Merchant Fulfillment v0 - getEligibleShipmentServices - InvalidInput

[Ahmed-Sajjad]

I'm getting the InvalidInput error when trying to get data from the getEligibleShipmentServices. My address is UK based and want to know what I'm doing wrong. Here is the JSON request payload

Request Payload

{
  "ShipmentRequestDetails": {
    "AmazonOrderId": "XXX-XXXXXXX-XXXXXXX",
    "ItemList": [
      {
        "OrderItemId": "XXXXXXXXXXXXXX",
        "Quantity": 1
      }
    ],
    "ShipFromAddress": {
      "Name": "XXXXXX XXXXXXXXXXXX XXXXXX",
      "AddressLine1": "XXXXXXX XXXXXX,",
      "AddressLine2": "Stockton-on-Tees,",
      "City": "Billingham",
      "StateOrProvinceCode": "County Durham",
      "Email": "XXXXXXXX.XXXXXXX@XXXXXX.XX.XX",
      "CountryCode": "GB",
      "PostalCode": "XXXX XXX",
      "Phone": "XXX XXXX XXXX"
    },
    "PackageDimensions": {
      "Length": 0.001,
      "Width": 0.001,
      "Height": 0.001,
      "Unit": "inches"
    },
    "Weight": {
      "Value": 0.001,
      "Unit": "g"
    },
    "ShippingServiceOptions": {
      "DeliveryExperience": "DeliveryConfirmationWithoutSignature",
      "CarrierWillPickUp": true,
      "LabelFormat": "PNG"
    }
  }
}

Response JSON

{
    "errors": [
        {
            "code": "InvalidInput",
            "message": "Invalid Input",
            "details": ""
        }
    ]
}

Any help will be appreciated, Thanks