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The Nayax Marshall SDK offers a diverse range of payment flows, each designed to meet specific operational needs and dictate precisely how your system handles vending sessions, payment authorizations, and transaction processing. The following pages provide a more detailed description of each one:

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Single Session Flows

Single Session with Pre-Selection

Separate product selection from payment authorization in a single transaction.

Single Session with Pre-Authorization

Approve payment before the customer selects a product to minimize risk.

Single Session Pre-Authorization with External Settlement

Let a third-party server trigger final settlement or cancellation.

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Multi-Vend Flows

Multi-Vending with Pre-Selection

Dispense multiple selected products after the customer completes one payment.

Multi-Vending with Pre-Authorization

Let customers buy multiple products after a single upfront authorization.

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Multi-Session Flows

Multi-Session

Separate product selection from authorization and settlement across sessions.

Multi-Session Pre-Authorization with External Settlement

Manage multiple parallel transactions with an external settlement server.

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Additional Flows & Features

Sub Flows & Features

Start a transaction from product selection when full pre-selection isn’t available.
If you are unsure which flow is ideal for your machine type, the following table shows the recommended flow and configuration.