NOTE: If you just want to use PayPal Payments Standard with your PayPal Business or Premier account, rather than upgrading to PayPal Payments Pro, just follow these instructions instead of using the procedure below.
Step 1: Register here for an E-junkie account if you don't have one.
Look for API Access under the Selling Online section and click Update;
Click Grant API Permission (or if you'd added permissions before, click Add or Edit API Permissions and then click Add New Third Party);
The Add New Third Party Permissions page appears;
Enter our Third Party Permission Username: robin_api1.19.5degs.com
(you can copy and paste to make sure you enter this accurately);
Click the Lookup button. Our partner username will then be verified and you will be shown a list of permissions that you can give us;
Checkmark the following boxes under the list of Available Permissions:
Use Express Checkout to process payments
Process your customers credit or debit card payments
Authorize and capture your PayPal transactions
Click Add or Save;
Log into your E-junkie account;
Go to your E-junkie Seller Admin > Edit Payment Preferences screen;
Checkmark the box for PayPal Payments Pro and click Submit.
Now you're ready to start adding products to sell, so you can obtain E-junkie Cart buttons to place on your site. If you have already added products in Seller Admin and placed E-junkie Cart buttons on your site, then your existing cart buttons will automatically start offering buyers a card-based checkout option in your E-junkie Cart.