Hi,  There are two options available - Assets HTTP APIs- Open API based APIs and Events for Assets  Please refer to   Assets HTTP APIs available for AEMaaCS and AEM 6.5 to know more about the available end points AEM 6.5 - https://experienceleague.adobe.com/docs/experience-manager-65/content/assets/...

BPA could be downloaded as AEM Package from Software Distribution Portal  https://experience.adobe.com/#/downloads/content/software-distribution/en/aemcloud.html