Setting up Authorize.net for online payments

If you’re a dealer setting up credit card payments for your SimplePart site, you can choose to use Authorize.net as your payment gateway. This guide will walk you through the process from preparing your merchant account to completing the Authorize.net application.

Before you begin

❗Important: You’ll need an e-commerce enabled merchant account before integrating with Authorize.net.

1. Contact your current credit card merchant processor and request to enable e-commerce on your account.

   • Standard retail (in-store) terminals do not support online transactions.

2. Once your e-commerce account is active, request a VAR sheet from your provider (details below).

Step 1: Complete the Authorize.net application 

✅ Follow these steps to apply for your Authorize.net account:

1. Visit the application link: Authorize.net application

2. Select Payment Gateway Only

3. Complete the application form

   1. When asked for the last four digits of your SSN, you may use the last four of your EIN instead

   2. For the "owner" email field, use the address of the person who will manage the account (e.g., batching, transactions). If the owner won’t be active, use your email address instead

   3. A credit card is required during the application, but it can be updated once your account is activated

4. Submit your application

5. Once submitted, notify your Implementation specialist so we can proceed with the next steps of your setup

What a VAR sheet is (and why it’s important)

A VAR (Value Added Reseller) sheet—also called a tear sheet or parameter sheet—includes the key merchant account information required to connect your payment gateway (Authorize.net) with your merchant account.

Your VAR sheet typically contains:

• Merchant ID

• Processor details

• Business and banking information

You’ll need this document to complete the integration between your merchant account and Authorize.net.

If your merchant account provider is unsure what you need, let them know you’re integrating with the Authorize.net payment gateway and require a VAR sheet to finalize your setup.

Step 2: Retrieve your API Login and Transaction Key

To connect your SimplePart website to your Authorize.net virtual terminal, you’ll need your API Login and Transaction Key.

1. Log in to your Authorize.net account using the credentials from your activation email.

2. Make sure Test Mode is turned OFF and set to LIVE.

3. In the top menu, click Account, then go to Settings.

4. Click API Credentials & Keys.

5. Here you’ll find your API Login and can generate your Transaction Key.

   • To generate a new key, you may need to answer your Secret Question.

   • If prompted, check Disable Previous Transaction Keys to obtain a new key.

6. Copy and paste your API Login and Transaction Key into an email to your Implementation specialist.

⚠️ Do not send screenshots. Due to the sensitive nature and format of these keys, we can only accept text.
If you generate new credentials in the future, send them to [e-mail] along with your dealership name and website URL.

For any account-specific questions, you can also contact Authorize.net directly at 1-866-682-4131.

Need help?

Our in-house Client Services team is available Monday-Friday, 8 a.m. to 8 p.m. EST to help you with any questions or issues. You can reach us in the following ways:

👉 Submit a request through this support form

📞 Call us at 1 [phone]

📧 Email us at [e-mail]

We’re ready to help you get the most out of your SimplePart experience!