MPP Stripe Payment Method (Cards via SPTs)

Before writing code

Fetch live docs:

1. Fetch https://docs.stripe.com/agentic-commerce/concepts/shared-payment-tokens for the latest SPT API
2. Fetch https://docs.stripe.com/payments/machine/mpp for MPP + Stripe integration
3. Web-search site:docs.stripe.com shared_payment granted_token for SPT creation and usage API
4. Web-search mppx stripe payment method server configuration for mppx Stripe adapter setup

Conceptual Architecture

What Stripe Method Does in MPP

The Stripe payment method enables fiat/card payments within the MPP protocol. Instead of on-chain crypto transactions, the payment proof is a Shared Payment Token (SPT) — a one-time, merchant-scoped, amount-limited token that Stripe processes as a standard charge.

Flow: MPP + Stripe SPT