{"success":true,"data":{"merchants":[{"id":"merch_demo123","name":"Demo Store","walletAddress":"0x742d35Cc6634C0532925a3b844Bc9e7595f2bD78","allowedOrigins":["http://localhost:3000","http://localhost:3001","https://defi-loan-aggregator.vercel.app"],"createdAt":"2026-05-14T22:56:39.310Z","apiKey":"demo_api..."}]}}