---
title: "Vary: Accept: glossary: Agent Ready HTML"
description: "Vary: Accept defined: A response header telling caches that the body depends on the Accept header, so HTML and markdown are stored separately."
canonical: https://agentreadyhtml.com/glossary/vary-accept/
site: "Agent Ready HTML"
last_updated: 2026-11-04
section: "Glossary"
---

# Vary: Accept: glossary: Agent Ready HTML

> Vary: Accept defined: A response header telling caches that the body depends on the Accept header, so HTML and markdown are stored separately.

Source: https://agentreadyhtml.com/glossary/vary-accept/
Site: Agent Ready HTML
Last reviewed: 2026-11-04

# Vary: Accept

In short

A response header telling caches that the body depends on the Accept header, so HTML and markdown are stored separately. Example: Cloudflare Markdown for Agents adds Accept to Vary on converted responses. Related terms: Accept header, Content negotiation, Markdown negotiation, Markdown twin, x-markdown-tokens.

## Source of the example

The example in the summary above is from [developers.cloudflare.com](https://developers.cloudflare.com/fundamentals/reference/markdown-for-agents/), read 4 November 2026.

## Where it shows up on this site

-   [Guide: serve markdown on request](https://agentreadyhtml.com/guides/serve-markdown-on-request/)

## Neighbouring terms

-   [Accept header](https://agentreadyhtml.com/glossary/accept-header/): The request header that lists media types a client will take, with optional q weights.
-   [Content negotiation](https://agentreadyhtml.com/glossary/content-negotiation/): The HTTP mechanism where the client states preferred formats in the Accept header and the server picks a representation for the same URL.
-   [Markdown negotiation](https://agentreadyhtml.com/glossary/markdown-negotiation/): Content negotiation where Accept: text/markdown returns the page as markdown with Content-Type text/markdown.
-   [Markdown twin](https://agentreadyhtml.com/glossary/markdown-twin/): A markdown copy of a page at a predictable URL, such as page.md or page.html.md.
-   [x-markdown-tokens](https://agentreadyhtml.com/glossary/x-markdown-tokens/): A response header Cloudflare adds with the estimated token count of the markdown body.

## Sources

1.  [developers.cloudflare.com](https://developers.cloudflare.com/fundamentals/reference/markdown-for-agents/) https://developers.cloudflare.com/fundamentals/reference/markdown-for-agents/, read 4 November 2026

Last reviewed 4 November 2026

Edition

Crawl

2026-11-04

Page updated

2026-11-04

Method

How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).