# Markdown for LLMs

Category: [AI Search & GEO](https://seo-geo-glossary.com/en/glossary/category/ai-search-geo/) › [Controls & opt-out](https://seo-geo-glossary.com/en/glossary/category/ai-search-geo/controls-opt-out/) · Also known as: .md

A **Markdown version for LLMs** is a second, leaner version of a page in Markdown that AI agents and language models can request instead of the HTML. It carries the content without navigation, scripts and layout.

## How is it served?

There are two common ways. A site can publish a separate URL per page, often ending in `.md`. Or the server uses content negotiation. The agent sends `Accept: text/markdown` and the server answers with Markdown instead of HTML. Cloudflare announced a beta of this on February 12, 2026 for Pro, Business and Enterprise plans. In its own post, the HTML version used 16,180 tokens and the Markdown version 3,150, which Cloudflare calls an 80 percent reduction.

Claude Code's WebFetch tool is one client that uses content negotiation. Anthropic documents that it sends an `Accept` header preferring Markdown over HTML and a user agent beginning with `Claude-User`.

## What does Google say?

Google writes that you don't need to create new machine readable files, AI text files, markup, or Markdown to appear in Google Search, and that Google Search ignores them. A Markdown version may still be useful for other services.

## Example

```
GET /pricing/ HTTP/1.1
Accept: text/markdown
```

If the server supports it, it returns the page as Markdown. Otherwise it returns HTML.

## Related terms

- [llms.txt](https://seo-geo-glossary.com/en/glossary/llms-txt/index.md)
- [llms-full.txt](https://seo-geo-glossary.com/en/glossary/llms-full-txt/index.md)
- [LLM web search](https://seo-geo-glossary.com/en/glossary/llm-web-search/index.md)

## More on the searchVIU blog

- [What the Claude Code leak reveals about AI grounding — and what it means for your GEO strategy](https://www.searchviu.com/en/claude-leak-ai-grounding/)

## Sources

- [Optimizing your website for generative AI features on Google Search – Google Search Central](https://developers.google.com/search/docs/fundamentals/ai-optimization-guide)
- [Introducing Markdown for Agents – Cloudflare Blog (12.02.2026)](https://blog.cloudflare.com/markdown-for-agents/)
- [What the Claude Code leak reveals about AI grounding — and what it means for your GEO strategy – searchVIU blog (2026)](https://www.searchviu.com/en/claude-leak-ai-grounding/)
- [Tools reference – Claude Code Docs (Anthropic)](https://code.claude.com/docs/en/tools-reference)

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Last updated: October 7, 2026
URL: https://seo-geo-glossary.com/en/glossary/markdown-for-llms/