Mercantile Processing Inc. (MPI) offers a robust suite of business solutions that provide you with a one of a kind experience.


See how MPI can streamline your business:

MPI provides an outstanding payments experience for all of its merchants. As a support based ISO, MPI’s team focuses on providing you with service you expect at a rate that you can afford.

What Our Customers Say

Merchant Tips

  • MPI is excited to announce the addition of ePOS NOW to our family of supported point-of-sale systems. MPI carefully selected ePOS NOW after recognizing a gap in the market for merchants that require a...

  • For many years, there have been a set of tried and true business practices in place that have shaped the way customer to merchant transactions are completed.  Customer selects the product they wish to...

  • The replacement for the Pax S90 is officially here! The Pax S920 works with both the Verizon and AT&T 4G networks, uses a touch screen for prompts and has a keypad for inputting numbers. This upgr...

Mercantile Processing Inc. Headquarters

32695 Roxana Rd.
Millville, DE 19967

Mercantile Processing Inc. Maryland Office

203 Market St.
Suite 302
Havre de Grace, MD 21078
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