"caponica/amazon-mws-complete": "dev-master"

 $client = new \MwsProductClient(/* args */);

use CaponicaAmazonMwsComplete\AmazonClient\MwsProductClient;

$mwsProductClientUsa = new MwsProductClient(
    'YOUR_ACCESS_KEY',
    'YOUR_SECRET_KEY',
    'YOUR_APP_NAME',
    'YOUR_APP_VERSION',
    [ 'ServiceURL' => 'https://mws.amazonservices.com/Products/2011-10-01' ]
);

$mwsResponse = $mwsProductClientUsa->getCompetitivePricingForASIN([
    'SellerId'          => 'YOUR_SELLER_ID',
    'MarketplaceId'     => 'MARKETPLACE_ID',
    'ASINList'          => array('ASIN' => 'YOUR_ASIN_SEARCH'),
]);
// ... do something with the response ...

use CaponicaAmazonMwsComplete\ClientPool\MwsClientPool;
use CaponicaAmazonMwsComplete\ClientPool\MwsClientPoolConfig;

$mwsClientPoolUsa = new MwsClientPool();
$mwsClientPoolUsa->setConfig([
    'amazon_site'           => MwsClientPoolConfig::SITE_US
    'access_key'            => 'YOUR_ACCESS_KEY'
    'secret_key'            => 'YOUR_SECRET_KEY'
    'application_name'      => 'YOUR_APP_NAME'
    'application_version'   => 'YOUR_APP_VERSION'
    'seller_id'             => 'YOUR_SELLER_ID'
]);

$productClientPackUsa = $mwsClientPoolUsa->getProductClientPack();
$mwsResponse = $productClientPackUsa->callGetCompetitivePricingForASIN('YOUR_ASIN_SEARCH');

/** @var MwsCompetitivePricing[] $compPricings */
$compPricings = $productClientPackUsa->retrieveCompetitivePricingForASIN('YOUR_ASIN_SEARCH');
foreach ($compPricings as $compPricing) {
    echo $compPricing->asin;
}

$reportFilePath = '/path/to/file.txt';
$reportType = MwsFeedAndReportClientPack::REPORT_FBA_INVENTORY_AFN;
$fileHandle = @fopen($reportFilePath, 'r');
if (!$fileHandle) {
    return "Could not open $reportFilePath to read the report from";
}

try {
    while (($lineFromFile = fgets($fileHandle)) !== false) {
        if (!$checkedHeader) {
            BaseMwsReport::validateHeaderRowForReportType($lineFromFile, $reportType);
            $reportRecordClass = BaseMwsReport::convertReportTypeToReportRecordClass($reportType);
            $checkedHeader = true;
            continue;
        }

        $reportRecord = new $reportRecordClass($lineFromFile);
        // do something with the record 
        echo "The SellerSku field value is" . $reportRecord->getSellerSku();
    }
} catch (InvalidReportHeaderException $e) {
    // Handle the exception, which is thrown if the header is not the expected format
} catch (InvalidReportRecordException $e) {
    // Handle the exception, which is thrown if the row is not the expected format
}