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Following our initial Circle Modular Wallet integration, we went deeper into the documentation and confirmed that Arc Testnet is fully supported with SCA, Gas Station, and deployed contracts.

We’ve now extended passkey authentication across all 8 Circle-supported 

One passkey registration → Face ID / biometrics → the same Smart Account address is generated across every chain. No seed phrases, no browser extensions, no gas fees (powered by Circle Paymaster).

Users can switch chains instantly from the navbar dropdown without re-authenticating. The credential is chain-agnostic - only the transport layer is re-initialized when switching.

Our protocol already supports crosschain USDC deposits from 7 networks (Ethereum, Polygon, Arbitrum, Base, Optimism, Avalanche, Arc). With passkey multi-chain support, users on any of these networks can now access Meridian’s yield infrastructure using just their fingerprint or face - no wallet setup required.

Next step: Circle on/offramp integration enabling users to go from fiat to DeFi treasury yield in a single flow.

🔄Update: Passkey Multi-Chain Support - All 8 Circle Testnet Chains Now Live

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