USAePay Integration

This document details how to connect the USAePay payment gateway to accept payments and how our integration works.


The USAePay payment gateway on Invoiced supports the following features:

Capability Supported
Credit card payments
ACH payments
Vaulting cards
Vaulting bank accounts
Level 3 Processing
Apple Pay


Connecting USAePay is a straightforward process. Follow these steps to start accepting payments through USAePay in minutes. These steps assume you already have a USAePay account.

  1. From the Invoiced dashboard go to SettingsPayments.

  2. Click Setup on the payment method you want to accept.

  3. Select USAePay as the payment gateway.

  4. Click Connect to USAePay.

  5. Enter in your USAePay Merchant Key and Merchant PIN and click Save. Then click Enable and the payment method you selected should be enabled.

Client Workflow

Credit Cards

Paying with credit or debit card is fairly straightforward for customers. They simply enter in their cardholder information and click Pay. We give receipts to your customers after a successful payment.

Pay Invoice with Credit Card


Customers can pay with ACH just as easily as with credit cards. The key difference is that ACH payments will take several business days to clear. When customers are on a payment form they will select ACH as the payment information and then enter in their bank account and routing number.

Pay Invoice with ACH