You can add money to your account automatically or manually. The minimum amount for a manual recharge is $25. Plivo supports payment by credit card and wire transfer. You can also set up auto-recharge.
What's the minimum amount I can charge to my Plivo account?
How can I add a card to recharge my account?
To add a credit card to your Plivo account, visit the Billing page on the Plivo dashboard. Enter the information in the Payment Details section at the top of the page, then click Add New Card.