Verified x402 API directory for autonomous agents: discover x402 pay-per-call endpoints with settlement proof, schema quality, examples, freshness, seller score, and registry coverage. Price 0.08 USDC on Base via x402. Free preview: https://x402-market-intel-mcp.mtree.workers.dev/preview/verified_endpoints?source=x402_manifest. Demo: https://x402-market-intel-mcp.mtree.workers.dev/demo/verified_endpoints. Contact: https://x402-market-intel-mcp.mtree.workers.dev/contact.