Integrate WHMCS and Cybersource

Trexle connects WHMCS to Cybersource and 100+ other payment gateways using a single plugin for one time annual fee

Cybersource and WHMCS Integration Guide

The CyberSource Simple Order API uses public key cryptography to securely exchange information over the Internet. Before you can send requests for CyberSource services using the Simple Order API, you must create a security key for your CyberSource merchant account on the Business Center.

The security key created in the Business Center lasts 2 years.
To generate a security key:
Step 1
Log in to the Business Center.
Step 2
In the left navigation panel, choose Account Management > Transaction Security Keys.
Step 3
In the Transaction Security Keys window, click Security Keys for the Simple Order API.
Step 4
In the Security Keys for the Simple Order API window, click 2048-Bit Key.

Clicking 2048-Bit Key causes the Java applet on the Business Center web site to download 1.5 megabytes of executable code that is used to generate the certificate request in the next step. The download may take several minutes.
Step 5
In the New Security Key window, click Generate Certificate Request.
A warning message may appear.
Step 6
In the warning message window, verify that the certificate is signed by CyberSource, and dismiss the message.
While the new key is generated, messages appear in the Messages text box. Your browser then opens a Save As dialog box.
Step 7
In the Save As dialog box, navigate to a safe location for your key, which is named .p12. Be sure to use separate locations for the test and production environments. Be careful not to overwrite a key in the wrong directory.

* If you do not protect your security keys, the security of your CyberSource account may be compromised.

The last message indicates that the operation finished successfully.
Step 8
To verify that the key is active, go to the left navigation panel and choose Transaction Security Keys > Security Keys for the Simple Order API.
The new key should be listed at the bottom of the table in the Security Keys for the Simple Order API window.

Take the credentials you just obtained from Cybersource and navigate to Trexle dashboard, click Payments Gateways and select Cybersource from the drop down menu as shown below.

Fill into your Cybersource credential and click Add Gateway. Click the Activate button next to Cybersource, and it will give you a success message and the button will turn into green. You should see something like below.

To integrate Cybersource and WHMCS you need Trexle API keys

How to install Trexle extension to WHMCS

  1. Download Trexle extension from Trexle- WHMCS Github repository or from WHMCS Marketplace.

  1. Use your cPanel file manager or ftp to upload the downloaded extension to the modules/addons folder of your WHMCS installation


  1. Go to your WHMCS admin panel Addons section

  1. Click on Your Addons link in the left menu, and you will see your newly uploaded Trexle extension .

  1. Click on the Activate link to the right side of the newly uploaded Trexle addon

You have successfully added Trexle extension to your WHMCS.

Create a test product, logout from your admin session and test the checkout as a regular customer.

Testing Credit Card Services
Use the following test credit card numbers to test the authorization, capture, and credit services. Do not use real credit card numbers.

American Express 3782 8224 6310 005
Discover 6011 1111 1111 1117
JCB 3566 1111 1111 1113
Maestro (International) 5033 9619 8909 17 , 5868 2416 0825 5333 38
Maestro (UK Domestic) 6759 4111 0000 0008, 6759 5600 4500 5727 054 , 5641 8211 1116 6669
Mastercard 2222 4200 0000 1113 , 2222 6300 0000 1125, 5555 5555 5555 4444
UATP 1354 1234 5678 911
VISA 4111 1111 1111 1111

Cybersource Supported Countries

Cybersource Supported Payment Processing Actions

✔ Purchase
✔ Authorize
✔ Capture
✔ Void
✔ Credit
✔ Recurring
✖ Card Store

Key Features

Credit Card Vault: securely store your customers sensitive credit card data using tokens.
Instant PCI-DSS Compliance: your customers credit card data never touches your site or server.
Multiple Gateway Support: Connect your WHMCS site to 100+ payment gateway

About Trexle

Trexle is a powerful online recurring subscription billing platform that integrate Cybersource and other +100 payment gateways with WHMCS and other dozen of e-commerce platforms.

About Cybersource

Access the high-availability, secure CyberSource payment gateway via One API integration and process transactions from any IP enabled payment channel (web browser, mobile browser, POS, or IVR) across the globe. Connect to the processor or acquirer of your choice, accept digital-based payments from consumers in over 190 countries and territories and get consolidated reporting across processors and payment types.


WHMCS is the leading web hosting management and billing software that automates all aspects of your business from billing, provisioning, domain reselling, support, and more. WHMCS easily integrates with all the leading control panels, payment processors, domain registrars and cloud service providers.