NEW FIELD CREATED – HOW TO ADD IT IN A MASTER DATA OR SHARE THE API?

Hi!

I created a new field at the customer card, but our BC is connected to an app called “Abakion” that links our BC to our B2B portal webpage. We would like our customers to see this new field I created, but the developer of Abakion told us they cannot access this field because it’s a customization.

Is there any way to put this new field in any Master Data or share the API to the developer so they can add it to their app?

Thanks!