The ai. Web Standard
A proposal for serving AI-optimized web content via dedicated ai. subdomains, analogous to how www. became the convention for human-facing content.
Problem
AI agents consume web content but websites are designed for humans. This causes:
- Excessive token consumption from navigation, scripts, styles, and decorative markup
- Ambiguous structure due to CSS-driven layouts
- Missing semantics conveyed through visual hierarchy rather than machine-readable structure
- Inconsistent formats requiring per-site parsing logic
Solution
Serve parallel AI-optimized versions of web content under the ai. subdomain. AI pages contain the same factual information as human pages but use:
- Pure semantic HTML (no CSS, no JavaScript except JSON-LD)
- Structured data via Schema.org JSON-LD
- Tables and definition lists for structured information
- No navigation, footers, images, or marketing language
Implementation
DNS
Add a CNAME record for ai.yourdomain.com pointing to the same server.
Human Page Meta Tags (Required)
| Tag | Level | Purpose |
|---|---|---|
| <meta name="ai-content" content="[AI URL]"> | MUST | URL of the AI-optimized version |
| <meta name="ai-description" content="..."> | SHOULD | Description for AI agents about the AI version |
| <link rel="alternate" href="[AI URL]"> | SHOULD | Standard alternate link to AI version |
AI Page Meta Tags (Required)
| Tag | Level | Purpose |
|---|---|---|
| <meta name="ai-optimized" content="true"> | MUST | Identifies page as AI-optimized |
| <meta name="ai-standard-version" content="1.0"> | MUST | Spec version the page conforms to |
| <meta name="ai-format" content="structured-html"> | SHOULD | Content format (structured-html, markdown, or json) |
| <link rel="canonical" href="[human URL]"> | MUST | Points to human page (prevents SEO duplicate) |
Content Rules
AI Pages Must Include
- Valid HTML5 with DOCTYPE
- UTF-8 charset meta tag
- Single h1 element
- Semantic HTML (article, section, table, dl)
- Schema.org JSON-LD structured data
- All required meta tags from above
AI Pages Must Not Include
- External CSS stylesheets
- JavaScript (except JSON-LD)
- Images, videos, audio, or media
- Navigation menus, footers, sidebars
- Cookie banners, popups, tracking scripts
- Marketing language or emotional appeals
Token Efficiency Example
| Version | Size | Content |
|---|---|---|
| Human page (pricing) | ~15 KB | CSS, JS, nav, footer, animations, marketing copy |
| AI page (pricing) | ~200 bytes | Semantic HTML table with same factual data |
75x smaller. Same information.
Specification
Full formal specification: The ai. Subdomain Standard — Draft Specification v1.0