PayPal Button Manager API (NVP)

2Using the Button Manager APIWith NVPThese examples show basic Button Manager API capabilities. The examples show how tocreate buttons and set inventory levels.• Specifying HTML Variables• Creating a Button Using NVP• Offering Multiple Payment Option Subscriptions Using NVP• Offering Installment Plans Using NVP• Offering Automatic Billing Using NVP• Tracking Inventory for Menu Items Using NVP• Using the Button Manager API With Hosted Solution CheckoutSpecifying HTML VariablesWhen you create or update a button using the Button Manager API, you must specify the sameHTML variables that you specify when creating any PayPal Payments Standard button.Although you can use the L_BUTTONVARn field to specify any HTML variables, somevariables are commonly used in specific ways.The following table provides additional information about some of these variables:HTML Variableitem_nameamounta3p3t3NotesName or description of item. Must be specified for Add to Cart buttons.Character length and limitations: 127 single-byte alphanumeric characters.The price or amount of the item. Required for Add to Cart buttons. May notbe used when a dropdown with price (L_OPTION0PRICEn) is defined.Limitations: Value must be a positive number. No currency symbol. Must havetwo decimal places, decimal separator must be a period (.), and the optionalthousands separator must be a comma (,).Price of subscription. Must be specified for Subscribe buttons. Value must bea positive number. No currency symbol. Must have two decimal places,decimal separator must be a period (.), and the optional thousands separatormust be a comma (,).Regular billing cycle. Must be specified for Subscribe buttons. Limitations:Must be a positive integer greater than 0 and less than or equal to 30Regular billing cycle units. Must be specified for Subscribe buttons.Button Manager NVP API April 2012 15