PayPal Express Checkout

If you want to enable the PayPal Express Checkout (which is required in order to use PayPal Payments Pro), you'll need three pieces of data from your PayPal account.  They are:

• API Signature -- Username
• API Signature -- Password
• API Signature -- Signature Code

Once you log into your PayPal account, you'll find them under:
Profile>My Selling Tools>API Access [select option 2]>Request API signature

See screen shots below for additional information.