402sentinel Mcp

A risk gatekeeper for x402 payments that scores counterparties before your agent sends money. It exposes seven tools: assess_counterparty and assess_counterparty_deep return 0–100 risk scores based on on-chain settlement behavior on Base, recommend_policy generates wallet spending caps and denylists, and report_outcome feeds a delivery feedback loop. The firewall tools catch fraudulent routing, prompt injection payments, and drain attempts by comparing against your agent's payment history. Calls cost $0.002 to $0.02 paid via Circle Gateway in USDC. Reach for this when building autonomous agents that need programmatic spend controls tied to counterparty reputation, not just static allowlists.