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You can integrate first against the sandbox environment and then switch your base URL to production with the same endpoint structure. Authentication is required in both environments, and responses follow the same formats, but sandbox uses explicit testnet chain keys such as ethereum_sepolia. Sandbox and production base URLs 
Sandbox: https://sandbox.groundtech.co
Production: https://production.groundtech.co
Sandbox focuses on test networks and safe throughput while you integrate. Production processes live funds on supported chains. Keep API keys and configuration separate per environment and reuse the same endpoint paths when swapping the base URL.