llms.txt is the simple markdown file that hands AI tools a clean summary of your site and the pages that matter — like robots.txt, but for ChatGPT, Perplexity and Claude. Fill the fields, copy the file, drop it at yoursite.com/llms.txt. Free, instant, in your browser.
Save as a plain-text file named llms.txt and serve it at your domain root: yoursite.com/llms.txt
llms.txt is one signal. See all of them.
AI engines weigh ~12 signals when deciding what to recommend. Run a free check to see your store's full AI-Visibility score — schema, answer-readiness, agent-commerce, and more.
Adoption is early and not every AI tool reads it today — but it's low-effort, it standardizes how you describe your site to models, and momentum is growing. It's cheap insurance for AI discoverability. See our DTC data.
Where exactly does it go?
At the root: https://yoursite.com/llms.txt, served as plain text. Add it as a static file (Shopify: a redirect/app or theme asset).