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📈 PrestaShop SEO Guides
📈 PrestaShop SEO Guides

The llms.txt file for PrestaShop: your AI identity card, generated by Fexa

The /llms.txt is the machine-readable summary of your store that ChatGPT, Perplexity and Gemini read. Here's how Fexa AI generates it from your catalogue and serves it automatically at your PrestaShop store's root.

Reading time : 8 min

When a shopper asks ChatGPT "where can I buy a niche perfume?", the AI doesn't crawl your store page by page like Google. It looks for a clean, factual summary of who you are. That summary is the /llms.txt file — and Fexa AI now generates and serves it for you.

What is an llms.txt file?

The /llms.txt is a text file placed at your site's root (yourstore.com/llms.txt) that gives AI models a machine-readable identity card: who you are, your main categories, your key pages. Think of it as the robots.txt or sitemap.xml equivalent, but aimed at AI answer engines rather than indexing crawlers. The standard is described at llmstxt.org.

It's written in Markdown: a heading (your store), a positioning sentence, then lists of links to your categories and important pages.

Why it's an AEO lever

AI engines have limited time and context to "understand" a site. A clear /llms.txt saves them from guessing: they instantly know what you sell and can cite you correctly. It's one of the levers of AEO (Answer Engine Optimization), and one of the points assessed by Google's new "Agentic Browsing" score in Lighthouse.

How Fexa AI generates your llms.txt

Fexa builds your /llms.txt from your real data — your catalogue (categories, CMS pages), your brand identity and your sitemap. No invented data: every line comes from your store.

The generated file contains:

  • a heading (your store name);
  • a positioning sentence drawn from your brand identity;
  • the product count and main language;
  • your main categories as Markdown links;
  • your information pages (terms, shipping, about…);
  • a pointer to your sitemap for the full catalogue.

💡 The more complete your brand identity, the better the positioning sentence. See the Initial configuration guide.

Managing it from Fexa (step by step)

  1. Open Settings → AI & Tone.
  2. Find the "AI readability — llms.txt" card.
  3. You'll see the exact preview of the file generated from your catalogue.
  4. Click "Regenerate" to rebuild it after updating your store.
  5. "Copy" button if you want to grab it manually.
  6. The "Generated on…" date shows the last update.

Good news: it's also regenerated automatically on every scan — nothing to maintain.

How it's served on your store

Generating the file isn't enough: it must be served at your store's root. That's the job of the Fexa AI Connector module: as soon as you click Regenerate (or after a scan), Fexa delivers the content to your store, and the module automatically exposes it at yourstore.com/llms.txt.

⚠️ This delivery requires a recent connector version. If the card shows "connector needs updating", download the latest version from the module page (pick the right one: PrestaShop 8/9 or 1.7).

Verify it works

Open https://yourstore.com/llms.txt in your browser. You should see your file's Markdown (heading, categories, links). If you get a 404, the file hasn't been delivered yet: click Regenerate in Fexa, then reload.

In summary

The /llms.txt is the identity card AI engines read to represent you. Fexa generates it from your real catalogue, regenerates it on every scan, and the connector serves it automatically at your store's root — without touching your theme. It's concrete AEO, ready in one click. Discover the module.

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