development api

my zigbee model XBP24-ZB.

i have two router and 1 coordinator, the coordinator receive data connected in my computer.
I need to develop a service that monitors the data received to make an entry in the database.

any development API or any open source serial monitor??

I am not sure I understand what it is you are looking for. The XBee modules by default are a transparent wireless cable. All you should need to do is to open a COM port to which the XBee module is connected to and receive the data as it is sent just like a wired connection.