From what I can see you just need to do a GET request to
/api/v1/stats/app?api_key=XXXXXX
Where XXXXX is the api key of the app you want to get the params for. This call will return a json wit the following information:
stats = {
:name => @app.name,
:last_error_time => @last_error_time,
:unresolved_errors => @app.unresolved_count
}
If you need more information you can always modify the file: /app/controllers/api/v1/stats_controller.rb to include the relevant information