Stripe, in collaboration with Tempo, the payments-focused Layer 1 blockchain it co-developed with Paradigm has announced the Machine Payments Protocol (MPP) as Tempo’s mainnet officially went live.
Tempo is a high-throughput, low-cost blockchain purpose-built for stablecoin payments and high-frequency transactions; think sub-second finality, predictable fees, and support for tens of thousands of TPS. It has no native gas token—instead, fees settle in major stablecoins. The mainnet opens public RPC endpoints for developers to build on, following a public testnet phase that included partners like Mastercard, Visa, UBS, and Klarna.
Machine Payments Protocol (MPP)
MPP is an open, rail-agnostic standard for autonomous “machine-to-machine” and AI agent payments. It enables AI agents or software and services to programmatically request, authorize, and settle payments without human intervention.
Key features include: A “sessions” primitive: Agents pre-authorize a spending limit, then stream continuous micropayments for API calls, data access, compute, or ongoing services without needing an on-chain tx per interaction—settlements can aggregate many small actions.
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Supports multiple rails: Starts with stablecoins on Tempo, but extends to fiat like cards via Stripe/Visa, Bitcoin Lightning via Lightspark, and more. It’s designed to be extensible beyond any single blockchain or payment system. As AI agents become more autonomous, they need seamless ways to pay for resources (data, tools, services) across the internet—MPP standardizes this to avoid fragmented billing systems.
Stripe’s blog post calls it “an open standard, internet-native way for agents to pay,” co-authored with Tempo. Developers can integrate MPP support using Stripe’s existing APIs like PaymentIntents in just a few lines of code for accepting such payments. This positions Tempo as a settlement layer for an emerging “AI-native” economy, bridging traditional fintech with crypto, stablecoins and agentic AI use cases.
It’s a major step in making programmable, autonomous payments practical at scale. Exciting times for AI + payments intersection. The Machine Payments Protocol (MPP), launched by Stripe and Tempo, enables AI agents (autonomous software entities) to make programmatic, autonomous payments for services, resources, or goods without constant human intervention.
It uses a simple, HTTP-based flow: an agent requests a resource ? the service returns an HTTP 402 “Payment Required” with details ? the agent authorizes often via pre-approved sessions? payment settles instantly on Tempo/stablecoins, cards via Stripe/Visa, Lightning/Bitcoin, etc. ? access is granted.
This unlocks agentic commerce at scale, especially for high-frequency, low-value transactions (micropayments, streaming payments) that traditional billing can’t handle efficiently. Here are prominent, real-world or immediately live examples from the launch announcements, integrations, and early ecosystem: Pay-per-use API access and inference — Agents pay for individual LLM calls, data queries, or tool invocations on demand.
No need for API keys/accounts; just a wallet. Services like OpenAI, Anthropic, Google and others in the MPP directory can charge per request. This enables agents to dynamically switch models or access premium endpoints without setup friction.
Agents spin up headless browsers or run research tasks, paying per session or per query. Browserbase (browser infrastructure) already supports MPP for per-session billing. Parallel.ai integrates for web search, content extraction, and multi-hop research—agents pay per use with no account required.
Agents handle real-world tasks requiring payment. Postalform lets agents fund and send physical mail/letters. Early demos include agents ordering food delivery from a sandwich shop in NYC via integrated services. An agent pre-authorizes a spending cap once, then streams tiny payments as it consumes ongoing resources.
Ideal for agents running complex workflows that rack up thousands of sub-cent interactions. Agents pay for datasets, premium content, or analytics. This powers autonomous research agents that crawl, synthesize, and pay for access across fragmented sources. Agents shop, book travel, or handle logistics on behalf of users.
Examples include paying for flights/hotels via APIs, ordering products, or even coordinating physical delivery. MPP’s multi-rail support makes this seamless across web2/web3. Agents pay for compute/testing infra, code execution environments, or specialized tools without human-gated signups.
This lowers barriers for agent swarms collaborating on tasks. Tempo handles tens of thousands of TPS with sub-second finality and predictable fees in stablecoins—no gas volatility. One-time approval for bounded spending, then autonomous micropayments and streaming.
Sellers add MPP support via Stripe’s APIs in a few lines of code, inheriting fraud tools, reporting. Launch includes 100+ compatible services making discovery plug-and-play. This is still early—agent payments are nascent—but MPP with partners like Visa, Mastercard, Shopify, OpenAI positions it as practical infrastructure for an “AI-native economy.”
Developers can start building via public Tempo RPCs. Agents as true economic actors, paying each other and services fluidly.