Platforms

Each connected network behaves differently — different formats, media limits, character counts, and engagement features. This section has one page per platform that gathers all of it in one place: publishing formats and parameters, media constraints, placements, what you can (and can’t) do with comments and direct messages, and which webhooks fire.

Platform	ID	Publishing formats	Page
Facebook	`facebook`	Feed post, Reel, Story	Facebook
Instagram	`instagram`	Feed post, Reel, Story	Instagram
Threads	`threads`	Feed post	Threads
X (Twitter)	`twitter`	Tweet, Poll	X (Twitter)
LinkedIn	`linkedin`	Feed post	LinkedIn
YouTube	`youtube`	Channel video	YouTube
TikTok	`tiktok`	Video, Images	TikTok
Pinterest	`pinterest`	Pin	Pinterest
Bluesky	`bluesky`	Feed post	Bluesky
Telegram	`telegram`	Channel post	Telegram
Google Business	`google_business`	Standard, Event, Offer, Photo	Google Business

Using platform parameters

A single post can target many networks at once. The shared post.body and media apply everywhere; per-network options go in the platforms object, keyed by platform ID:

{
  "post": {
    "body": "My post content"
  },
  "profiles": ["instagram", "youtube"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "instagram": {
      "format": "reel",
      "first_comment": "Link in bio!"
    },
    "youtube": {
      "title": "My Video Title",
      "privacy_status": "public"
    }
  }
}

Every parameter is documented on the platform’s own page. See the Posts API for the full request shape.

Character limits

Platform	Limit	Notes
Facebook	63,206	2,200 for Reels
Instagram	2,200	Stories have no caption
Threads	500
X (Twitter)	280 / 25,000	280 on free accounts, 25,000 on paid. Polls are always capped at 280
LinkedIn	3,000
YouTube	5,000	Description. Title is capped at 100
TikTok	2,200
Pinterest	500	Description. Title is capped at 100
Bluesky	300	Counted in graphemes
Telegram	4,096
Google Business	1,500	Photo format has no body

Media limits

Maximums for a single post. Per-format differences (Stories, Reels, etc.) are on each platform page.

Platform	Images	Image max	Video max	Video length	Documents
Facebook	10	10 MB	4 GB	up to 4 h	—
Instagram	10	8 MB	300 MB	3 s – 60 min	—
Threads	20	8 MB	1 GB	up to 5 min	—
X (Twitter)	4	5 MB	512 MB	1 – 140 s	—
LinkedIn	20	8 MB	5 GB	up to 15 min	1 (100 MB)
YouTube	—	—	256 GB	no limit	—
TikTok	35	20 MB	4 GB	3 s – 10 min	—
Pinterest	1	32 MB	2 GB	4 s – 15 min	—
Bluesky	4	1 MB	50 MB	1 – 60 s	—
Telegram	10	10 MB	50 MB	—	1 (50 MB)
Google Business	1	5 MB	—	—	—

Engagement & delivery

What’s available beyond publishing. “Threads” here means native multi-post chains (a thread/conversation), not the Threads network.

Platform	Comments	Direct messages	Post chains	Placements
Facebook	Full (list, reply, delete, hide, like)	Yes	—	Pages
Instagram	List, reply, delete, hide	Yes	—	—
Threads	List, reply, hide	—	Yes	—
X (Twitter)	—	—	Yes	—
LinkedIn	Coming soon	—	—	Profile + organizations
YouTube	Coming soon	—	—	—
TikTok	—	—	—	—
Pinterest	—	—	—	Boards
Bluesky	—	Yes (text only)	Yes	—
Telegram	—	Yes	—	Channels
Google Business	Reviews (via Profile Comments)	—	—	Locations

Comment actions vary per platform — see the Comments API support matrix. Direct messages are detailed in the Direct Messages API.

Cross-platform posting tips

Text-only posts

Supported on X, LinkedIn, Facebook, Threads, Bluesky, Telegram, and Google Business. Instagram, TikTok, YouTube, and Pinterest require media.

{
  "post": {
    "body": "Exciting announcement coming soon!"
  },
  "profiles": ["twitter", "linkedin", "threads"]
}

Image carousel

Supported on Instagram, Facebook, X (up to 4), LinkedIn (up to 20), Threads (up to 20), Telegram (up to 10), and Bluesky (up to 4).

{
  "post": {
    "body": "Check out these photos!"
  },
  "profiles": ["instagram", "facebook"],
  "media": [
    "https://example.com/photo1.jpg",
    "https://example.com/photo2.jpg",
    "https://example.com/photo3.jpg"
  ]
}

Video content

When posting the same video to multiple platforms, use platform-specific parameters:

{
  "post": {
    "body": "New video is live!"
  },
  "profiles": ["youtube", "tiktok", "instagram"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "youtube": {
      "title": "Tutorial: Getting Started",
      "privacy_status": "public"
    },
    "tiktok": {
      "privacy_status": "PUBLIC_TO_EVERYONE"
    },
    "instagram": {
      "format": "reel"
    }
  }
}

Post chains (threads)

Supported on X, Threads, and Bluesky. Pass a thread array of follow-up posts:

{
  "post": {
    "body": "1/ Here is a thread about our launch"
  },
  "profiles": ["twitter", "threads"],
  "thread": [
    {
      "body": "2/ First, we built the foundation...",
      "media": ["https://example.com/screenshot.jpg"]
    },
    { "body": "3/ Then we added the features..." },
    { "body": "4/ Check it out at example.com" }
  ]
}

Thread children can include their own media arrays. See the Threads section in the Posts API for full details.

Validation errors

The API validates media against each platform’s constraints before publishing. Common errors:

Error	Cause
”Media is required for feed post on Instagram”	Instagram posts need at least one image or video
”Too many images for Feed post on Twitter (max: 4)“	X allows at most 4 images
”Content is not allowed for story on Instagram”	Stories don’t support text content
”Cannot mix video and image for feed post on Facebook”	Some platforms don’t allow mixed media
”Documents are not supported for feed post on Twitter”	The platform doesn’t support document uploads
”Too many documents for Feed post on LinkedIn (max: 1)“	LinkedIn allows at most 1 document per post
”Cannot mix documents with images or videos for feed post on LinkedIn”	Documents must be posted on their own