How to get the hashkey of AP Invoice via REST API within AI Agent Studio

Hi,

We are facing a strange issue when calling the /fscmRestApi/resources/11.13.18.05/invoices REST API.

While invoking the following request from postman we get a proper response in attachments.links, i.e. the hashkey

Request: GET /fscmRestApi/resources/11.13.18.05/invoices?q=InvoiceNumber= 'INVOICE-3'&expand=attachments&links=self

Correct Response Payload:

                "PostProcessingAction": null,

                "Category": "From Supplier",

                "Type": "File",

                "links": [

                    {

                        "rel": "self",

                        "href": "https://<oracle fusion link>:443/fscmRestApi/resources/11.13.18.05/invoices/134016/child/attachments/00020000000EACED00057708000110D9342360450000000EACED00057708000110D934236044",

                        "name": "attachments",

                        "kind": "item"

                    },

                    {

                        "rel": "enclosure",

                        "href": "https://<oracle fusion link>:443/fscmRestApi/resources/11.13.18.05/invoices/134016/child/attachments/00020000000EACED00057708000110D9342360450000000EACED00057708000110D934236044/enclosure/FileContents",

                        "name": "FileContents",

                        "kind": "other"