots.txt that tells AI models about your site's core content and policies. Located at /llms.txt or /llms-full.txt — increasingly important for AEO.

What are GPTBot and ClaudeBot?

Web crawlers from OpenAI (ChatGPT) and Anthropic (Claude). If your robots.txt blocks them, those AIs cannot cite your site.

My AEO score is low — how do I raise it?

Follow the per-item guide. Biggest wins: ① add llms.txt, ② allow AI crawlers, ③ add FAQPage and HowTo JSON-LD, ④ author and datePublished metadata. Nadoo's SEO/AEO product handles all of this automatically.

How do I use the results?

Take the current score as a baseline, fix items one by one, and re-test to see the score climb. Periodic monitoring is recommended.

Can I scan a whole site at once?

Currently per-page only. Site-wide automated monitoring is part of Nadoo's SEO/AEO product.

AEO Checker

Free AEO Checker

Name: Free AEO Checker — Test if AI Search Engines Will Cite Your Site
Availability: InStock
Author: Nadoo

Enter a URL and we'll score how well it surfaces in ChatGPT, Perplexity, and Google SGE — from llms.txt to AI crawler permissions.

AEO score in 60 seconds

Enter URL

Paste the page URL. We recommend a specific page, not the whole site.

Score + per-item diagnosis

A 0–100 AEO score with each check clearly marked by status.

Apply the improvement guide

Each item explains exactly what to fix — re-test after.

AI-search era essentials

From llms.txt to GPTBot rules
full AEO coverage

Catches what classic SEO tools miss — llms.txt, AI crawler permissions in robots.txt, JSON-LD richness, E-E-A-T signals — purpose-built for AI search.

Citability analysis

Is your content actually
citable by ChatGPT?

Checks for definitional sentences, short factual statements, tables, and definition lists — the patterns LLMs prefer when quoting sources.

Frequently asked questions

SEO optimizes for Google search rankings; AEO optimizes for citation by answer engines like ChatGPT, Perplexity, and Google SGE. They overlap, but AEO has unique items: llms.txt, AI crawler permissions, JSON-LD richness.

AEO 60. GPTBot blocked. No llms.txt.
ChatGPT will not cite you in this state.

Nadoo's SEO/AEO product applies all of these automatically — llms.txt auto-generated, multilingual JSON-LD inserted, AI crawlers allowed.

See SEO/AEO product All features

Feature	This free tool	Nadoo SEO/AEO
AEO score diagnosis	✓	✓ Continuous monitoring
Auto-generate llms.txt	—	✓
Auto JSON-LD insertion	—	✓ Per page type
Multilingual auto-apply	—	✓ 15 languages
Periodic monitoring	—	✓ With alerts