Choosing a payment integration: Converge API, Commerce SDK, TSI or Fusebox

Choose by where you take payments: use the Converge API for online and card-not-present payments, the Commerce SDK for card-present payments inside your own POS or mobile app, Terminal Semi-Integration (TSI) to link your cash register to an Ingenico Desk 5000 or Move 5000, and Fusebox / Simplify for lodging.

  • Applies to: Converge API, Commerce SDK, Terminal Semi-Integration, Fusebox / Simplify
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Elavon’s APIs and SDKs come with dedicated ongoing support from an assigned solution engineer.

Which option is for online and card-not-present payments?

Converge API

Converge is Elavon’s payment platform for taking payments in any setting, and the Converge API connects your website or app to the Converge gateway.

  • PCI-compliant ways to collect card details: Hosted Payment Page, Checkout.JS and Lightbox
  • Bring your own device through the XML API
  • Tokenization, recurring and installment billing, and Account Updater for Visa and Mastercard

Read our Converge API articles, or Elavon’s developer guides for the XML API, Hosted Payment Page and Checkout.js.

Which option is for card-present payments in my own app?

Commerce SDK (CSDK)

The Commerce SDK is a developer kit for adding secure card-present payments to your point of sale or mobile app. Your app takes the payment on a peripheral, and the transactions land in Converge.

  • Connects to a secure, pre-certified EMV device
  • Works with Windows PC, iOS and Android
  • Tokenization, recurring and installment billing, and Account Updater for Visa and Mastercard

Read our Commerce SDK overview or Elavon’s Commerce SDK documentation.

Ingenico Desk 5000 countertop terminal and Move 5000 portable terminal
Terminal Semi-Integration (TSI)

TSI uses Elavon’s developer toolkit to connect your cash register to an Elavon payment terminal, so staff enter each sale once on the register instead of twice.

  • The connection between your POS and Elavon runs through a supported Ingenico terminal: the Tetra smart terminals Desk 5000 and Move 5000 (the Desk/3500 is also listed for TSI in the US)
  • Of these options, it has the simplest PCI compliance requirement

Read our TSI overview.

Which option is for hotels and lodging?

Fusebox / Simplify

Fusebox is an enterprise payment gateway owned and run by Elavon / U.S. Bank, widely used in lodging. Simplify is its card-present part.

  • Card-present, card-not-present and e-commerce payments, plus pay at the table
  • Validated point-to-point encryption (P2PE)

Read our Fusebox / Simplify articles, or Elavon’s Fusebox and Simplify guides.

Not sure which one fits?

Answer the questions in the selector below.

Common questions

Does Converge have a hosted payment page?

Yes. The Hosted Payment Page is one of the PCI-compliant options in the Converge API, alongside Checkout.JS and Lightbox. See Elavon’s Hosted Payment Page guide.

Who can help me decide?

Elavon’s integrations come with ongoing support from an assigned solution engineer. For general questions, contact Cartis at 1-888-712-0770 or support@cartispayments.com.

Updated November 2, 2026

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Building payments into your software? See Cartis payment integration

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