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Development mode

ePOS Payments is in development. You can find the API specification in development here. If you are interested in gaining access when available then please contact us via our support page

Welcome to ePOS Payments!

Accept payments from your electronic Point of Sale (ePOS) system with Fiserv's ePOS Payments

Our ePOS Payments API empowers you to:

  • Easily integrate payment transactions and administrative functions from your ePOS system
  • Enable payments on the go via wireless connections with PAX A920 SmartPOS mobile payment terminals
  • Centrally manage the connections between your ePOS system and payment terminals/gateway in an automated manner, via Fiserv Digital Portal
  • Accept your customers' preferred payment methods

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nexo Retailer

Our ePOS Payments API is based on nexo Retailer Protocol


Functionalities that it provides

Supported Functionality:

Our ePOS Payments API can be used to verify a customer’s card and complete a payment from your ePOS system, along with, processing secondary actions like Voids, Refunds or Pre-Auth Completions. You can also offer a customer the option to pay in their local currency. Payments can be made when a card is present at the payment terminal and/or when the card or token are on file. Our API also supports administrative functions, for example, receipt printing and re-printing.

In summary the ePOS Payments API provides functionality for the following use cases:

Supported Payment Methods:

Fiserv's nexo ePOS Payments supports you to accept your customers' preferred payment methods Visa, Mastercard, Amex, Maestro, UnionPay International, Discover, Diners Club, JCB, VPay, Visa Electron and Girocard.

Payment Method IconsPayment Method Icons


In the following sections we'll guide you through integrating with our API and using the different capabilities. If you need support, have an idea, or have feedback please contact us.


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