Payment Gateways and Integrated Payments

Connect your software, website, or POS to secure payment processing with flexible gateway solutions from Mercantile Processing Inc.

Secure connections • Flexible integrations • Supported by MPI

Payments That Work Behind the Scenes

Wide Compatibility

Support for a broad range of shopping carts, software platforms, and POS systems.

Woman holding credit card and phone for online shopping.
Woman holding credit card and phone for online shopping.
Secure Transactions

Gateway solutions built to protect payment data and reduce risk.

Our team helps ensure your gateway is properly configured and connected.

Guided Setup
person holding black iphone 5
person holding black iphone 5
Facebook login screen with username and password fields.
Facebook login screen with username and password fields.

Flexible Gateway Solutions for Modern Payments

MPI provides payment gateway and integrated payment solutions that allow businesses to accept payments online, through software platforms, or directly within their POS system. Whether you’re running an eCommerce site, invoicing customers, or connecting specialized software, we help ensure payments flow smoothly and securely.

  • Online & eCommerce payment acceptance

  • Software and POS integrations

  • Virtual terminal access

  • Invoicing and payment links

  • Secure transaction processing

Payment Gateway FAQs

What is a payment gateway?

A payment gateway connects your website, software, or POS system to payment processing so transactions can be securely authorized and completed.

Are payment gateways secure?

Yes. Gateways follow industry standards designed to protect payment data.

Do gateways work with existing websites or software?

Yes. Many gateway solutions support common platforms and integrations. MPI helps confirm compatibility before setup.

Can gateways integrate with POS systems?

Yes. Many POS systems use gateways to process payments directly within the platform.

Can I accept online payments without a full eCommerce site?

Yes. Options such as virtual terminals and payment links allow you to accept payments without a traditional online store.

Connect Your Payments with Confidence

Whether you need online payments, software integration, or gateway support, MPI helps you choose a solution that fits your systems and your goals.