"After six months of real-world usage, the open payment standard x402 has received a major update, extending the protocol beyond single-request, exact-amount payments. The release adds support for wallet-based identity, automatic API discovery, dynamic payment recipients, expanded multi-chain and fiat support via CAIP standards, and a fully modular SDK for custom networks and payment schemes. V2 is a major upgrade that makes the protocol more universal, more flexible, and easier to extend across networks, transports, identity models, and payment types."
"x402 V2 offers a unified payment interface supporting stablecoins and tokens across multiple chains, including Base, Solana, and others, while maintaining compatibility with legacy payment rails such as ACH, SEPA, and card networks. In also introduces per-request routing to specific addresses, roles, or callback-based payout logic, enabling complex multi-step payment workflows. Another enhancement in x402 V2 is the clear separation between the protocol specification, its SDK implementation, and facilitators (responsible for verifying and settling the payment on-chain), improving extensibility and enabling a modular, plug-in-based architecture."
x402 V2 expands the open payment standard to support payments beyond single-request, exact-amount flows. The update adds wallet-based identity, automatic API discovery, dynamic payment recipients, and a fully modular SDK for custom networks and payment schemes. The specification adopts CAIP and IETF header conventions to provide a single interface for onchain and offchain payments. V2 supports stablecoins and tokens across multiple chains while maintaining compatibility with ACH, SEPA, and card rails. The protocol separates the spec, SDK, and facilitators to enable extensibility and plug-in architectures. Wallet sessions, modular paywalls, and configurable facilitator selection reduce latency and simplify developer configuration.
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