PayPal Express Checkout - 2012 Betriebsanweisung PDF herunterladen (Seite 19)

Express Checkout Integration Guide August 7, 2012 19

Getting Started With Express Checkout

Implementing the Simplest Express Checkout Integration

METHOD=GetExpressCheckoutDetails

VERSION=XX.0

2. Specify your API credentials.

Use the following parameters for a signature:

USER=API_username

PWD=API_password

SIGNATURE=API_signature

3. Specify the token returned by PayPal when it redirects the buyer’s browser to your site.

PayPal returns the token to use in the token HTTP request parameter when redirecting to

the URL you specified in your call to the SetExpressCheckout API.

TOKEN=tokenValue

4. Execute the GetExpressCheckoutDetails API to obtain information about the buyer.

5. Access the fields in the GetExpressCheckoutDetails API response.

NOTE: Only populated fields are returned in the response.

Completing the Express Checkout Transaction

To complete an Express Checkout transaction, you must invoke the

DoExpressCheckoutPayment API operation.

This example assumes that PayPal redirects your buyer’s browser to your website with a valid

token after you call the SetExpressCheckout API. Optionally, you may call the

GetExpressCheckoutDetails API before calling the DoExpressCheckoutPayment

API.

In the simplest case, you set the total amount of the order when you call the

SetExpressCheckout API. However, you can change the amount before calling the

DoExpressCheckoutPayment API if you did not know the total amount when you called

the SetExpressCheckout API.

This example assumes the simplest case, in which the total amount was specified in the return

URL when calling the SetExpressCheckout API. Although you can specify additional

options, this example does not use any additional options.

To execute an Express Checkout transaction:

1. Specify that you want to execute the DoExpressCheckoutPayment API operation and

the version you want to use.

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PayPal Express Checkout - 2012 Betriebsanweisung Seite 19