Make your site work for AI agents

Three guides, built on the same eight checks the Index scores 1219 sites on every week — and on what we watch a real agent run into every week on the Field Test. Nothing invented, nothing you can't test with curl.

AI SEO Checklist: 8 Checks AI Agents Run on Your SiteAn AI readiness audit checklist you can run yourself in an hour: the eight checks that decide whether AI agents can read, understand and act on your site — llms.txt, crawler policy, readable HTML, structured data, sitemap, reachable pricing and support, MCP and OpenAPI — each with a 60-second curl test and the exact fix.llms.txt and OpenAPI: the AI Visibility Setup GuideHow to write an llms.txt that AI agents can actually use, publish OpenAPI and MCP so they can act, and serve the file correctly from FastAPI, Django, Express, Hono, Next.js, Laravel, Rails, Go, ASP.NET and more.AI SEO vs GEO vs AEO: What Actually MattersGenerative engine optimization, answer engine optimization, AI SEO and AI visibility are four names for mostly the same work. Here is what the labels mean, where they genuinely differ, and the eight things that decide whether an AI can use your site at all — measured across the most-visited sites on the web, audited every week.AI SEO: How to Get Your Site Read by AI AgentsTechnical SEO for AI discovery: search engines and AI agents want mostly the same things from your site — but agents fail in different places. Server rendering, bot walls, structured data, one-hop navigation, and how to measure your AI visibility with real agent transcripts.