Another great feature Web API team has provided support for Server side paging and $inlineCount is called oDataResult<T>
It is really easy to achieve this. Earlier you could return the data but you will have to rely on other mechanisms to achieve $inlineCount.
Step1: Change your return type of the controller action to oDataResult<T>.
Assuming your resource is available at
Step2: Execute the request.
Now you can get the count and a navigation path both.