Check the Status

To check the status you need to read the Smart Transaction:

GET /api/v2/Smart/Transactions/STX_33PXAW2YN2NJTPM5KPGMK7QF5PBVA2 HTTP/1.1
Authorization: Bearer qb56tjj1bcvo9n2nj4u38k84lo
Accept: application/json

If everything is fine, the API responds with 200 OK: and the object representation:

HTTP/1.1 200 OK
Content-Type: application/json
    "object": "smart.transactions",
    // ...
    "transactions": [
            "object": "payment.transactions",
            "id": "PCI_FDBREW9ZS7P6FTN4ZY2ATC6NK0QWO7"
    "created": "2020-03-27T10:55:23+01:00",
    "updated": "2020-03-27T10:56:41+01:00",
    "status": "ok",
    // ...

The status of the Smart Transaction will be ok (intent sale), received (intent order and shipping), or collection (intent order and collection). If you have to wait for the payment before you deliver, the status is pending. This can happen with advance payment (prepaid) and occassionally with SEPA direct debit.