Markdown Negotiation Checker

Test whether a page serves Markdown to agents that ask for it with an Accept header.

Sends a request asking for text/markdown and compares what comes back with the site's normal HTML response. Serving Markdown to an agent that requests it saves it from parsing a page of layout markup, but it is an emerging convenience rather than a requirement — a site that only returns HTML is still perfectly readable.

This is one of the checks the AI Agent Readiness Checker scores under Content, and it can also be run on its own for any URL.