"author:HugoOu" matching MCP servers:

Enforces verifiable authorization, budgets, approvals, and audit trails between an agent and merchant/payment MCP servers, so that the legality of an entire transaction — not just a single call — is checked before money moves. Adds default-deny policy, two-phase budget reserve/commit, action-bound approvals, transaction guards against double-charging or unpaid fulfillment, result sanitization, and tamper-evident hash-chain evidence.