Platform Support
Which platforms FeedHorizon publishes to, what each one accepts, and how accounts connect.
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Supported platforms
| Platform | API id | Text | Files per post | File types | Max file size | Status |
|---|---|---|---|---|---|---|
| X (Twitter) | twitter | 280 | up to 4 files, or none | JPEG, PNG, GIF; MP4 | — | Live |
linkedin | 3,000 | 1 file, or none | JPEG, PNG, GIF; MP4; PDF | — | Live | |
instagram | 2,200 | 1 to 10 files, required | JPEG, PNG; MP4 | — | Live | |
| Bluesky | bluesky | 300 | up to 4 files, or none | JPEG, PNG, WebP, GIF | 1 MB | Live |
pinterest | 500 | 1 to 5 files, required | JPEG, PNG, WebP | 20 MB | Live | |
| TikTok | tiktok | 2,200 | 1 file, a video is required | MP4, MOV, WebM | — | Beta |
Planned: Facebook, YouTube, Threads.
LinkedIn posts go to personal profiles; company pages are planned. TikTok is in beta: until TikTok has approved FeedHorizon, videos can only be posted as private (SELF_ONLY). Facebook, Threads and YouTube already show up in GET /api/v1/platforms with available: false until they launch.
GET /api/v1/platforms returns the same limits as JSON, straight from the rules the API checks posts against. This table is generated from them too.
How multi-platform posting works
When you create a post for several accounts, FeedHorizon:
- Checks the content against each platform's rules before storing anything
- Publishes to each account independently
- Tracks success and failure per account
- Returns one entry in
targetsper account, with its own status, native post id and URL
{
"data": {
"id": "post_9b2f4c1e6a3d4e8b9f0a1c2d3e4f5a6b",
"status": "published",
"targets": [
{
"platform": "linkedin",
"status": "published",
"platformPostId": "urn:li:share:7654321",
"platformUrl": "https://www.linkedin.com/feed/update/urn:li:share:7654321"
}
]
}
}Connecting accounts
Accounts are connected by the account owner, never with a password through the API:
- In the dashboard: open Connections, pick a profile and click Connect for the platform.
- With a connect link: create one with
POST /api/v1/platform-invites(or the MCP toolcreate_connect_link) and send it to your client. See Connect links.
Bluesky uses an app password instead of an OAuth redirect; everything else uses the platform's own sign-in. Once connected, the account appears in GET /api/v1/accounts.
Disconnecting accounts
curl -X DELETE https://feedhorizon.com/api/v1/accounts/ACCOUNT_ID \
-H "Authorization: Bearer fh_YOUR_API_KEY"This removes the account and its stored tokens from FeedHorizon. Its scheduled posts on this account are deleted with it. Posts already published stay on the platform. FeedHorizon's access is not revoked at the platform; the user can remove FeedHorizon in the platform's app settings.