{"name":"Blackwall","description":"Pre-signature x402 payment guardrail: returns a GO / HOLD / STOP verdict before an agent signs a payment, from behavioral counterparty reputation and price-anomaly signals.","x402Version":1,"category":"payment-risk","tags":["x402","payments","risk","reputation","agent-guardrail","base","usdc"],"signals":["sanctions-ofac","counterparty-reputation","price-anomaly"],"screening":["sanctions-ofac"],"resources":[{"method":"POST","path":"/v1/forecast-payment","description":"Forecast a payment: GO / HOLD / STOP + signed receipt.","input":{"type":"object","required":["counterparty","amount","asset","chain"],"properties":{"counterparty":{"type":"string"},"amount":{"type":"string"},"asset":{"type":"string"},"chain":{"type":"string"},"payer":{"type":"string"},"resource":{"type":"string"}}},"outputVerdicts":["GO","HOLD","STOP"],"accepts":[{"scheme":"exact","network":"base","maxAmountRequired":"0.001","asset":"USDC","payTo":"0x3ec5e0ec1e1cb8e2afa36f3b40eed9057d9004e1"}]}],"mcp":{"transport":"stdio","tool":"forecast_payment"},"custody":false}