Abstract: Examples are generally directed towards disabling features using a feature toggle associated with an application programming interface (API). A server receives an API request including one or more elements. An element is associated with a set of features. If a feature state of every feature within the set of features is an enabled feature state, the element state is an enabled element state and the request is validated. The validated request is executed and a response to the request is returned to the client. If at least one feature state of at least one feature within the set of features is a disabled feature state or a hidden feature state, the element state is a disabled element state and the request is invalided. The invalidated request is rejected and an error message is returned to the client.