How to change product quantity using the Ebay API

There are three options for updating your current item on eBay.

• ReviseItem
• ReviseFixedPriceItem
• ReviseInventoryStatus

You can use ReviseInventoryStatus to quickly update the cardinality as it has some advantages over others.

• Up to a maximum of 4 items can be updated in one call.
• Updated quantity confirmation is included in the response .

If you're okay using Composer in your PHP projects, I've developed an SDK that makes it easy to use the eBay API. The example below shows how to use the SDK using ReviseInventoryStatus. Comments in your code should tell you what you need to change for it to work.

<?php
require 'vendor/autoload.php';

use \DTS\eBaySDK\Constants;
use \DTS\eBaySDK\Trading\Services;
use \DTS\eBaySDK\Trading\Types;
use \DTS\eBaySDK\Trading\Enums;

// Your authorization token associated with the seller account.
$authToken = 'abcd123';
// The ID of the item you wish to update (Must be a string).
$itemID = '123456789';
// The new quantity (Must be an integer and not a string!).
$quantity = 20;
// The numerical ID of the site that the item was listed on. For example the site ID for ebay.com is 0 and for ebay.co.uk it is 3. A complete list is available from eBay: http://developer.ebay.com/DevZone/XML/docs/Reference/ebay/types/SiteCodeType.html.
$siteID = '0';

$service = new Services\TradingService(array(
    'authToken' => $authToken,
    'apiVersion' => '899',
    'siteId' => $siteID
));

$request = new Types\ReviseInventoryStatusRequestType();
$inventoryStatus = new Types\InventoryStatusType();
$inventoryStatus->ItemID = $itemID;
$inventoryStatus->Quantity = $quantity;
$request->InventoryStatus[] = $inventoryStatus;
$request->ErrorLanguage = 'en_US';
$request->WarningLevel = 'High';

$response = $service->reviseInventoryStatus($request);

if (isset($response->Errors)) {
    foreach ($response->Errors as $error) {
        printf("%s: %s\n%s\n\n",
            $error->SeverityCode === Enums\SeverityCodeType::C_ERROR ? 'Error' : 'Warning',
            $error->ShortMessage,
            $error->LongMessage
        );
    }
}

if ($response->Ack !== 'Failure') {
    foreach ($response->InventoryStatus as $inventoryStatus) {
        printf("Quantity for [%s] is %s\n\n",
            $inventoryStatus->ItemID,
            $inventoryStatus->Quantity
        );
    }
}

      

        
        
        
      

    

If you are interested in updating other aspects of an element, such as Title, you will need to use any of the Revise operations as they are designed to update more fields.

<?php
require 'vendor/autoload.php';

use \DTS\eBaySDK\Constants;
use \DTS\eBaySDK\Trading\Services;
use \DTS\eBaySDK\Trading\Types;
use \DTS\eBaySDK\Trading\Enums;

// Your authorization token associated with the seller account.
$authToken = 'abcd123';
// The ID of the item you wish to update (Must be a string).
$itemID = '123456789';
// The new quantity (Must be an integer and not a string!).
$quantity = 20;
// The numerical ID of the site that the item was listed on. For example the site ID for ebay.com is 0 and for ebay.co.uk it is 3. A complete list is available from eBay: http://developer.ebay.com/DevZone/XML/docs/Reference/ebay/types/SiteCodeType.html.
$siteID = '0';

$service = new Services\TradingService(array(
    'authToken' => $authToken,
    'apiVersion' => '899',
    'siteId' => $siteID
));

$request = new Types\ReviseItemRequestType();
$item = new Types\ItemType();
$item->ItemID = $itemID;
$item->Quantity = $quantity;
$request->Item = $item;
$request->ErrorLanguage = 'en_US';
$request->WarningLevel = 'High';

$response = $service->reviseItem($request);

if (isset($response->Errors)) {
    foreach ($response->Errors as $error) {
        printf("%s: %s\n%s\n\n",
            $error->SeverityCode === Enums\SeverityCodeType::C_ERROR ? 'Error' : 'Warning',
            $error->ShortMessage,
            $error->LongMessage
        );
    }
}

if ($response->Ack !== 'Failure') {
    printf("Quantity for [%s] has been updated\n\n", $itemID);
}