Arc Blockchain Introduces Proxy Payments to Simplify Cross-Chain Integration

Arc, the public blockchain backed by Circle, has rolled out a significant upgrade with the launch of its proxy payment functionality. This new feature is designed to offer developers, particularly those working within the x402 protocol ecosystem, a more streamlined and accessible entry point.

The Hosted Gateway: Facilitator Service

At the heart of this update is the "Facilitator Service," a managed solution that abstracts away the complexities of key management and gas fee handling for developers.

  • Simplified Integration: Developers are no longer required to deploy their own relayer infrastructure or manage sensitive relayer private keys, reducing both security overhead and operational burdens.
  • Gas Sponsorship: The service can sponsor transaction gas fees, eliminating the need for end-users or developers to maintain a separate wallet solely for funding gas costs.

USDC-Centric Multi-Chain Settlement

The proxy payment system is built around the USDC stablecoin, providing a clear settlement pathway. It currently supports on-chain final settlement across three blockchain networks:

  • The Arc blockchain itself, serving as its native settlement layer.
  • The Base network, an Ethereum L2 solution developed by Coinbase.
  • Polygon, a widely adopted Ethereum sidechain and scaling solution.

This multi-chain capability offers applications the flexibility to choose the most suitable settlement layer based on user preference or cost efficiency.

Implications for Developer Workflows

For teams building payment, commerce, or any value-transfer applications, this service directly addresses two common friction points: the security burden of key management and the complex user experience introduced by multi-chain gas fees. By providing a hosted middleware layer, Arc aims to allow developers to focus more on core application logic rather than underlying infrastructure.

While the official announcement did not detail specific technical implementations or fee structures, this move clearly signals Arc's commitment to enhancing its developer toolkit. The goal is to attract more projects to build within its ecosystem and to foster broader adoption of USDC in multi-chain scenarios.