This section describes how to setup PayPal Express Checkout for your ViArt shopping cart. Please, carefully follow all the instructions below.

To correctly configure thePayPal Express Checkout payment system in your shopping cart you are to make appropriate settings for it. First, you are to create a Paypal Account (if you do not have one).

To open a business PayPal account, please do the following steps:

1. Go to: Paypal Website
2. Click Sign Up Today.
3. Set up an account for Business Owners.
4. Follow the instructions on the PayPal site.

If you already have a Personal or Premier account:

1. Go to: Paypal Website
2. Click the Upgrade your Account link.
3. Click the Upgrade Now button.
4. Choose to upgrade to a Business account and follow instructions to complete the upgrade.
5. If you haven't already, add a bank account to become a Verified member. Follow the instructions on the PayPal site. This process may take 2-3 business days.

When your account is created you are to request an API Certificate within your PayPal account.

Security note:It is recommended to keep your certificate outside web root folder and upload it one level up, for example in the folder /home/yourhomefolder/ and not in 'htdocs' or 'public_html' subfolder which is usually your web root folder, so no one can download your PayPal security certificate via web and use it for hacking your PayPal account.

Setup API Access

First-party authentication: Download API certificate

1. Log in to your PayPal account and click the Profile subtab.
2. Click the API Access link under the Account Information column.
3. Click the Request API Credential link.
4. Select the type of credential.
5. If you selected API SSL client-side certificate, click Download Certificate on the Download or Remove API Certificate page. You will be prompted to download a file called cert_key_pem.txt. This file is your API Certificate. Be sure to write down the name and location of the certificate.

ViArt Shop Configuration for PayPal Express Checkout

When all necessary settings are made, the next step is to make correct configuration settings in your shopping cart. For this go to Administration > Orders > Payment System, select PayPal Express Checkout and click the ‘Edit System’ link. Then, fill the general fields if necessary as described in the Section 4.2.1.1.

In the parameters list, please specify specify your API information like 'Username', 'Password' and 'SSLCert'.

Testing on the Sandbox

Note: For testing with the PayPal SandBox please change a 'sandbox' parameter value to '1'.