OptionalcompletedTrue/false boolean indicating whether the Checklist Item is completed. Defaults to false.
The Checklist Item description.
Optionalexternal_This field can be set to another unique ID. In the case that the Checklist Item has been imported from another tool, the ID in the other tool can be indicated here.
Optionalset_One of "first", "last", "before", or "after". This can be used to move the Checklist Item to the first or last position in the Story's checklist, or before or after a given Checklist Item.
Request parameters for creating a Checklist Item on a Story.