Not directly. In fact, it seems that javascript would have a hard time doing it too. However, if you have a server that you interact with using JS or GAS, PHP may be able to do it for you:
https://techtalkbook.com/file-upload-via-sftp-using-php/Some of the advanced services show PHP as one of the client libraries, so you just might be able to figure something out. It just won't be a "direct" solution; e.g., use GAS to load a file to a server, that server uses PHP to send the file to another server via SFTP, etc.
On Thursday, October 7, 2021 at 1:03:36 AM UTC-4 Laurie Nason wrote: