3rd Party Toolkit:
Miva Merchant 4.1.3 - (Download Here)
USAePay does not support Miva Merchant 5.
3rd Party Toolkit Information:
The USA ePay Miva Merchant module is used to connect the Miva Merchant (4.1.3) store / shopping cart with the USA ePay gateway system. This 3rd party toolkit is developed by the AuctionCheckout company and is also required when using AuctionCheckout's software.