Quickstart ↗How to implement a payment client.API Reference ↗Versioned endpoints and response contracts.Architecture ↗Platform, execution backends and common ledger.Funding & Guarantees ↗Per-payment authorization, prefunding and provider guarantees.Network Capabilities ↗Query supported assets and routes at runtime.Agent Integration ↗MCP, x402 and delegated payments.Sandbox guide ↗Test quotes, payment creation, and final settlement.OpenAPI ↗Machine-readable discovery and sandbox contracts.
Integration invariant
Every user interface and machine interface must refer to the same underlying payment ID, status model and authoritative payment ledger.