Import Contact List
Import a CSV from a client-supplied presigned S3 or public HTTPS URL. Returns immediately; poll GET /contact-lists/{id} for ready.
Authorizations
Authenticate every request by passing your API key in the X-API-Key header. Keys are scoped to your organization hierarchy.
Body
Target organization for the import. Defaults to the organization that owns the API key. Required only when targeting a sub-organization under an agency-tier parent; the API key must have access to the sub-organization (otherwise the request returns 403 ORG_ACCESS_DENIED).
Optional. When provided, the list is scoped to this brand and the brand's organization is used (must match organization_id if both are sent — otherwise returns 400 BRAND_ORG_MISMATCH).
Response
Import accepted (poll the contact list for ready status)
