In order to use PayPal as a payment method from your site, Yahoo! needs to be able to communicate with PayPal on your behalf. This communication happens by using several PayPal APIs (application programming interface) which allow the two separate systems to communicate securely using an agreed upon format. Each set of actions either performed by a buyer (logging in to PayPal from a link on a merchant's site) or a merchant (capturing funds for an order) requires the use of PayPal APIs.

As part of the process of setting up PayPal, you must log in to PayPal and enable the PayPal APIs that are specific to the Yahoo! integration.

To enable API Access with PayPal:

1. From the Store Manager, click the "Pay Center" link appearing in the Order Settings column.
2. Click the "PayPal Express Checkout" or "PayPal Website Payments Pro" link depending on the service you are setting up.
3. Log in to PayPal.
4. Click Go for the API Set-up step.
5. Click Give Permission to grant access for Yahoo! to make calls on your behalf to PayPal for performing various functions (refunds, sales, voids, authorizations, etc...).

See Also

• Getting Started with PayPal Express Checkout
• Choosing PayPal as a payment processor
• Sign up for a PayPal Business account
• Displaying PayPal as a payment option