Running Multiple web calls from a single web query

hi everyone I wonder if anybody out there can help. I am making an api call in to our TFS server on prem that brings back a list off all work items (work item id) and their relevant urls what I need to do is make an individual web call for each item on the list automatically to get detailed info about each work item. The second query is more standard. http://xxxxxxxx.uk:8080/tfs/ManagedSystems/_apis/xxxxx/workItems/xxxxxx I've tried following this https://satalyst.com/power-query-creating-a-parameterized-function-in-m/ but I cant work out how to configure the initial api call I have to make to reflect the parameter I need ( the work item id. Are there any alternative ways to do this. Many thanks for your advice as ever

so in an update to this - this is the M im using to create the function - i dont know why but it wont give me any results when making the API call to TFS 

let workitems = (id as text) =>
 
let
    Source = Json.Document(Web.Contents("http://tfs.XXXXuk:XXXX/tfs/ManagedSystems/_apis/wit/workItems/"& id &"" )),
    workItems = Source[workItems],
    #"Converted to Table" = Table.FromList(workItems, Splitter.SplitByNothing(), null, null, ExtraValues.List),
    #"Extracted Values" = Table.TransformColumns(#"Converted to Table", {"Column2", each Text.Combine(List.Transform(_, Text.From)), type text}),
    #"Expanded Column1" = Table.ExpandRecordColumn(#"Extracted Values", "Column1", {"id", "url"}, {"Column1.id", "Column1.url"}),
    #"Removed Columns" = Table.RemoveColumns(#"Expanded Column1",{"Column2"})
in
    #"Removed Columns"
in workitems