Glossary
Machine Payments Protocol
Machine Payments Protocol is defined here as follows. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. The directory source for this term is Stripe documentation for MPP.
Last verified 2026-10-17
Sources
Listings
Directory listings whose sources describe this mechanism.
| Name | Status | Category | Open source | Mechanism |
|---|---|---|---|---|
| Machine Payments Protocol | Live | Payment rails | Yes | Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. http-402, cards, stablecoins |
| Nevermined | Live | Payment rails | No | Payments facilitator that verifies and settles x402 and MPP charges against a payment plan, with metering and delegated card spending. http-402, metering, cards |
| Tempo Wallet | Live | Payment rails | No | Wallet and CLI that let an agent discover paid services, preview MPP terms, and pay under a max spend cap. wallets, http-402, spend-limits |
Questions
- What is Machine Payments Protocol?
- Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt.
- Which listings use Machine Payments Protocol?
- Machine Payments Protocol, Nevermined, Tempo Wallet.
- When was Machine Payments Protocol last verified?
- Last verified 2026-10-17.