Methods and systems for supporting the production of shipping labels are provided. Example embodiments provide a Shipment Management System ("SMS"), which facilitates the production of shipping labels. The SMS may be configured to generate a shipping uniform resource identifier ("URI") that identifies a shipping protocol and includes shipment information and post-back information. The shipping URI may be provided to a shipping label module configured to produce a shipping label in accordance with the shipping protocol by outputting a shipping label based on the shipment information, and automatically posting information about the producing of the shipping label to a code module identified by the post-back information. This abstract is provided to comply with rules requiring an abstract, and it is submitted with the intention that it will not be used to interpret or limit the scope or meaning of the claims.