NMI + Shuttle

NMI (Network Merchants Inc.) is a full-commerce payment gateway that powers ISOs, independent software vendors, and payment facilitators across North America. Unlike consumer-facing processors, NMI operates as infrastructure for the payments industry itself, providing the gateway layer that ISOs and ISVs use to connect their merchants to acquiring banks and processors. NMI supports connections to over 200 processors, offers a robust recurring billing engine, and provides payment facilitator tooling that enables platforms to onboard and manage sub-merchants. Their Customer Vault securely stores card data for tokenized transactions, and Level 2/3 data pass-through helps B2B platforms qualify for reduced interchange rates.

Shuttle’s integration with NMI creates a powerful combination for platforms that already use NMI or want to leverage its extensive processor network. Through Shuttle, platforms can connect NMI’s gateway as one of several providers, with NMI’s processor network behind it. Voice Checkout transactions flow through NMI, with card details captured through Twilio Pay, while Links Checkout and the Embedded Payment Layer use NMI’s tokenization. For platforms operating as payment facilitators, Shuttle adds multi-channel support on top of NMI’s payfac infrastructure.

By connecting NMI through Shuttle’s PSP-neutral layer, platforms gain the flexibility to run North American merchants on NMI while merchants elsewhere use globally-focused PSPs. Shuttle normalizes NMI’s transaction responses and webhook events into a unified format, so platforms manage all payment activity through a single integration regardless of which gateway processed the transaction. This architecture is particularly valuable for ISVs migrating from a direct NMI integration to a multi-PSP strategy. Shuttle enables them to retain their NMI processing relationship while gradually adding alternative processors for merchants in new markets or for other payment methods, all without rebuilding their payment infrastructure.