Development of data services can be enhanced through the use of methods and systems that automate aspects of the build process. Particularly, software can be used to automatically generate test cases and incorporate test results into documentation as part of the build process based on an updated Application Programming Interface (API) specification to generate up-to-date and accurate Software Development Kit (SDK) artifacts. A method can comprise accessing data defining an API for a data service, such as Web Application Description Language (WADL) or Web Service Description Language (WSDL) data. The method can further comprise identifying a test case for a service call that can be made via the API based on the data defining the API, and generating test code, the test code configured to evaluate the test case by making the service call. The test code can be used for evaluating the test case(s) in order to ensure requests and/or responses are consistent with the API definition.