I've found out that an API call can be used to purchase a Scheduled AWS Instance. I haven't come across a similar request to buy an On-Demand Instance, though. Is there a workaround, or was this particular call omitted on purpose?

CodePudding user response：

On-Demand instances are the default if you start a new instance, there is no need for separate purchasing as they will automatically be billed per hour/minute/second depending on the Operating System.