Accept PayPal payments in your online store.

PayPal allows your customers to make payments in your app or website using funds added to their PayPal account. Use the emerchantpay PayPal API to accept PayPal as a payment method across all of emerchantpay’s payment integrations.

Payment method Countries/regions Supported payments
eWallet Global PayPal Wallet (funded via card, bank account, )


1. Create a PayPal payment request

To submit a payment using PayPal, create a PayPal payment request to the emerchantpay Genesis payment gateway. Specify pay_pal as the transaction_type and the type of payment in payment_type.

Accepted PayPal payment types:

Example of passing an PayPal transaction request:

<?xml version=”1.0″ encoding=”UTF-8″?>
<usage>40208 concert tickets</usage>

2. Receive a response

You will receive a Success or Error response to your payment request.

Example of a Success response:
 <?xml version=”1.0″ encoding=”UTF-8″?>
<avs_response_text>Response provided by issuer processor; Address information not verified</avs_response_text>
<descriptor>Descriptor one</descriptor>

Asynchronous notification

Because the PayPal payment transaction is asynchronous, the result of your customer’s payment is sent as a separate HTTP POST notification from the gateway to the notification_url that you supplied with the transaction request.

Example of a notification for an PayPal transaction:

Use the signature field to verify that the notification has been sent by the Genesis gateway. Each session signature is generated by combining the unique_id of the transaction and your API password, and generating a SHA-1 hash function of the combined string.

signature = SHA-1 hash value of <unique_id><API password>

Notification signature examples:
unique_id API password signature
26aa150ee68b1b2d6758a0e6c44fce4c 50fd87e65eb415f42fb5af4c9cf497662e00b785 c5219b3d385e74496b2b48a549
3f760162ef57a829011e5e2379b3fa17 50fd87e65eb415f42fb5af4c9cf497662e00b785 14519d0db2f7f8f407efccc9b099

After you have verified the notification state and validity, render an XML page containing the transaction’s unique id to acknowledge that you have received the notification.

Example of a notification reply you use to confirm a notification:
<?xml version=”1.0″ encoding=”UTF-8″?>

3. Test your integration

Before you can accept live payments, you must test your integration in the emerchantpay staging environment.

  1. Add an item to your cart in your online store.
  2. Proceed to the checkout page and check out using the PayPal button.
  3. Follow the redirect link to PayPal’s website
  4. Log in to PayPal.
  5. Set the payment status to Confirm.
  6. Log in to Genesis.
  7. In the navigation menu, go to Payment transactions.
  8. Verify that the transaction appears at the top of the list and is successful.

4. Accept live payments

After you have successfully tested your PayPal integration, you are ready to move to the production environment and accept live payments. Contact your emerchantpay Account Manager to get your login credentials for the Genesis production environment.

You are now ready to accept live payments using PayPal.