Experience a Partner Program that is generously rewarding .

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

With Cardknox, no payment integration is too complex.

Here’s how we’ll make your life easier—so you can focus
on growing your business.

In-Store API Payment Integration

Tightly integrate out-of-scope, in-store payments including EMV chip card, ACH, Gift Card, EBT Food Stamp, EBT Cash Benefits, and EBT eWIC.
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E-commerce Integration

Enjoy a robust API supporting recurring payments, proprietary card updater, guaranteed fraud decisions, and advanced tokenization. Or choose from shopping cart plug-ins, gateway emulators, and hosted payment forms.
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Mobile Integration

Integrate SDK for iOS and Android for card-not-present and card-present mobile transactions with native support for mPOS EMV chip-card hardware and processing.
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Integrate Cardknox Payments With a Few Lines of Code

Tap into Cardknox’s advanced SDK and standalone processing solutions to provide clients with payment solutions that meet their needs.
We’ll take care of risk management, underwriting and onboarding, ensuring that you stay compliant with payment security requirements.
Read the SDK Docs >

White-Glove Customer Service

Cardknox offers a single phone number to get the help you need now — as opposed to other providers who keep you waiting days for an email reply. Our customer support teams are based in the U.S. and deliver a white-glove, hands-on experience — for any type of merchant or developer support.
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Google Customer Reviews
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Our Payment Processing Tools

With our wide selection of solutions for online, in-person, and over-the-phone payment processing, you’ll be able to cater to the needs of your clients with greater ease. Cardknox Go supports credit and debit cards (EMV, contactless, magstripe), mobile wallets, ACH, EBT, and more.
  • E-commerce integrations
  • POS and terminal integrations for card-present transactions
  • PaymentSITE online payment form
  • Email and Text-to-pay invoicing
  • Cardknox Merchant Portal virtual terminal
  • Recurring payment scheduling
  • Cardknox Mobile App
  • PhonePay interactive voice response system

Manage Sub-Merchant Accounts and Payouts

We’re giving you full control over the sub-merchant payment processing experience. You’ll have access to the Cardknox Partner Portal, an advanced online platform that centralizes the entire payment integration and account management process.
  • Manage leads and onboard new accounts
  • Handle disbursements of funds and split payments
  • Order equipment and add features to your accounts
  • Generate tickets with our in-house customer support teams

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