Payments-focused blockchain Tempo, developed by Stripe and Paradigm, announced the launch of its mainnet today, March 18. Also today, Stripe and Tempo revealed a new open standard for AI agent payments, Machine Payments Protocol (MPP), per a separate X post.
Today's mainnet launch opens public RPC endpoints to developers. The headline addition is the MPP, an open, rail-agnostic standard for autonomous agent-to-service payments. MPP introduces a "sessions" primitive that lets agents authorize a spending limit upfront and stream micropayments continuously without an on-chain transaction per interaction.
Stripe, Visa, and Lightspark have already extended MPP to support cards, wallets, and Bitcoin Lightning payments respectively. A payments directory launching alongside mainnet lists over 100 compatible services.
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