Stripe Launches Machine Payments Protocol — The Agent Economy Just Got Its Financial Plumbing

Stripe and Tempo co-authored MPP, an open internet-native protocol that lets AI agents pay for services without a human in the loop. The protocol covers microtransactions, recurring payments, and both stablecoin and fiat settlement via Shared Payment Tokens — all built on top of Stripe's existing PaymentIntents API. A few lines of code. That's it. Stripe Blog

This matters because agents have been stuck at the checkout page. Every autonomous workflow that needs to purchase compute, pay for a headless browser session, or subscribe to an API has required a human to authenticate, confirm, and often manually enter payment details. MPP eliminates that bottleneck with the same Stripe fraud detection, tax handling, and settlement infrastructure that already processes human payments.

Early adopters are already live: Browserbase charges per headless browser session, PostalForm lets agents print and mail physical letters, and Parallel Web Systems bills per API call — all agent-to-service, no human approval required. Fortune

The significance isn't the protocol itself — it's that Stripe built it. When the company processing hundreds of billions in annual transaction volume decides agents need their own payment rail, that's an infrastructure signal, not a feature announcement. MPP does for agent commerce what HTTP did for human web access: a stateless request/response protocol where an agent requests a resource, receives a payment challenge, authorizes, and gets the resource.

Visa simultaneously released its own MPP card spec and CLI tool, giving agents a native path into the $16T+ card payment network without developers storing API keys. PYMNTS The payments infrastructure layer for the agent economy went from nonexistent to production-grade in a single day.