5 Best Swap APIs for Automated Yield Farming

DeFi yield farming now accounts for 36.5% of all DeFi activity, with total value locked peaking at $171.9 billion in late 2025 before stabilizing around $130-140 billion in early 2026 (DeFiLlama). Auto-compounding platforms like Beefy Finance run across 30+ chains, delivering APYs from 8% to 40% by automatically reinvesting rewards -- sometimes multiple times per day (CoinCodex). Every one of those compound cycles requires a token swap. Harvest the reward token, swap it to the LP base asset, re-