Per-platform settings.__type on create post.

Provider settings

On each posts[] item, settings may include __type matching the channel provider.

Provider__typeNotes
FacebookfacebookOptional fields as supported by worker
InstagraminstagramFB-linked or standalone channels
Threadsthreads
TikToktiktok
LinkedInlinkedinConnect supported; publishing may be limited
PinterestpinterestRequires boardId or board for schedule/now; optional title, link
Xx
YouTubeyoutube
Google Businessgmb / google_business / google-business

Pinterest example

{
  "type": "schedule",
  "date": "2026-09-20T10:00:00.000Z",
  "posts": [{
    "channelId": "…",
    "content": "New pin",
    "mediaIds": ["…"],
    "settings": {
      "__type": "pinterest",
      "boardId": "BOARD_ID",
      "title": "Pin title",
      "link": "https://example.com"
    }
  }]
}

__type must match the connected channel's provider or the API returns 400.