Aller au contenu principal

AI-discoverable docs (llms.txt)

When ChatGPT, Claude, or Perplexity crawl the web for documentation context, they look for an llms.txt file at the root of your site. Docsio generates one for every site automatically — no setup, free on every plan.

What is llms.txt

A simple text file at https://yourdomain/llms.txt that lists your documentation in a format optimized for LLMs. It includes:

  • A short summary of your product
  • A categorized list of doc pages with their URLs
  • Direct markdown URLs for each page so the LLM can fetch clean content

It's the documentation equivalent of robots.txt — a standard the AI ecosystem is converging on for AI-friendliness.

Where yours lives

Every Docsio site automatically serves it at:

https://<your-domain>/llms.txt

For example: https://docsio.docs.docsio.co/llms.txt. Open that in a browser to see the format.

What's in it

Generated automatically from your docs at publish time. The format roughly:

# Acme Documentation

> Acme is a tool for X. These docs cover features, integrations, and API reference.

## Getting Started
- [Quickstart](https://docs.acme.com/docs/getting-started/quickstart): Get up and running in five minutes.
- [Installation](https://docs.acme.com/docs/getting-started/installation): How to install Acme on your platform.

## Features
- [Search](https://docs.acme.com/docs/features/search): Built-in full-text search...

LLMs reading this can navigate your docs with a clear map.

When it regenerates

Every time you publish. The summary at the top is generated from your project's name and description. The page list is built from your sidebar — same order, same structure.

Customizing it

You generally don't need to. If you want to override the summary or categorize pages differently, project settings → Publishing → llms.txt → Custom summary lets you replace the auto-generated description.

For more control, request the full custom-llms.txt feature from support — coming soon for Pro projects.

Why it matters

Two reasons:

  1. AI assistants get better at answering questions about your product. When a user asks ChatGPT about your product, having an llms.txt makes the difference between a vague answer and a citation-quality one.
  2. Search visibility on AI search engines. Perplexity, You.com, and the AI features inside Google and Bing increasingly rely on llms.txt. Sites with one rank better in AI search.

Free vs Pro

Same on both. llms.txt generation is core to every Docsio site.

  • Reader MCP — a more powerful way for AI tools to access your docs (Claude Code, Cursor, etc. natively support MCP).
  • Search — what visitors get from your built-in search.