I run an e-retail business and sell on Amazon.com and other marketplaces.  Currently I run most of the business using Excel.  I make updates to Amazon using CSV file imports from Excel, and also receive Amazon reports as CSV files.  All my sales analysis, forecasting, P&L etc. is also done in Excel, driven by this data.  As this involves a lot of repetitive manual work to import/export data, I'm considering moving to a database-driven system and am considering using Creator.

I'd like to use the Amazon MWS API to make and receive updates with Amazon.  I was wondering if anyone has achieved this with Creator?  I'm aware of Zoho Inventory which links into Amazon, but this doesn't really meet a number of my additional needs.

From the research that I've done, MWS is a REST-based API, and uses XML, both of which seem to be supported by Creator.  However, messages must be signed with an RFC 2104-compliant HMAC which needs to be calculated for each message.  Can this be done natively in Creator?  Or would I need to call a remote service to calculate the HMAC?

Thanks