{"name":"defi-ops-402","description":"Live cross-verified Arbitrum stablecoin yield data + ready-to-sign deposit calldata + CoW gasless order builder, paid per call via x402 (USDC on Base)","payment":{"protocol":"x402","x402Version":1,"scheme":"exact","network":"base","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0xDfC32f8Cb9d893Dfb9692143A4552B9Ddd352E08"},"endpoints":[{"method":"GET","path":"/api/yields","price":"free","priceAtomic":"0","description":"Live Arbitrum USDC yields across Aave v3, Fluid, Compound v3, and Pendle fixed-maturity markets","params":{}},{"method":"GET","path":"/api/best","price":"$0.02","priceAtomic":"20000","description":"Best Arbitrum USDC venue for a given amount/risk, with optional ready-to-sign deposit calldata","params":{"amount":"USD amount, number, default 100","risk":"\"low\" (money-markets only) or \"medium\" (includes Pendle fixed-maturity), default \"low\"","owner":"optional EOA address to receive a txPlan (approve + deposit calldata)"}},{"method":"POST","path":"/api/cow-order","price":"$0.05","priceAtomic":"50000","description":"Builds a gasless CoW Protocol swap order (quote + EIP-712 order + submission plan)","params":{"chainId":"42161 (arbitrum, default) | 8453 (base) | 1 (mainnet) | 100 (gnosis)","from":"address placing the order","sellToken":"address","buyToken":"address","sellAmountAtomic":"string, atomic units of sellToken","slippageBps":"number, default 100","receiver":"address, default = from"}}],"examples":{"freeEndpoint":"curl https://defi-ops-402.vercel.app/api/yields"}}