Adds funds to an existing virtual card.

The amount is debited from your PentrraWallet wallet and credited to
the card. Fees are calculated according to your active developer plan
and shown in the response.

Frozen or terminated cards cannot be funded.

In sandbox mode, no balance is debited and no provider call is made.
The card balance is updated locally only.

IP Restriction

In live mode, requests must originate from a whitelisted IP address.
sandbox mode has no IP restriction.