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POST
Links each item to the task. An item the task already links is left unchanged; use Update Link to change its role or context. Returns the updated task. Each item takes these fields. Ids are prefixless, as everywhere in this API. An item you cannot read is a 400, the same as an item that does not exist. role and context added 2026-10-13. Each item must exist and be one you can open. Everyone on the task sees a link’s title, so a missing or unreadable item is refused with a 400, and nothing is linked.

Body parameters

array
required
The items to link. At least one.