{"protocol":"mcp","service":"agent-payment-error-corpus","tools":[{"name":"agent_payments_diagnose_error","description":"Diagnose likely root cause/remediation for x402/AP2/ACP/MPP/MCP/TAP payment failures.","price":"$0.10","annotations":{"x402_price":"$0.10"}},{"name":"agent_payments_error_families","description":"List known agent-payment error families with protocol, severity, remediation, and source evidence.","price":"$0.05","annotations":{"x402_price":"$0.05"}}]}