An example system and method facilitates customization of and configuration of a software connector, such as a connector to an Application Programming Interface (API) or web service, in various types of computing environments, including both pre-deployment and post-deployment computing environments. A connectors framework provides a layer of abstraction between connectors maintained in the different environments and a connector editor of an application development system (which may be implemented via a server-side integrated development environment). The connector editor may provide User Interface (UI) functionality, including one or more UI controls for editing or otherwise modifying, customizing, and/or configuring connectors in pre-deployment and/or post deployment environments, which may represent or correspond to different connector and accompanying software development stages.