Deputy Enterprise and Deputy Pro (including 30 day trial) has Deputy Reports. Deputy reports are HTML5 apps which are executed in client browser!
Data is fetched via API as well as dedicated reports api executable in client side. You also have companion DeXML Script for the report that can perform complex server side operations.
In Deputy Enterprise, you can see full source code of the reports in Settings->Custom Development-> Report writer
Feel free to duplicate an existing report (Edit the report, Save->Duplicate) and modify it's source. Please note, you should not modify existing Deputy reports as they will be overwritten with our version upgrades.