The AIO Score
Agent Input Optimization. A single number that tells you how well AI agents can read, understand, and accurately represent your website.
What your score means
Your site is highly optimized for AI consumption. Clean semantics, low bloat, strong metadata.
Some AI readability, but significant noise. Framework bloat or missing structured data.
Heavy React Tax, no semantic structure. AI agents will hallucinate or skip your content entirely.
Three pillars of AI readability
React Tax
How much of your HTML is noise?
Measures the ratio of useless bytes (CSS classes, JS bundles, layout divs, SVGs, tracking scripts) to actual semantic text content. A 95% React Tax means only 5% of your page is meaningful to an AI agent.
Semantic Richness
Does your HTML tell a structured story?
Evaluates the presence and quality of semantic HTML elements: heading hierarchy (H1-H6), lists, tables, JSON-LD structured data, <main>/<article> landmarks, and Open Graph metadata.
Content Negotiation
Does your server speak Markdown?
Tests whether your server responds differently to Accept: text/markdown or known AI User-Agents. Sites that already serve Markdown to agents get full marks. This is the frontier most sites haven't reached yet.