Hi, to be honest - the API seems a little bit too complicated for using it in small, non-commercial software projects. It would be much easier just to send a mail from the user's mail client to shapeways, which contains the created stl file as attachment and a standard text. Minutes later the user could then receive a reply mail with a link to his uploaded object and then decide if he wants to create an account or sign in if he already has one. No need for consumer keys, developer authentication etc. Of course this wouldn't be an option for business owners, but an interesting alternative for hobby developers. best regards, Hendrik