Retrieve PO via API from Ariba

Hi,

I am working as Supplier in the Ariba Supplier Network. I would like to integrate all my PO from my customers in a 3rd party system. I see two variants:

• PULL: my middleware sends requests to Ariba to retrieve PO
• PUSH: Ariba sends the PO to an specific endpoint

Are both variants possible within Ariba? I know I can do the PUSH, but is the PULL also possible?

Thanks & BR

Simon