patch
https://a.klaviyo.com/api/folders//relationships/children
This endpoint is in beta and subject to change.
A beta revision header (2026-10-15.pre) is required to use our beta APIs. Klaviyo APIs in beta are not intended for use in production. See our versioning and deprecation policy for more information.
Bulk re-parent: move every listed folder ID onto pk atomically.
Rate limits:
Burst: 3/s
Steady: 60/m
Scopes:
folders:write
Success