JSON-LD is for search engines. LLM-LD is for AI.
Make your website discoverable, understandable, and actionable by AI systems. One standard. One network. One file to start.
v1.0 100+ sites live Open Standard CC BY 4.0
The Problem
AI Can't Read Your Website
AI crawlers visit your site every day. They find HTML designed for humans — not machines. LLM-LD fixes that.
Without LLM-LD
AI crawlers guess.
They scrape your HTML, parse your nav menus, and try to figure out what your business does. They get it wrong. They miss your services, your locations, your differentiators. When someone asks an AI about your industry, you don't come up.
With LLM-LD
AI systems know.
Structured data tells them exactly what you do, who you serve, where you operate, and what actions to recommend. When someone asks an AI about your industry, it has everything it needs to recommend you — accurately and in context.
Architecture
Defense in Depth
Three independent layers. Each works on its own. Together, they're airtight.
Layer 3
llm-index.json
One file at a well-known path. Complete understanding of your business. The future — and it's already live on 100+ sites.
Layer 2
Knowledge Graph + Entities
Structured relationship files — people, products, services, locations. Rich context that gives AI systems the connections between what you offer.
Layer 1
Schema.org on AI Subdomain
Standard markup on a dedicated AI subdomain. Works today. No platform adoption required. Your site is already more AI-readable than competitors.
Layer 1 works if nothing else does. Layer 2 adds depth if crawlers find it. Layer 3 is the future — and it's already live.
See It
One File. Everything AI Needs.
A minimal llm-index.json for a dental practice. This is all it takes.
/.well-known/llm-index.json
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{
"@context": [
"https://schema.org",
"https://llmld.org/v1"
],
"@type": "llmld:AIWebsite",
"llmld:summary": {
"one_liner": "Family dental practice in Springfield, IL",
"key_facts": [
"Accepting new patients",
"Open Saturdays",
"Most insurance accepted"
]
},
"llmld:actions": {
"primary": [{ "name": "Book Appointment", "url": "https://acmedental.com/book" }]
}
}
That's it. One file. See full examples →
Discovery
The Discovery Network
A standard without discovery is a document.
A standard with a network is infrastructure.
The LLM Disco Network is the open, free-to-join discovery layer for LLM-LD. When an AI crawler reaches any site in the network, it follows links to the directory and discovers every other site.
100+ sites
10+ agencies
Growing weekly
Implement the spec. Submit your site. You're in.
Built for what's coming.
AI search isn't replacing traditional search. It's adding a new channel. The businesses that structure their data for both will dominate both.
LLM-LD is how you show up when AI answers the question.