Agent Payment & Governance Security Platforms describe the stack and practices that let autonomous AI agents make and manage payments while meeting regulatory, audit, and risk-control requirements. As of 2026-05-15, increasing agent autonomy, on‑chain payment activity, and regulatory attention to automated financial flows make integrated governance—combining observability, credential management, billing controls and anti‑fraud—essential. Key components include secure payment interfaces (e.g., Fewsats for wallet and purchase operations), identity and access controls (Keycloak MCP for realm and user administration; Descope for audit-log search and user management), and multi‑factor authentication bridges (Authenticator App MCP for automated 2FA workflows). Preventing credential leakage and misuse requires secret scanning and incident workflows such as provided by GitGuardian. Network and policy enforcement (OPNSense MCP) and blockchain/payment-specific MCPs (Bsc-mcp for BNB/BEP‑20 interactions) extend controls into infrastructure and on‑chain settlements. Centralized registries and gateways such as MCPJungle and Archestra.AI give teams a single source of truth for MCP servers, orchestration, observability, cost monitoring, and policy enforcement. Together these tools support compliance needs (audit trails, retention, role‑based access, AML/KYC reconciliation), billing controls (spend limits, cost attribution, reconciled on‑chain/off‑chain records) and anti‑fraud measures (anomaly detection, rapid credential revocation, firewall and policy automation). Practical deployments prioritize least‑privilege interfaces, immutable transaction logs, real‑time observability, and automated incident response. The result is a layered, auditable platform enabling paying agents to operate with controlled autonomy while meeting enterprise security and regulatory expectations.