BAPI for MMBE (or getting stocks)

Hello esperts,

ABAP is not speciality, I'm having difficulties finding a BAPI to get stocks like trx MMBE.. I need the BAPI to be consumed through a WebDynpro-Java App (this is my speciality), I hope any of you could give me some guidance where to find that BAPI and how to use it in general terms...

Thanks in advance.

JV