What It Is
Major protocol upgrade released December 11, 2025, introducing multi-chain support by default, modular architecture, wallet-based access control, and automatic API discovery.
How It Fits in x402
protocol-upgradespecification
both
BaseSolanaEthereumNetwork
USDCstablecoinslegacy-payments
Developer Notes
typescriptpythongojava
Middleware
clientserverfacilitator
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About x402 Guild
x402 Guild is a community-driven effort to maintain an open x402 dataset and a periodic “State of x402” report.