Production gateways can be created in sandbox mode. Using sandbox mode on a production gateway can help uncover integration issues in complex scenarios by processing simulated card data and transactions in the authenticated environment. We only recommend sandbox mode in situations where the gateway integration is difficult and where you don’t want to execute real transactions. It is important to be aware that a gateway sandbox account may behave quite differently from the real production account.
We strongly recommend that you create all your sandboxed gateways in their own environment and add a description that highlights that the gateway is intended for sandbox based transactions only. When interacting with a sandbox gateway, you need to ensure that you’re not using real payment method data; instead you should be using the gateway’s test payment method data. Spreedly's test card data is only guaranteed to work on a Spreedly Test Gateway.
Note: On production accounts, API calls to gateways in sandbox mode are billable.