llms.txt Directory

llms.txt is a standardized file that helps AI systems understand and cite your website. Similar to robots.txt for search engines, llms.txt provides structured information about your site for AI crawlers like GPTBot, ClaudeBot, and PerplexityBot.

The quality score (0-100) measures llms.txt implementation completeness. It evaluates: presence of descriptive title and summary, section headers for organization, navigation links to key pages, API documentation references, and contact information.

To add your site: 1) Create an llms.txt file at your domain root (example.com/llms.txt), 2) Use the free scan tool at citability.ai to verify your implementation, 3) Sites with valid llms.txt are automatically added to the directory.

ADP is a set of standards for making websites discoverable by AI systems. It includes llms.txt for content description, robots.txt rules for AI crawlers, Schema.org markup for structured data, and optional ai-discovery.json for advanced features.

Implementing llms.txt improves your AI visibility, meaning AI assistants like ChatGPT, Perplexity, and Claude are more likely to cite your content when users ask relevant questions. This drives qualified traffic and builds brand authority in the AI era.