Describing Inter Parameter Constraints in Web APIs Using Dependent Types

Web APIs are being used for increasingly larger and complex use cases. Right now it can be hard to make sure that what is documented about an API is correct everywhere and to know if a change will have impact on the users of a web API. When details are missing in an API specification users of that API need to make assumptions about how the API...

Automatically Identifying Parameter Constraints for Complex Web APIs: A Case Study at Adyen

Web APIs can have constraints on parameters, such that not all parameters are either always required or always optional. Sometimes the presence or value of one parameter could cause another parameter to be required. Additionally, parameters could have restrictions on what kinds of values are valid. We refer to these as inter-parameter and single...

Determining the viability for consumers of autogenerated Software Development Kits for Web APIs

In this age of web APIs serving as the backbone of millions of services on the Internet, the developers aiming to make use of these existing services have to adapt to the developers providing these services. Whenever the services change, the users of the service have to change accordingly in order to keep using them. As the amount of third-party...

An Exploratory Study on Faults in Web API Integration

Nowadays, service-oriented architectures are more popular than ever, and more and more companies and organizations depend on services offered through Web APIs. The capabilities and complexity of Web APIs differ from service to service, and therefore the impact of API errors varies. API problem cases related to Adyen’s payment service were found...

Web API growing pains: Loosely coupled yet strongly tied

Web APIs provide a systematic and extensible approach for application-to-application interaction. Developers using web APIs are forced to accompany the API providers in their software evolution tasks. In order to understand the distress caused by this imposition on web API client developers we perform a semi-structured interview with six such...

Web API Growing Pains: Loosely Coupled yet Strongly Tied

Web APIs provide a systematic and extensible approach for application-toapplication interaction. Developers using web APIs are forced to accompany the API providers in their software evolution tasks. In order to understand the distress caused by this imposition on web API client developers we perform a semi-structured interview with six such...