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POAmazon MWS Scratchpad API
 

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  1. POAmazon MWS Scratchpad API
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    <p>I am trying to get Amazon MWS Scratchpad working, but it keeps giving me a message:</p> <blockquote> <p>The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.</p> </blockquote> <p>I was looking for similar topic out here, but nothing really helpful. So, here is code:</p> <pre><code>$params = array( 'AWSAccessKeyId' =&gt; AWS_ACCESS_KEY_ID, 'Action' =&gt; "GetLowestOfferListingsForASIN", 'SellerId' =&gt; MERCHANT_ID, 'SignatureMethod' =&gt; "HmacSHA256", 'SignatureVersion' =&gt; "2", 'Timestamp' =&gt; gmdate("Y-m-d\TH:i:s\Z", time()), 'Version' =&gt; "2011-10-01", 'MarketplaceId' =&gt; MARKETPLACE_ID, 'ItemCondition' =&gt; "new", 'ASINList.ASIN.1' =&gt; "B001T6OP32"); $url = array(); foreach($params as $key =&gt; $val){ $val = str_replace('%7E', '~', rawurlencode($val)); $url[] = $key . '=' . $val; } $uri = implode('&amp;', $url); $string_to_sign = 'POST'; $string_to_sign .= "\n"; $string_to_sign .= 'mws.amazonservices.co.uk' . "\n"; $string_to_sign .= '/Products/2011-10-01' . "\n"; $string_to_sign .= $uri; $signature = hash_hmac("sha256", $string_to_sign, AWS_SECRET_ACCESS_KEY, TRUE); $signature = base64_encode($signature); $signature = urlencode($signature); $signature = str_replace("%7E", "~", $signature); $url = 'https://mws.amazonservices.co.uk/'; $url .= 'Products/2011-10-01' . '?' . $uri . "&amp;Signature=" . $signature; </code></pre> <p>I bet that problem is with Signature, when I'm printing it with <code>print $signature</code> it always contains <code>%</code> symbols, and when I'm comparing with <a href="https://mws.amazonservices.co.uk/scratchpad/index.html" rel="nofollow">Amazon Scratchpad</a> Request Details page, <code>SHA 256 HMAC</code> field - there is none.</p> <p>Maby there is something I can't see? I was checking for spaces in Secret Access Key, it's looks okay.</p> <p>Many Thanks.</p>
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    1. COJust a heads up for when you move past the signature portion. The scratch pad won't help you at all when you start testing your xml. You can type anything you want into the xml section of the scratch pad and it will tell you it is valid and give you a "200" response.
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