The Authorize.net add-on allows you to accept credit card payments from you customers without them ever having to leave the site.
If you don’t already have an account with Authorie.net, you will first need to create one. Once you’ve done so, you’ll need to find your API Login ID, Transaction Key and MD5 Hash Value which you’ll enter into your Authorize.net add-on settings. If you want to enable Sandbox Mode in Authorize.net, you’ll also need to collect your Sandbox API Login ID, Sandbox Transaction Key and your Sandbox MD5 Hash Value.
To use the Test Mode option, you will need to enable Test Mode both in Exchange and Authorize.net itself.
In the settings for the add-on, you can also customize your purchase button text.