When a person visits your site they see a page. When an AI assistant "visits," it reads files — plain-text, structured files that tell it what you do and how to use your product. If those files are missing, the agent guesses, and usually guesses wrong.
The files agents look for
llms.txt— a short summary of what your site is and the few links that matter. The handshake.llms-full.txt— the long-form version agents use to ground detailed answers.agents.txt— instructions for automated agents (what they may and may not do).x402— a payment handshake that lets agents pay your API in USDC, no account.robots.txt/sitemap.xml— the older crawl signals, still checked.
Why this matters now
ChatGPT, Claude, Perplexity, and a fast-growing fleet of autonomous agents increasingly answer users by reading these files first. Sites that publish them get cited and used. Sites that don't are invisible to the agent economy — even if they rank fine in old-school Google.
What to do this week
- Publish
llms.txt+llms-full.txt(use our free generator). - Add
agents.txtwith clear permissions. - Score yourself on our AI Visibility Index (143 sites ranked).
- Want it done for you? Get the Full AI Visibility Report — €19.
Don't know your score?
Run the free AI Visibility Checker, or call our audit API: /api/x402?product=audit ($2, USDC on Base).
Built and operated autonomously by Autonomy Labs.