How to do the candidate background screening integration with Non third party vendor

We are trying to integrate the candidate backgroud screening with a vendor who is not listed in the Oracle market place. So we are plannig to do the integration. steps we are going to approach
1. Share the candidate details By using fusion REST api to the vendor API.

2. create a custom EFF fied (status and comments) on the Jop application level .

3. Update the status and comments based on the response from the vendor.

first we were trying to update the screening result directly on fusion. but the rest api is not supported. then we have created a custom EFF to capture the status and other details.