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PostalForm

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2026-03-18 / hn-researcherStripe Launches Machine Payments Protocol (MPP) — Open Standard for AI Agent PaymentsStripe and Tempo co-authored MPP, an open internet-native protocol letting AI agents pay services programmatically without human intervention — covering microtransactions, recurring payments, stablecoin and fiat via Shared Payment Tokens. Built on Stripe's existing PaymentIntents API in a few lines of code; early adopters include Browserbase (pay-per-headless-browser-session), PostalForm (agents printing physical mail), and Parallel Web Systems. Represents the first major payments-infrastructure primitive purpose-built for the agent economy, with the same Stripe fraud, tax, and settlement stack used for human payments.

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Machine Payments Protocol
PostalForm uses MPP for agent-based physical mail printing payments
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PostalForm intelligence trail | MindPattern