We recommend that our Exchange partners use Adobe Analytics 2.0 APIs to integrate with Adobe Analytics where possible because they authenticate via Adobe I/O and they use the latest version of the Adobe Analytics backend engine. The Exchange App Manager will soon have a nice integration with Adobe I/O which will make it simple for your customers to grant you the access you need. This documentation has more details on what you can and cannot do with Adobe Analytics 2.0 APIs.
The new API works differently from the old 1.4 Adobe Analytics API and it can sometimes be difficult to know the best way to construct your API calls to pull data from Adobe Analytics. However, because the 2.0 API powers the Analysis Workspace project, you can use Analysis Workspace in your sandbox—along with a handy debugger—to get to know the API better. By constructing the reports in the UI and then checking the debugger, you can see what API calls Analysis Workspace is making to construct the reports you’re seeing. This will help you learn how to craft requests and will allow you to explore the full power of the new Analytics API in a user-friendly environment. Here’s how to do it.
Using the trick from that link, you'll be able to see all of the API calls used to run Analysis Workspace. As a partner, you should have access to most of the API methods used by Analysis Workspace but not all: Some methods such as session keep-alive methods and other methods only make sense in the context of the Analysis Workspace product itself.
If you’re new to Analysis Workspace, run through this documentation to familiarize yourself with how it works. It might give you some ideas for creative ways you can organize and pull data to enhance your integration.