I've changed the search criteria to BlobNamePattern  field it as attached, and still not getting anything.
 

Currently if I use this code works, but not the above API setup!?

set file="/Persistent/Credentials"
        set endpoint="https://s3.amazonaws.com" 
        s tStatus=""

      d res.DownloadBlobToFile("MTCbucket","MTC_88667","/archive/MTC_88667_archiced.json")
       

Thanks.

I though maybe you can create a Role for that user and restrict the webpage to only be accessed by that role!?