The SmartyStreets US Zip Code API supports the combination of city, state, and ZIP Code field entries in address lookup and verification queries for US locations. It can be used to append ZIP codes to incomplete addresses, pull up metadata regarding each ZIP Code etc.
Fourteen APIs have been added to the ProgrammableWeb directory in categories including Accounting, Banking, Mapping and Annotations. Highlights today include the Hypothes.is API for accessing a platform that aims to annotate the web, plus two Science APIs. Here's a rundown of the latest additions.