Publish a member LinkedIn post (safety limit: 10/day; max 3000 chars), now or with schedule_at. Supports attachments. Co

The post content text (max 3000 chars)

ISO 8601 datetime to schedule the post for future publishing (e.g. '2026-03-10T09:00:00Z'). If omitted, post is published immediately.

Campaign slug (from list_campaigns) to track this action under.

NOT SUPPORTED. Publishing on behalf of a company page is not available, so passing this is refused and nothing is posted. Retained only so the refusal explains itself instead of returning an opaque error. Omit it to post as the member.

NOT SUPPORTED. Link preview payloads are refused and nothing is posted. Include the URL in the post text instead.