Any public API to accept an image with a UPC barcode and return product code?

Could anyone please suggest me of any public API (free or otherwise) which can accept some binary image having upc barcode and return me the underlying product code therein?

I wish to consume one fr开发者_如何学编程om within a .net application + smartphone applications e.g. iPhone, Android etc.

(I know it's an old question, but just saw it:)

You can upload images to http://zxing.org/w/decode.jspx (or programmatically post to the same URLs that this web form does). This is a service we (I) run for free as a benefit for the public, so please don't flood it with requests.

If you like it and want to send a load of requests, you can run your own instance of it. The full source code is available at http://code.google.com/p/zxing; see the zxingorg/ folder.