What is an MPP Session?

A way to batch many micropayments: you open a session on-chain, transact off-chain against an escrow, and settle once at the end with a final signed voucher, so two on-chain transactions can represent thousands of payments.

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Machine Payments Protocol (MPP)

An open standard for machine and AI-agent payments, co-authored by Stripe and Tempo.

Docs ↗

Data completeness: 70%
Confidence: 85%
Sources: 1
Last reviewed: 7 Jun 2025

The take

What to know

MPP is Tempo's wedge into AI-agent commerce: most payment messages move off-chain while settling against on-chain escrow.

Best for

+AI agents paying per-call or per-token
+High-frequency micropayments
+Usage-based billing

Watch out

The '1M TPS+' figure is an application-level claim, not base-layer throughput

The record

Key facts

Co-authored by: Stripe and Tempo· 90%
Sessions: Open + settle in 2 on-chain transactions via a signed voucher· 85%
Payments Directory: Launched with 100+ integrated services· 80%

Questions

FAQ

What is an MPP Session?: A way to batch many micropayments: you open a session on-chain, transact off-chain against an escrow, and settle once at the end with a final signed voucher, so two on-chain transactions can represent thousands of payments.

The graph