Arc, a layer-1 blockchain developed by Circle, has introduced the Earn Kit SDK. This tool allows developers to integrate USDC and EURC earning features into their applications using TypeScript methods, bypassing the need for custom DeFi protocol development or smart contract creation.
The SDK manages vault discovery, deposits, and withdrawals, while maintaining a non-custodial structure where users retain control of their funds. At launch, the platform supports lending opportunities backed by ETH and BTC collateral, with curation provided by firms such as Steakhouse Financial and Galaxy.
The framework includes support for cross-chain deposits via CCTP and gas sponsorship, potentially eliminating the need for users to hold separate tokens for transaction fees. Pulsar Money Earn and SafePal are the first applications to integrate with the new SDK.
The SDK launched on testnet around September 16, 2026, with a full mainnet deployment anticipated by late September 2026. Initial deposits across USDC and EURC vaults have exceeded $150 million, marking the start of the platform's credit infrastructure.
