In order to classify a phrase, you must first train your classification model with "training phrases". Training phrases are grouped by QnAs and Intents. The following API specification will allow you to manage the content (QnAs and Intents) in your trainer.
Make sure to include the correct authorization headers: App-Id and App-Key, which can be found in your trainer in the section App settings. For PUT and POST requests the Content-Type header must be “application/json”.