For questions referring to an Application Programming Interface (API) that performs or used to support Operations Research or OR-related functions. Do not use this tag for a general problem with a non-OR related API.

Application Programming Interface (API)
An API is a set of rules, procedures, or functions that enable interaction with an external user, application, operating system, or other services.

APIs are commonly used to permit the use of particular software libraries or to access data stories in a repository.

For more info, see the API wiki page.