Circle's Arc blockchain has launched proxy payments through its new Facilitator Service, providing x402 developers with a hosted access path that accepts USDC. The service enables on-chain settlement across Arc, Base, and Polygon networks without requiring Relayer keys or a separate gas fee wallet. This infrastructure update streamlines integration for developers building on the x402 protocol by removing key management and gas funding complexities. The Facilitator Service handles transaction processing directly, allowing seamless USDC payments and multi-chain settlement capabilities within a single hosted solution.