Can Spark Shipping update tracking from a URL (Dropbox file or a Google spreadsheet)?

Yes! Spark Shipping can use HTTP GET method to update the tracking info of your orders from Dropbox, Google Spreadsheets or other direct links.

Go to your vendor page> For built-in vendors go to Advanced and for custom vendors go to Overview> Add Tracking File.
Set the Tracking File method to HTTP and the response format to the file type that is sent by the vendor (most common is csv or xlsx)
Set HTTP Type to GET
Enter the DIRECT link to the tracking file. Learn more about Direct Link in these articles: