Seller-facing schema/example doctor: compares an x402 resource to top-earning examples and returns exact missing request/response examples, listing copy, schema patches, and a measurable polish gate. Price 0.08 USDC on Base via x402. Free preview: https://x402-market-intel-mcp.mtree.workers.dev/preview/api_example_doctor?source=x402_manifest. Demo: https://x402-market-intel-mcp.mtree.workers.dev/demo/api_example_doctor. Contact: https://x402-market-intel-mcp.mtree.workers.dev/contact.