LinkedIn

Overview

FeedHorizon supports publishing text posts, image posts, and video posts to LinkedIn personal profiles and company pages.

Authentication

LinkedIn uses OAuth 2.0. Connect your account through the Dashboard → Connections page. FeedHorizon requests the following scopes:

openid — Authenticate user identity
profile — Read profile metadata
email — Read account email
w_member_social — Post on behalf of the user

Content guidelines

Feature	Limit
Text length	3,000 characters
Images per post	Up to 9
Videos per post	1 (cannot mix with images)
Image formats	JPEG, PNG, GIF, WebP
Video formats	MP4, MOV, AVI, WebM
Document formats	PDF
Max image size	5 GB
Max video size	5 GB
Max document size	100 MB

Creating a LinkedIn post

Text post

cURL

curl -X POST https://app.feedhorizon.dev/api/v1/posts \
  -H "Authorization: Bearer fh_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Excited to announce our new API! Check it out at https://feedhorizon.dev",
    "platforms": ["linkedin"],
    "profileId": "YOUR_PROFILE_ID",
    "publishNow": true
  }'

Scheduled post

cURL

curl -X POST https://app.feedhorizon.dev/api/v1/posts \
  -H "Authorization: Bearer fh_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "This will be posted tomorrow morning!",
    "platforms": ["linkedin"],
    "profileId": "YOUR_PROFILE_ID",
    "scheduledFor": "2026-03-01T09:00:00Z",
    "timezone": "Europe/Berlin"
  }'

LinkedIn-specific response fields

When a post is published to LinkedIn, the response includes the LinkedIn-native post URN:

{
    "platformPostIds": {
        "linkedin": "urn:li:share:7654321098765432"
    }
}

Error handling

Common LinkedIn-specific errors:

Error	Cause	Solution
`Token expired`	OAuth token needs refresh	Re-connect the account in the dashboard
`Content too long`	Exceeds 3,000 characters	Shorten your content
`Duplicate content`	LinkedIn blocks identical posts	Modify the content slightly
`Rate limit`	LinkedIn's own API rate limit	Wait and retry (FeedHorizon handles this automatically)

Best practices

Keep posts under 1,300 characters for optimal engagement (LinkedIn truncates after ~210 characters in the feed)
Use line breaks to improve readability
Include a call-to-action at the end
Schedule posts between 8-10 AM in your target audience's timezone
Avoid posting more than once per day to the same account

On this page