Get Status information, serial Port Data (API Mode)

I just got 2 “XB 24-B” Modules
Hardware-Version: 1941

1 works as Coordinator API
and the other one as Router AT

The first Question is, how can i get the status information from the Inputs (high/low)?
I was able to set the Output PINS with an explanation i found in the Data sheet, but can’t find the API CODE for the status information from the Inputs.

The other question is, if the Coordinator works in API mode, am i still able to send/request Data on the serial Port?