---
title: "What is llms.txt? - LeapScope"
url: https://leap-scope.com/glossary/llms-txt
description: "llms.txt is a plain-text markdown file at the root of a site that describes the site and lists its key pages for language models and agents."
---

# llms.txt

llms.txt is a plain-text markdown file at the root of a site that describes the site and lists its key pages for language models and agents.

Proposed in 2024, it has an H1 with the site name, a blockquote summary, and sections of links with one-line notes. It is cheap to publish and some crawlers and agents read it; the major engines have not committed to it publicly.

Treat it as a clear, machine-readable description of what you offer, kept consistent with the rest of the site, rather than as a ranking lever.

## Related terms

- [AI crawler](https://leap-scope.com/glossary/ai-crawler)
- [robots.txt for AI crawlers](https://leap-scope.com/glossary/robots-txt-ai-crawlers)
- [Entity](https://leap-scope.com/glossary/entity)

[All glossary terms](https://leap-scope.com/glossary)

## Measure llms.txt for your brand

LeapScope tracks the prompts your buyers ask on the AI engines every day and reports mentions, citations and share of voice against your competitors.