Publish to Trello or Buffer Using Built-In API Connector Copy your Trello API key and token from https://trello.com/app-key and park them into cells B1:B2 of a new tab named Secrets. In A4 enter ="https://api.trello.com/1/cards?idList="&$D$1&"&key="&Secrets.B1&"&token="&Secrets.B2&"&name="&ENCODEURL(C4)&"&desc="&ENCODEURL(D4)&"&due="&TEXT(E4,"yyyy-mm-dd") where D1 holds the target list ID, C4 the post title, D4 the caption, and E4 the scheduled UTC date. Drag the formula down for every row