Enter this GeneratedReportId into the API GetReport to initiate the download of your report file. If the report is ready to be downloaded, its status response will be “_DONE_”, and the response will contain a GeneratedReportId. This API will ask for your report ID (or ID’s – if you are requesting multiple reports) to check on the status. A call is made to the API GetReportRequestList. Once you have your ReportRequestID, the fetching of the requested report is a two-step process. Take note of this ID, as it will be used to check the status of the report and you will ultimately download it when it is ready. A successful call of RequestReport will generate a response that contains a ReportRequestId. The RequestReport call initiates a request for a specific ReportType (depending on the report, you may have the option to pull a subset of the data with filters like StartDate, EndDate, MarketPlaceID, and more). Many API’s are available for managing the reports, but the process of requesting a report and then retrieving it from the service can be simplified down to three particular API calls (see requesting a Report Flowchart): Once you access the MWS, a wide variety of report types are available by on-demand generation or scheduling (see list of available Report Types). The client library (thankfully) handles the building of properly formatted requests, so the tokens need only be passed to the various classes upon their instantiation or setup. Specifically, a seller will need an Access Key ID, a Secret Access Key, and their Amazon Merchant ID in order to communicate with the MWS. To use the Amazon Marketplace Web Service, sellers go through a registration process that generates certain “tokens” that are required for access. During a recent project, we found it cleaner to take the library (the C# version) and compile it into a DLL ( Dynamic Link Library) so it could be included in future projects.Īccessing the Amazon Marketplace Web Service The library is available in several different development languages, including C#, PHP, and Java, and is ready to be used as is. In this article, we’re going to walk through how to start using MWS and the basic functionality for accessing reporting.īefore we start, we want to mention that programmatically using this service is something that can be done quite easily, as Amazon provides an open source client library for interacting with their MWS. Amazon MWS provides robust functionality for generating a wide variety of reports that will help you make decisions (among other features like inventory and order management). If you sell products via Amazon and are interested in using data to improve your business, then look no further than Amazon Marketplace Web Service (MWS). $signature = urlencode(base64_encode($signature)) $signature = hash_hmac("sha256", $sign, AWS_SECRET_ACCESS_KEY, true) $param = 'GetLowestOfferListingsForASIN' Maby there is something I can't see? I was checking for spaces in Secret Access Key, it's looks okay. I bet that problem is with Signature, when I'm printing it with print $signature it always contains % symbols, and when I'm comparing with Amazon Scratchpad Request Details page, SHA 256 HMAC field - there is none. $signature = str_replace("%7E", "~", $signature) $signature = hash_hmac("sha256", $string_to_sign, AWS_SECRET_ACCESS_KEY, TRUE) 'Action' => "GetLowestOfferListingsForASIN", I was looking for similar topic out here, but nothing really helpful. Consult the service documentation for details. Check your AWS Secret Access Key and signing method. The request signature we calculated does not match the signature you provided. I am trying to get Amazon MWS Scratchpad working, but it keeps giving me a message:
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