Hivewallet:

You might try contacting https://coinplorer.com at contact@coinplorer.uservoice.com.  They run the most feature-rich block explorer for Primecoin that I'm aware of, although I don't know that they provide an API.  You might be able to work with them to get the interface you need. 

If that isn't possible then the community might be able to throw together a server that can handle the API calls you need.  I moderate the Primecoin subreddit and would be willing to help promote a search on that forum for a developer willing to put together such an interface.

You would also be well served looking around on ppcointalk.org, which serves as the main forum for discussion of both Primecoin and Peercoin.