Circle Publishes USDC Spec for Machine Payments Protocol

Circle published a formal USDC method specification for the Machine Payments Protocol with three capabilities. The spec standardizes how AI agents and automated services settle payments in USDC across EVM-compatible blockchains and Solana. It includes the first crosschain payment profile in MPP through Circle Gateway. The spec also adds USDCx, a USDC-backed stablecoin on Stacks, and no user figures or transaction volumes accompanied the release.
SOL9.91%
STX3.10%
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