Specifications
LLM-LD is a family of specifications for AI-readable websites. Each spec is independent, open, and free to implement.
Published
These specs are live, implemented across 100+ sites, and ready for adoption.
LLM-LD 1.0
The primary standard. Defines llm-index.json — a single file at a well-known path that gives AI systems everything they need to understand a website. Covers conformance levels, required properties, verification, and the complete data model.
ADP 1.0 — AI Discovery Page
Defines the HTML discovery page that bridges the human web to the AI layer. The AI Discovery Page lives on a site's main domain and directs AI crawlers to structured data, the AI subdomain, and the LLM Disco Network. The page that makes the network work.
LLMs.txt 1.0 — Plain-Text AI Manifest
Defines the plain-text Markdown file that gives AI systems a concise orientation to a business website. Formalizes the llms.txt format already in widespread use across the SEO and GEO communities — with a predictable section structure, metadata header block, and defined vocabulary optimized for business discovery.
Planned
Future specifications currently in development. Shaped by real implementation experience across the network.
Entities 1.0
In DevelopmentStandard format for entity files — people, products, services, locations. Structured relationships that give AI systems the connections between what you offer and how it all fits together.
Feeds 1.0
In DevelopmentReal-time update feeds for AI crawlers. Notify AI systems when content changes without waiting for the next crawl cycle. Push instead of pull.
New to LLM-LD? Start with the Guide for a conceptual overview, or jump straight to the Quick Start to implement in 5 minutes. The specs are the formal reference — the guides are the explanation.