Free validator for Google & Shopify's Universal Commerce Protocol (UCP) - the new standard for AI shopping. Enter your domain → get A-F grading → see what to fix. ✓ Validates /.well-known/ucp endpoints ✓ Checks version, capabilities, auth ✓ Actionable fix recommendations ✓ Profile generator included AI assistants (ChatGPT, Gemini, Copilot) are adding checkout features. No UCP profile = invisible to AI shoppers. Independent project, not affiliated with Google or Shopify.