Add Labels

Add Labels adds one or more labels without changing the card’s other labels.

Inputs

Input	Type	Required	Description
Third-party account	Trello account	Yes	An account with write access to the card.
Card ID or URL	String	Yes	A card ID, short link, or complete card URL.
Labels	List of strings	Yes	Label IDs, names, or colors. Matching is case-insensitive.

Output	Type	Description
Card	Object	The card after its labels are added.
Card ID	String	The updated card’s ID.

Label IDs take precedence over names, and names take precedence over colors. Duplicate references are applied only once.

A color or name that matches multiple labels is ambiguous. Use a label ID to identify the intended label.