lets see if we can get the data using something as simple as vbscript
if you are on a Windows machine, copy the following to a text file and rename is to what ever you want, test.vbs as an example. then run the vbscript via command line
Obviosuly change the sNet and xAPIKey variables
cscript <name of vbs file>
'start of code
sUrl = "https://api.meraki.com/api/v1/networks/" & sNet & "/clients?timespan=300&recentDeviceConnections[]=Wireless&statuses[]=Online&perPage=2000"
set http=createObject("Microsoft.XMLHTTP")
http.open "GET",sUrl,false
http.setRequestHeader "Content-Type","application/json"
http.setRequestHeader "Accept","application/json"
http.setRequestHeader "X-Cisco-Meraki-API-Key",xAPIKey
http.send
responseText=http.responseText
wscript.echo http.Status
If http.Status = 200 Then
wscript.echo responseText
else
wscript.echo "Error With The API Call " & http.status
end if
'end of code