# Build Your Own Crypto Payment Gateway with XPayLabs (xpay): Architecture, SDKs, and Production Deployment Accepting crypto payments doesn't have to mean paying 1% to BitPay or trusting Coinbase Commerce with your private keys. With modern tools, you can self-host a production-grade gateway that supports **USDT, USDC, DAI, and BUSD** across **TRON, Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Avalanche, Base, and SUI** — with zero transaction fees. This article breaks down the architect...