Use payment tokens API to save payment methods (for purchase-later transactions)

You can use the payment tokens API (server-side integration) to save a payer’s payment method and use it for future transactions that do not involve checkout or require the payer’s presence. For example, you can use the saved payment method to bill the payer after a free-trial period.     

Using this integration you can,  

• Save credit and debit cards. 
• Save PayPal wallets.