llms.txt
Also known as: LLMs.txt standard, AI site summary file
llms.txt is a plain-text file at the root of a website that gives AI models a curated, machine-readable summary of what the site and the company are about.
Full Explanation
llms.txt is a plain-text file served at the root of a website (yourdomain.com/llms.txt) that gives AI models a curated, machine-readable summary of the site: who the company is, what it publishes, which pages matter, and where the key datasets and legal facts live. Where robots.txt tells crawlers what they may read, llms.txt tells AI systems what they should read and how to describe you. The format is markdown with a short site description followed by grouped link lists. It works because AI crawlers skip JavaScript and render nothing: a single flat text file is the cheapest reliable way to hand them your preferred narrative, your verified company profiles, and your research with DOIs. Rankfor publishes one for each of its domains and treats it as part of the brand identity layer, alongside Organization schema markup.
Example
open.rankfor.ai/llms.txt lists the company legal entities, verified profiles, free tools, datasets with DOIs, and key research findings in one file AI can read in a single request.
Research Insight
Our Where AI Gets Its Answers: 167,551 Citations research found: AI grounds brand answers in third-party sources 85.7% of the time
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