{"slug":"mpp","title":"Machine Payments Protocol (MPP)","description":"MPP (mpp.dev, tempoxyz/mpp-specs) — an open standard for machine-to-machine payments co-authored by Tempo and Stripe. Standardizes HTTP 402 via a 'Payment' HTTP auth scheme so any client (AI agent, app, human) can pay inside one HTTP request. Payment-method agnostic across 10 rails.","tags":["mpp","payments","agents","http-402","tempo","stripe","x402"],"category":"agents","scope":{"covers":"The MPP spec repo (tempoxyz/mpp-specs, snapshot 2026-08-10, all draft-00): the core Payment HTTP auth scheme (402 challenge/response, headers, problem codes), charge & subscription intents, the discovery extension, the MCP transport extension, the Rust SDK (mpp-rs) integration angle, spec-authoring/extension points, the community ecosystem registry, and one entity page per payment method (card, EVM, Solana, Stellar, Hedera, Lightning, NEAR Intents, Stripe, Tempo, USDC) with charge/session/subscription support.","notCovered":"x402 (a separate but overlapping protocol — noted where relevant, not documented); rails without a published draft; production/mainnet deployment specifics; no XL tier yet (draft-stage).","currentAs":null},"lastUpdated":null,"documentCount":22,"raw_base":"/raw/mpp/","html_base":"/wiki/mpp/","xl":null,"documents":[{"path":"README.md","title":"LLM Wiki","type":null,"updated":null,"gated":false},{"path":"wiki/index.md","title":"Machine Payments Protocol (MPP) Knowledge Base","type":null,"updated":null,"gated":false},{"path":"wiki/concepts/ecosystem.md","title":"MPP Ecosystem and Registry","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/extending-mpp.md","title":"Extending MPP (Spec Authoring)","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/mcp-transport.md","title":"MCP / JSON-RPC Transport Extension","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/mpp-overview.md","title":"MPP Overview","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/payment-discovery.md","title":"Payment Discovery Extension","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/payment-http-auth-scheme.md","title":"The Payment HTTP Authentication Scheme","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/payment-intents.md","title":"Payment Intents (Charge and Subscription)","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/concepts/using-mpp.md","title":"Using MPP (Rust SDK Integration)","type":"concept","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-card.md","title":"Method: Card","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-evm.md","title":"Method: EVM","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-hedera.md","title":"Method: Hedera","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-lightning.md","title":"Method: Lightning","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-near-intents.md","title":"Method: NEAR Intents","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-solana.md","title":"Method: Solana","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-stellar.md","title":"Method: Stellar","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-stripe.md","title":"Method: Stripe","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-tempo.md","title":"Method: Tempo","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/method-usdc.md","title":"Method: USDC","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/entities/methods-catalog.md","title":"MPP Methods Catalog","type":"entity","updated":"2026-08-10","gated":false},{"path":"wiki/log.md","title":"Change Log","type":null,"updated":null,"gated":false}]}