How do I integrate Checkout with PrestaShop?

Here's how:

  1. Log in to your PrestaShop admin panel.
  2. Select Modules > Modules and Services.
  3. Click Installed modules.
  4. Click Configure next to PayPal USA, Canada (under Recommended Payment Gateways).
Note: If you do not have the PayPal USA module installed, it is available at:
  1. Select Enabled for PayPal Checkout.
  2. Click Enable selected products.
  3. Complete your PayPal Checkout integration as follows:
  • Mode - Select Live.
  • PayPal Business Account - Enter your PayPal email address.
  • PayPal API Username - Enter the PayPal API username.
  • PayPal API Password - Enter the PayPal API password.
  • PayPal API Signature - Enter the PayPal API Signature.
  • Show Express Checkout - Check both boxes (for Product Page and Shopping Cart).
  1. Click Save Settings.

See also:
How do I request API Signature or Certificate credentials?
Prestashop Support