46 Chains, One Interface: Building Unified Multi-Chain DEX Swaps

With over $5 billion in daily DEX volume fragmented across dozens of blockchains, traders face constant friction switching between apps. This guide demonstrates how to build a production-ready multi-chain swap interface consolidating 46 EVM chains into a single, seamless experience using wagmi, viem, and a free swap API. As DeFi platforms compete for user experience, unified cross-chain interfaces have become a critical differentiator.