Hi Everyone
Thanks
Mohamed Sithik
You can't "Add/Remove" columns on Standard API's since they need to match the DS (Data Structure) of the API Definition itself.
This works the same for Custom API's, but at least you have control over the DS on these and can decide in your Mod what Columns you need.
In regards to your Custom API showing up as REST API's, you need to create a separate API Endpoint for these, since they are not adding automatically to your Standard API's!These are the Standard Documents from Infor about this.