Build a USDC Payment-Gated App with Circle SDK

The article provides a comprehensive guide on integrating Circle's SDK to develop a Next.js application with a USDC paywall, allowing for seamless on-chain payments using the stablecoin USDC. It explains the advantages of USDC, such as near-instantaneous and low-cost transactions, and outlines the steps to create a token-gated content app using tools like the Circle libraries, Web3 library wagmi, and React framework. The process involves setting up a MetaMask wallet, creating a payment intent, connecting a wallet, and confirming payments to access premium content. The piece also suggests enhancements for a production-ready app, such as improving the user experience, preserving payment information, and securing content with backend gating to prevent unauthorized access. Overall, it demonstrates how integrating USDC can future-proof payment systems and expand access to global transactions.