Circle has released three developer kits enabling applications on its Arc platform to embed stablecoin purchases, lending, and borrowing functionality directly into their products. The new toolset aims to streamline integration of core financial services within the Circle ecosystem. The Borrow Kit facilitates USDC loans collateralized by cirBTC through Morpho, extending a lending model previously exclusive to Circle Mint's institutional clients to a broader range of developers. This expansion allows third-party apps to offer institutional-grade borrowing capabilities using Circle's infrastructure.