I hope you can help me. I have been trying to get this working for quite some time.
I am taking the API from a website import it into google spreadsheets VIA importj
File > Spreadsheet settings > Calculation > Recalculation: On change and every minute
Then you can insert a =now() column and it will refresh the sheet every minute.
Apologies if you've tried this already, I have it setup now in a sheet but am waiting for a live event to test, so it might not even work.