events_webhook_url, amount.tip, cashback_amount and query_deferred. The last three only take effect when the matching capability is enabled in the DMS; otherwise the terminal ignores them.TERMINAL_ACKNOWLEDGED event as soon as the terminal accepts the payment intent. That acknowledgement is not the transaction result — the outcome, and every intermediate state, arrives as a POST to the events_webhook_url you supply. Omit the URL and the transaction still runs, but you never learn how it ended.🚧 Beta — Early Access
This API is in early access. Endpoints, parameters, and response structures
may change without prior notice. Do not deploy to production without
coordinating with the Kushki integration team.