Hi,

You can create Vendor Price Worksheets with the below.

URL: {YourSite}/entity/{EndpointName}/{EndpointVersion}/VendorPriceWorksheet

Method: PUT

Body: Demo Example

{
    "Description": {
        "value" : "Price from API"
    },
    "VendorSalesPrices":  
        {
            "Vendor": {
                "value": "AASERVICES"
            },
            "InventoryID": {
                "value": "AACOMPUT01"
            },
            "UOM": {
                "value": "EA"
            },
            "PendingPrice": {
                "value": 1.5
            }
        },
                {
            "Vendor": {
                "value": "ALPINEAIR"
            },
            "InventoryID": {
                "value": "CONAIRT1"
            },
            "UOM": {
                "value": "EA"
            },
            "PendingPrice": {
                "value": 1.5
            }
        }
    ]
}

To see the other fields you can access go to the Web Service Endpoints (SM207060) screen.

You can learn more about Api Integrations on Acumatica’s Open University.

https://openuni.acumatica.com/courses/integration/

I hope this helps!

Thank you! @yhartman