Yes most definitely. Within your developer tools, you can watch which API is being used when AEM triggers an action. With this information, you can copy the called API, adjust to your own hearts contempt, and then use it for your own purpose. Adobe has an easy tutorial on how you can extract APIs being used on AEM - https://helpx.adobe.com/experience-manager/6-3/sites/administering/using/curl.html#BuildingacURLRead...