MPP (Machine Payments Protocol)
Open HTTP 402 payment protocol from Stripe and Tempo, extensible to stablecoins, cards and Lightning
MPP (Machine Payments Protocol) lets a buyer pay a seller per request over HTTP. A server answers with 402 and a challenge, the client pays with any supported method and retries with a credential, then the server returns a receipt. Sessions let a buyer deposit once and pay per request off-chain.
Stripe and Tempo launched it in March 2026. The core spec is submitted to the IETF. SDKs cover TypeScript, Go, Ruby, Rust and Python; one endpoint can serve both MPP and x402. Stripe's own integration is still a preview.
Pricing: Free
Choosing a payments layer for agents right now?
One click, anonymous. Helps us know our visitors.
Thanks, that helps.
Choosing a payments layer for agents right now?
One click, anonymous. Helps us know our visitors.
Thanks, that helps.
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