Authorize.net

1. Navigate to How do I obtain my API Login ID and Transaction Key? for instructions on the authorize.net support portal.

2. Copy your API Login ID and Transaction Keys.

3. Navigate to My Distributor > Payment Processors.

4. Select Add Payment Processor.

5. Select Authorize.net.

6. For Login enter your Authorize.net API Login ID.

7. For Secret enter your Authorize.net Transaction Key.

8. Select Save.

Test card numbers

https://developer.authorize.net/hello_world/testing_guide.html

The following test credit card numbers will only work in the sandbox. Use any expiration date after today’s date. If the card code is required, please use any 3-digit combination for Visa, Mastercard, Discover, Diners Club, EnRoute, and JCB; use a 4-digit combination for American Express.