AP Bill Payment REST API

@AndrewMuzalov Do you already have the Bill #TEST002 in the system when you are trying to insert a payment for it? Is it also in “Released”/”Open” status at the moment of Payment creation?

Yes. It is already added to Acumatica and with “Open” status. I can add payment to it manually from Acumatica UI.
Here the screenshot with my test bill:

Now it is more complicated, because invoicece with multiple lines. From Acumatica UI I can add payment to every line, and use particual amount

And an additioanl screenshot from fidler with data what I’m trying to send. Here I added row number like on UI

This screenshot with manual creation from ACE to second line 15$ for line with 90$

Any ideas how I can import AP Payments to Acumatica. May I should use another web endpoit for it?

Than

{
    "Vendor": {
        "value": "AAVENDOR"
    },
    "PaymentMethod": {
        "value": "CHECK"
    },
    "CashAccount": {
        "value": "10200"
    },
    "Description": {
        "value": "Test"
    },
    "Details": [
        {
            "AmountPaid": {
                "value": 5.0
            },
            "DocType": {
                "value": "Bill"
            },
            "ReferenceNbr": {
                "value": "005379"
            }, 

            "DocLineNbr": {
                "value": "1"
            }
        }
    ],
    "PaymentAmount": {
        "value": 5.0
    },
    "PaymentRef": {
        "value": "Test002"
    },
    "Type": {
        "value": "Payment"
    }
}

Thanks! It works - this field was missed in my API, I extended it - and it works!