Leveraging the new API from Harvest you can embed a report in your WordPress admininstration for your customers.
To get your project ID go to your Harvest dashboard - “Manage”, and you’ll see your projects listed. When you open up one you’ll see a numerical value in the URL bar (e.g. yourname.harvestapp.com /projects/49691/). The value you want is 49691. Remember this is only meant for one project, as that was the business need I needed it to solve. Also, if you want to limit the end date on the report I have included that, but leave it blank to retrieve data up to the second.