Windchill ESI Integration- Inventory from SAP

Dear Experts

We are using ESI TIBCO adapter for integrating Windchill with SAP. As per the documentation available, I understand that we can retrieve the following information from SAP into Windchill using the OOTB adapter

• Inventory information
• Part cost information
• Supplier information 

Could you please provide some inputs in terms what APIs need to be called to get thease information into Windchill

Thanks in anticipation

Rajesh