Quick Answer
What Is Machine Payments Protocol (MPP)? Stripe's AI Agent Payment Standard
What Is Machine Payments Protocol (MPP)?
Machine Payments Protocol (MPP) is an open standard for AI agent payments created by Stripe and Tempo, launched alongside Tempo’s mainnet on March 18, 2026. It lets AI agents and autonomous software pay for services using stablecoins — without human approval.
Last verified: March 2026
Quick Facts
| Detail | Info |
|---|---|
| Created by | Stripe + Tempo |
| Launched | March 18, 2026 (with Tempo mainnet) |
| Type | Open payment standard for AI agents |
| Blockchain | Tempo (L1, EVM-compatible) |
| Backers | Stripe, Paradigm |
| Compliance | ISO 20022 |
How MPP Works
- AI agent needs a service — Queries an API, accesses data, or requests compute
- Service advertises MPP terms — Price, token, and Tempo wallet address
- Agent authorizes payment — Sends stablecoin on the Tempo network
- Transaction settles — Near-instant, low-cost confirmation
- Service delivers — Agent receives the requested resource
Tempo Blockchain
Tempo is purpose-built for machine payments:
| Feature | Detail |
|---|---|
| Type | Layer 1 blockchain |
| Consensus | Optimized for payment finality |
| Compatibility | EVM-compatible |
| Compliance | ISO 20022 (banking standard) |
| Backed by | Stripe ($70B+ valuation), Paradigm |
| Target | High-volume, low-cost stablecoin transactions |
MPP vs x402 vs Traditional Payments
| Feature | MPP (Stripe/Tempo) | x402 (Coinbase) | Visa AI Tools |
|---|---|---|---|
| Protocol | Blockchain-native | HTTP-native | Card rails |
| Settlement | Near-instant | On-chain (~seconds) | 1-3 days |
| Micropayments | Yes | Yes | Limited |
| Enterprise compliance | ISO 20022 | Basic | Full |
| Human required | No | No | Sometimes |
| Existing infrastructure | Stripe integration | Coinbase ecosystem | Visa network |
Why Stripe Built MPP
Stripe processes $1 trillion+ in payments annually. Building MPP positions them as the payment infrastructure for the agentic economy:
- Existing merchant base — Millions of Stripe merchants can accept agent payments
- Enterprise compliance — ISO 20022 compatibility for regulated industries
- Scalability — Purpose-built blockchain vs. retrofitting existing chains
- Agent-to-agent — Native support for autonomous software transactions
Use Cases
- SaaS billing for AI agents — Agents subscribe to and pay for API services
- Cloud compute — AI agents autonomously purchase GPU time
- Data marketplace — Agents buy and sell data sets
- Agent-to-agent services — One agent hires another for a subtask
The Emerging AI Payments Stack
The landscape is splitting into two camps:
Crypto-Native
- x402 (Coinbase) — HTTP-native stablecoin payments
- MPP (Stripe/Tempo) — Blockchain-native agent payments
- World AgentKit — Identity verification for agent transactions
Traditional Finance
- Visa Agent Tools — Card-based agent payments
- Mastercard Agent Pay — Card-based agent commerce
- Crossmint — Virtual credit cards for AI agents
Both approaches are growing rapidly as autonomous AI agents create demand for machine-to-machine payment infrastructure.
Last verified: March 2026