[SOLVED] Walmart MX Marketplace Acknowledge Order API Issue

Issue

I am working on Walmart integration to my own web application using PHP. When I tried to acknowledge my Mexico orders, I got an empty response. The data type of response is string with 0 length, error code 400. It looks like my credentials are good. Is "https://marketplace.walmartapis.com/v3/orders/{PurchaseOrderId}/acknowledge" a valid API url?

$url="https://marketplace.walmartapis.com/v3/orders/P108915403/acknowledge";
$ch      = curl_init();
$qos     = uniqid();
$options = array(
    CURLOPT_URL            => $url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT        => 60,
    CURLOPT_HEADER         => false,
    CURLOPT_POST           =>1,
    CURLOPT_HTTPHEADER     => array(
        "WM_SVC.NAME: Walmart Marketplace",
        "WM_QOS.CORRELATION_ID: $qos",
        "Authorization: Basic $authorization",
        "WM_SEC.ACCESS_TOKEN:$token",
        "Accept: application/json",
        "Content-Type: application/json",
        "WM_MARKET: mx",
    ),
);
curl_setopt_array($ch, $options);
$response = curl_exec($ch);
var_dump($response);

Code Snippet

Solution

After putting it aside for a few months, today I picked it up and finally got it resolved luckily and got a 202 Accepted Response with empty content(Walmart's documentation says the response to a successful call contains the acknowledged order, but it actually contains nothing except for 202 Accepted code).

When I tried to acknowledge my Mexico orders, the response is actually not empty. The header contains error message: http code 400 Bad Request. I confirmed that it is due to wrong payload structure after testing. So "https://marketplace.walmartapis.com/v3/orders/{PurchaseOrderId}/acknowledge" is a valid API URL and is the same as US API. The difference between them is that MX site needs a well-structured payload through POST while US site does not(US API only needs an empty payload through POST).

The key point to a successful call is the structure of the payload. The structure should be like the samples in the documentation.

Pay attention to the details of the structure. Refer to the picture for the structure of payload here. The "orderLine" and "orderLineStatus" should be declared as ARRAY instead of single element. And this is the reason why I failed to call the acknowledge API before.

Answered By - jacobontheway

Answer Checked By - Marie Seifert (WPSolving Admin)