Integration Guide

Table Of Contents

Third-Party Shopping Carts – The Cart Upload Command

Integrating PayPal with Third Party Shopping Carts

250 September 2008 Website Payments Standard Integration Guide

quantity_2; the third item with variables like item_name_3, amount_3, and

quantity_3; and so on.

IMPORTANT: The _x values must increment by one continuously in order to be recognized.

If you skip from item #1 to item #3 without defining an item #2, the third

item will be ignored.

The minimum required HTML for your post to PayPal looks similar to the following.

EXAMPLE 5.1 HTML for Passing Individual Item Detail to PayPal

</form>

Setting Currency in the Cart

All monetary variables (amount_x., shipping_x., shipping2_x, handling_x, tax_x.,

and tax_cart) are interpreted in the currency designated by the currency_code variable

posted with the payment. Because currency_code is not item-specific, there is no need to

append _

x to the currency_code variable name. If no currency_code variable is posted,

all monetary values default to U.S. Dollars.

Setting Tax on Individual Items

Use the tax_x variable to specify the tax for a particular item in the cart. For example, the

following line specifies that the tax on item 2 in the cart is 15 cents:

Setting Shipping Charges on Individual Items

Use the weight_x and weight_unit variables to specify item weights if the merchant’s

profile-based shipping rates are based on weight. For example, the following lines specify the

weight of item 3 in the cart as 1.5 kg.

Use the quantity_x variable if the merchant’s profile-based shipping rates are based on

quantity. For example, the following line specifies that the quantity for item 3 in the cart is 6.