The future of integrated payments, today.

Cardknox is the leading, developer-friendly payment gateway integration provider for in-store, online, or mobile transactions – hassle-free.


Integrating EMV payments has never been this simple & flexible.

Tap into our native EMV certifications, bypass common challenges, and get ready to take advantage of fast and secure chip-card payments with our leading out-of-scope POS integration.

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No payment integration is too complex

Our solutions make even the most difficult integrations that much easier, so you can get exactly what you need in a lot less time.

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In-Store payments

Our powerful out-of-scope SDK can be integrated with your POS software using only a few lines of code, supporting the most processors and terminals.

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eCommerce payments

With advanced tokenization, recurring billing and secure hosted iFields, Cardknox is the smart and flexible solution for online payments.

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Mobile payments

Our developer kits for iOS and Android will make integrating mobile payments a cinch, and unleash the power of Cardknox for your mobile apps.

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credit card payment processing settings and features image

Unique settings
and features

Supercharge your integration

  • Customized batch scheduling
  • Intelligent transaction routing
  • Proprietary card updater
  • Force debit over credit
  • Void, void release and related commands
  • Powerful tokenization with multi-account support
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Let’s be Partners

Join the industry’s most aggressive and rewarding partner program with full marketing, onboarding and white-glove support, so you can add and retain more merchants.

Learn about a Cardknox partnership
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  • Health clubs
  • Amusement parks & recreation center
  • Cities & municipalities
  • Zoos & wildlife
  • Auto repair
  • Grocery & supermarket
  • Pharmacy
  • Restaurant
  • Car rental
  • Apparel & fashion
  • Jewelry
  • Waste management

Tap into our
industry expertise

With an abundance of niche solutions and built-in rate optimization for a variety of industries, it’s no wonder that software developers across every major vertical have made Cardknox their payment processing gateway of choice.

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By developers, for developers

If you are a developer looking to integrate with Cardknox, we’ll get you integrated with just a few lines of code. Take our sample code generator for a spin, or explore our API documentation.

API documentation    Developer resources

Enjoy a universe of features

Built with a deep understanding of developer, merchant, and customer preferences.

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Intelligent routing

Described by an industry leader as “magical,” we perform over a dozen checks and route the transaction accordingly.

Online fraud protection

Unlike other fraud tools that provide confusing scores, simple Yes/No decisions are given and all approvals are guaranteed.

PCI simplified

With Cardknox, your system never touches actual credit card data, so you are instantly covered with end-to-end Level I PCI-DSS – no strings attached.


Join Cardknox’s EMV developer program and experience our simple solution for EMV integration with POS systems.

Real tokenization

We have developed a true tokenization system that does not simply encrypt sensitive data, but assigns a unique ID for each transaction.

Validated P2PE

A combination of secure devices, applications and processes make transactions completely secure.

Out of 50+ different payment companies I have talked to, Cardknox is by far the best I have worked with. Amazing technology and feature list, exceptional customer and developer support, and unbelievable flexibility. Anything related to payments that we need, Cardknox makes it happen—easy and fast.

Robert Brinton, CEO, Aluvii

“Over my 21 years with Certified, Cardknox has been by far our best processor. Moving our processing to them amidst the whole EMV pin and chip period, and making sure all equipment worked with our POS system, was a huge undertaking that they made seamless. They truly deliver on everything they promise, and their team makes sure that any issue we have is handled as quickly as possible. I highly recommend them and appreciate the years of service they have provided.”

Michele Schoof, Certified Tire

After using PcCharge software for many years to process our credit card transactions, it was necessary to move to a more secure system. After evaluating numerous solutions, we are glad that we chose Cardknox.  Cardknox provides a fast, cost effective, secure credit card processing solution that includes tokenization.  Transitioning to the Cardknox system was a smooth process thanks to the responsive technical and customer service support staff.

Chris Klim, Director of Finance, Jesel Inc 

“It’s such a pleasure to work with Cardknox— their payment solutions and their customer service have both far surpassed our expectations. It’s clear how committed they are to growing our relationship, and we’ve really appreciated their assistance with our marketing efforts and brand awareness. If you’re looking for advanced payment solutions and outstanding customer service, I highly recommend Cardknox.”

Jim Broughton, President, DataWeld Incorporated

“We were previously using Charge It Pro for our merchant processing services, and we were having numerous issues with duplicate transactions. Cardknox solved that issue for us and we also saved money on our processing fees. If you are interested in changing merchant processors, I would recommend you give Cardknox a call.”

Mark Madere, CFO, Driver’s Edge

Meet Cardknox

Cardknox attends key industry shows across numerous verticals. Take the opportunity to meet with a Cardknox payments expert by scheduling a meeting at an upcoming show.

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