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Compatibility Standard

Name: Compatibility Standard - AI Visibility Score
Creator: Engagemii
Published: 2026-05-26T18:51:03.296Z
License: https://creativecommons.org/licenses/by/4.0/

Unclaimed

AEO Score: 4/10

Monitoring for AI engine activity

In the Engagemii AEO index

compat.spec.whatwg.org

What this score means

Your AEO score measures whether AI search engines (ChatGPT, Claude, Perplexity, Gemini) can actually read your site and cite it in answers. Two-thirds of websites are invisible to them. Compatibility Standard just got measured.

4/10 means Compatibility Standard is borderline visible. AI bots can crawl your site but your structured-data signals are thin. You are at risk of being skipped when buyers ask AI for a recommendation.

About Compatibility Standard

Participate: GitHub whatwg/compat (new issue, open issues) Chat on Matrix Commits: GitHub whatwg/compat/commits Snapshot as of this commit @compatstandard Tests: web-platform-tests compat/ (ongoing work) Translations (non-normative): 日本語简体中文 한국어 Abstract This standard describes a collection of web platform features that web browsers need to support for compatibility with the de facto web.