{"service":"AI Storefront Readiness Grader","description":"Agent-callable storefront audit: 20 weighted checks, 0-100 score, A-F grade, top 3 fixes.","price_per_call":{"amount":"$1.00","asset":"USDC","network":"eip155:8453"},"how_to_call":{"mcp":"POST /mcp  (streamable HTTP; tool: grade_storefront; x402 payment in-protocol)","http":"POST /grade with JSON {\"url\": \"https://store.com\"}  (unpaid -> HTTP 402 + x402 details)"},"breakeven":"~20 paid calls/month covers a $20/mo Muse subscription at $1.00/call."}