Steps

Read the Inbound and Outbound OpenAPI 3.0 specs published at vendingmachineapi.com/api to scaffold clients/servers for both directions.
Before locking, call the machine-status (vmc_search) endpoint and verify connected/ready/busy fields to confirm the machine can accept a cashless session.
Call POST /api/lock to open a transaction session on the target machine.
Implement the outbound callback endpoints your service must expose, including /txn/request for the customer's on-machine selection.
Call POST /api/paid once your backend has approved payment so the platform instructs the machine to dispense.
Handle the /txn/vend (success/failure) or /txn/unlock (session-terminated-without-vend) callback and map returned codes to user-facing outcomes.

Known gotchas

SWAP NOTE: PayRange has no publicly discoverable API/developer documentation beyond a near-empty GitHub org — swapped to Vending on Track's Connectivity Platform, which publishes full OpenAPI 3.0 specs and an error-code reference.
/txn/vend and /txn/unlock are mutually exclusive per transaction — a physical dispense success/failure comes back via /txn/vend, while connection loss, timeouts, or non-dispense session closures come back via /txn/unlock, and some of the same MDB outcomes can appear under either depending on device firmware.
A machine can report connected: true but ready: false, meaning it is online but its VMC has cashless payment context disabled — locking in this state predictably fails (unlock code 11, Cardless Disabled), so check ready before calling /api/lock.

Connect an external system to Vendon Cloud's API to retrieve or push vending/coffee machine telemetry data.

Connect a vending machine's telemetry (cashless reader/ePort) to Cantaloupe Seed for real-time machine and sales monitoring.

cantaloupe.com · 5 steps · unrated

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Integrate a vending machine into a third-party app using Vending on Track's Connectivity Platform lock, vend, and payment-callback flow.

Steps

Known gotchas

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