How to get Amazon Seller Central orders programmatically?

AIM and SOAP are historical APIs. The best choice is MWS, which supports all features of AIM and SOAP (i.e. all listing activity, inventory reports, order reports, order acknowledgement and cancellations, refunds, settlement reports).MWS is also well documented at mws.amazon.com, and example client libraries are provided for Java, C# and PHP. For feed and report formats, you should refer to Seller Central Help pages for all formats (unless you are a Marketplace seller, in which case the help pages are accessible from your seller account page).

You may also want to peruse www.amazonservices.com

Finally, here's a link to the SOA-GuideToXML.pdf document, which describes the details of the XML feeds and reports, as well as the overall workflow:

http://g-ecx.images-amazon.com/images/G/01/rainier/help/tutorials/SOA-GuideToXML.pdf

I think Amazon's API is a confusing mess to deal with. I just wrote a simple tool to extract data from my Amazon wishlist and it was far harder than it should have been.

I would guess that you want to use the Marketplace service, but I could be wrong. If you're dealing with PHP, there is a PHP API that you might find helpful - Tarzan (link disabled - this package is apparently no longer available)

Here is a Amazon forum for that should help: http://www.amazonsellercommunity.com/forums/forum.jspa?forumID=32, and a PDF overview

If you (obviously not reffering to YOU) don't feel comfortable with web services and API calling (communication). You can download a flat file from Sellercentarl.amazon with your order information, and use an import method to enter the whole file at once, without retyping any info. Obviously the exact pricess would depend on What system you are trying to enter these orders into.Good Luck!