Magento, with its wide support for multiple payment gateways, makes it easier than ever to accept customer payments. There are a plethora of payment gateways out there, and today we’re going to show you just how easy it is to set up Authorize.net. Authorize.net acts as an intermediary between your Magento store and the vast payment processing networks.

The Process:

• Gather Account-Specific Authorize.net Data
• Enter this Data into Magento
• Enable the Payment Module

I. Gather Account-Specific Authorize.net Data

Once you have an account with Authorize.net, you’ll need to obtain values for these fields:

• API Login ID
• Transaction key
• Merchant’s Email (this you should already have)

To find these, follow these steps (source):

1. Log in to your Merchant Interface at https://account.authorize.net
2. Click Settings in the main left side menu.
3. Click API Login ID and Transaction Key.
4. Under Create New Transaction Key, enter your Secret Answer.
5. Click Submit.

II. Enter this Data into Magento

Log in to your Magento Admin Panel.  Then, using the horizontal navigation at the top, navigate to System > and click Configuration.  Once that page loads, look for and click on “Payment Methods”, found in the left-column under the “Sales” category.  When the page loads, expand the “Authorize.net” area in the main-column by clicking on it.

Add the relevant Authorize.net values from the previous step, and set the various settings to your liking (e.g. which credit cards to accept, whether or not to require CVV validation, etc.)

Authorize.net Settings

III. Enable the Payment Module

While still in the “Authorize.net” area of System > Configuration, change the “Enabled” dropdown (first setting) to “Yes“.

Enable the Authorize.net Payment Module

Finally, click the “Save Config” buton found at the top-right hand side of the screen.