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Free AI SEO Tools

Check what AI assistants and their crawlers see when they reach your site. Each tool explains every result and how to fix it, and none of them asks for an email.

Checkers

llms.txt Validator FreeFetch or paste an llms.txt and check it against the llmstxt.org format: H1, summary, link sections, URLs and how it is served.AI Crawler Checker FreeSee which AI crawlers your robots.txt lets in: GPTBot, ClaudeBot, PerplexityBot, Google-Extended and 23 more, with the exact rule that decides each one.

Guides and reference

AI Agent Readiness by IndustryWhat an AI assistant needs to answer about a business like yours, for 94 industries: the questions customers ask and the facts to publish.Agent-Ready Reference SiteEvery machine-readable endpoint this site publishes, live and callable: MCP, A2A, NLWeb, llms.txt, agents.txt and Markdown negotiation.AI Agent Readiness ChecklistThe full checklist, in order of impact, for making a site readable and quotable by AI assistants.

For developers and agents

This site's own agent endpoints are public and free to call. Use them to see what a working implementation returns before you build your own.

NLWeb /ask EndpointA public natural-language query endpoint returning Schema.org JSON. Free, no key: a working example of NLWeb you can call.Public MCP ServerConnect any MCP client to https://built2winweb.com/mcp and see what a production website MCP server looks like. Free, no auth.

When you need more than a check

The free tools look at one file each. These are the paid products that audit or fix the whole site. They are ours, and listed here so you know where the free tools stop.

WebAgentScan from $9/monthThe full audit: scores any site out of 100 for AI agent readiness, MCP server quality and security, monitors it over time, with a JSON API.AI Indexing Pack $39 onceThe fix as drop-in PHP files: MCP server, llms.txt, agents.txt, Markdown negotiation, .well-known discovery and verified bot access control.AI Indexing Pack for WordPress $49 onceThe same surfaces as a WordPress plugin, generated from your own posts and pages. Nothing to edit.AIWebBuilding one-time priceAn AI website builder whose sites ship with llms.txt, Markdown pages, structured data and an optional MCP server already switched on.

Why these tools exist

Search used to have one gatekeeper. Now a question about your business might be answered by Google's AI Overviews, ChatGPT search, Perplexity, Claude or Copilot, and each of them reaches your site through its own crawler, under its own name, reading your robots.txt separately. Some read an llms.txt file if you publish one. Most site owners have never looked at what any of them see.

These checkers answer two narrow questions precisely: can the right AI crawlers get in? (AI Crawler Checker) and is your llms.txt usable when they do? (llms.txt Validator). For the wider picture, read the AI agent readiness checklist or browse what assistants need from 94 kinds of business.