LinkedIn API guide

Publish text, an image or a video to a LinkedIn profile or Company Page. Platform key: linkedin.

Last checked against the API October 10, 2026 · View as Markdown

Platform keylinkedin
Text limit3,000 characters
MediaThe first attachment is used: one image or one video. Without media the post is text only.

Things to know

  • A Company Page connected in Postprism appears in GET /api/v1/platforms as linkedin:org:<page id>, next to the personal linkedin profile. Use that exact key in platforms and platform_content.
  • LinkedIn accepts videos from 75 KB; the API accepts videos up to 100 MB.

Settings

Optional LinkedIn options go in platform_content.linkedin.settings. Invalid values are rejected when you create or update the post, with a message naming the field.

FieldTypeDescription
visibility"PUBLIC" or "CONNECTIONS"Who can see a post on a personal profile. Default PUBLIC. Company Page posts are always public.
platform_content.linkedin
"linkedin": {
  "content": "Three things we learned rebuilding our onboarding…",
  "settings": { "visibility": "CONNECTIONS" }
}

Example

POST /api/v1/posts
{
  "base_content": "Our autumn menu is here.",
  "platforms": ["linkedin"],
  "platform_content": {
    "linkedin": {
      "content": "Our autumn menu is here. Which drink first?"
    }
  },
  "scheduled_at": "2026-10-16T09:30:00Z"
}

Other platforms: X (Twitter), TikTok, YouTube, Pinterest, Bluesky. Writing limits for every network are in our character limit reference, and the LinkedIn scheduler page covers scheduling from the app.

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