A contact is considered as parties involved in your marketplace. You should create contacts to before with any other APIs in the list. You will be able to tag your contacts as 'Vendor' or 'Customer' based on your requirement. For every contact you create, a VPA handle and virtual account number is generated if in case you want to collect payments for a contact and identify transaction coming in for that contact. You can create multiple contacts in a single go.
Click Try It! to start a request and see the response here!