Post to LinkedIn from one API.

Publish to LinkedIn from your app with one REST call, or let your AI agent do it over MCP. SocialHelper checks every post against LinkedIn’s limits before it goes out.

Get a free API key Read the docs

Live Connects with OAuth Receives posts

SocialHelper connected LinkedIn

What you can post

LinkedIn limits.

These are the limits the API enforces for LinkedIn, read straight from the code. Every post is checked against them before anything is sent.

Posts to LinkedIn member (personal) profiles. Company Pages are not supported yet.

Text: 3,000 characters
Images: Up to 20 per post · JPEG, PNG, GIF · 5 MB each
Video: Not supported

Post with one request

Your first LinkedIn post.

Send the text and the account ID. Add an Idempotency-Key so a retried request never posts twice. The response lists each account with its own status and, once it’s live, the post’s URL.

curl https://socialhelper.app/api/v1/posts \
  -H "Authorization: Bearer $SOCIALHELPER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
      "text": "We just shipped dark mode. Try it tonight 🌙",
      "accounts": [
          "ACCOUNT_ID"
      ]
  }'

const response = await fetch("https://socialhelper.app/api/v1/posts", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.SOCIALHELPER_API_KEY}`,
    "Content-Type": "application/json",
    "Idempotency-Key": crypto.randomUUID(),
  },
  body: JSON.stringify({
      "text": "We just shipped dark mode. Try it tonight 🌙",
      "accounts": [
          "ACCOUNT_ID"
      ]
  }),
});

const { data: post } = await response.json();
console.log(post.status, post.targets);

import os, uuid, requests

response = requests.post(
    "https://socialhelper.app/api/v1/posts",
    headers={
        "Authorization": f"Bearer {os.environ['SOCIALHELPER_API_KEY']}",
        "Idempotency-Key": str(uuid.uuid4()),
    },
    json={
        "text": "We just shipped dark mode. Try it tonight 🌙",
        "accounts": ["ACCOUNT_ID"],
    },
)

post = response.json()["data"]
print(post["status"], post["targets"])

Connect

Connect LinkedIn once.

Open Accounts in the SocialHelper dashboard and choose LinkedIn. You sign in on LinkedIn’s own screen and approve access; SocialHelper stores the connection encrypted. You don’t need a LinkedIn developer app of your own.

1

Open Accounts

In the dashboard, choose LinkedIn.
2

Sign in on LinkedIn

Approve access on LinkedIn’s own screen.
3

Use the account ID

GET /api/v1/accounts lists the account with its ID, whether it can publish, and its tools.