Stripe's AI payments protocol signals machine-to-machine commerce.

On March 18 Stripe and Tempo launched the Machine Payments Protocol (MPP), an open standard that lets AI agents pay for services autonomously; Visa, OpenAI, Anthropic, Mastercard, and Shopify integrated before launch and several businesses are already live on the protocol.

Stripe and Tempo launched the Machine Payments Protocol (MPP) on March 18 as an open standard designed to let AI agents pay for services autonomously. The article reports that Visa extended the protocol to support card payments, Lightspark added Bitcoin via the Lightning Network, and Stripe integrated cards, wallets, and buy-now-pay-later options. Several firms, including Visa, OpenAI, Anthropic, Mastercard, and Shopify, integrated before launch, and real businesses such as Browserbase, PostalForm, and Prospect Butcher Co. are using the protocol. Stripe describes MPP as introducing a session mechanism comparable to OAuth that lets agents pre-authorize and pre-fund payments so transactions settle in real time and appear in merchant dashboards. Key facts: - MPP launched March 18 and currently runs on Tempo’s mainnet, a payments-focused blockchain co-developed by Stripe and Paradigm. - The protocol uses a session model: an agent authorizes once, pre-funds an account, and subsequent requests trigger instant settlement without separate on-chain transactions per payment. - Visa extended MPP to card payments; Lightspark added Bitcoin Lightning support; Stripe supports cards, wallets, and buy-now-pay-later options. - The article reports integrations from Visa, OpenAI, Anthropic, Mastercard, and Shopify ahead of launch, and live use cases include Browserbase (per-browser-session billing), PostalForm (print-and-mail), and a local sandwich seller accepting agent orders. - MPP is described as rail-agnostic and payment-method agnostic, with support for stablecoins, card rails, and Bitcoin Lightning; Stripe places MPP alongside its earlier x402 work and an Agentic Commerce Suite. - The piece notes the effort is early and experimental, with firms and product teams forming around agentic payments. Summary: The article frames MPP as an infrastructure development that could shift billing toward per-use models and make payments a persistent layer for agent interactions. Major payment firms and platforms integrated at launch, but reported usage is still experimental and adoption timing and scale remain undetermined.