Datenzugriff per VBA-Code (Excel, Access, Word).

Function GetData(url As String) As String
    Dim http As Object
    Set http = CreateObject("MSXML2.XMLHTTP")
 
    http.Open "GET", url, False
    http.send
 
    GetData = http.responseText
End Function

Sub TestGateway()
    Dim json As String
    json = GetData("http://localhost:5000/api/v1/dsn/demo/tables")
    Debug.Print json
End Sub

Für JSON-Parsing empfohlen: VBA-JSON Library

Dim data As Object
Set data = JsonConverter.ParseJson(json)