I keep failing to connect to a specific sftp

Don't think there is. Which os? I'm using Visual Studio Code with the go extension (golang.go), and really happy with that. Here's some pointers to rclone-specific configuration I use:

Edit: And to debug specific commands, add arguments to rclone like this in launch.json:

"args": [
    "serve", "http", "C:\\Temp", "-vv"
]