API Interface (Vending)

An interface is the agreed protocol by which two systems exchange data — in vending, typically between telemetry platform, inventory management, and accounting. Without it, sales figures are exported as spreadsheets, passed along, and eventually entered by hand.

When evaluating an API, three factors matter: what data it exposes, how current that data is, and whether usage is included in your contract or charged separately. The third point is most often overlooked — and it determines whether the integration remains cost-effective.