To use the "Get Orders" endpoint, you must include the following required parameters: seller_contract_id: The contract ID for the seller. order_reference: The order reference. status: The order status (e.g., PENDING). carrier: The carrier for the ...
The "WAITING_PAYMENT" status is related to the order processing cycle. However, as of now, the "WAITING_PAYMENT" status is not available in the Orders API (REST).
Please note that since last 30th June we don't give support to the XML API so we encourage you to migrate to the REST API as soon as possible if you still haven't done it. You can contact us for any question you may have for this process.