Stripe Mpp

Validate MPP implementations against the specification — verify HTTP 402 challenge-response compliance, header formats, payment method correctness, service discovery, and production readiness. Use when auditing an MPP integration or preparing for production launch.

Cross-cutting MPP development patterns — security, replay protection, HMAC challenge binding, receipt validation, error handling, retry logic, TLS requirements, and monitoring. Use when designing architecture or solving production concerns.

Implement Shared Payment Token (SPT) lifecycle management for MPP — creation, usage, deactivation, webhook events, and reconciliation. Use when building the fiat/card payment flow within MPP using Stripe SPTs.

Implement MPP server-side middleware for Hono, Express, Next.js, and Elysia. Use when protecting API routes with HTTP 402 payment gates, configuring payment methods, or setting up the Mppx server instance.