---
title: "LinkedIn API v1 to v2 (Versioned) Migration: The Developer’s Survival Guide"
description: "Migrating from LinkedIn's legacy API to the Versioned API (v2/rest)? Ayrshare covers the base URL, header, and payload changes, and how to avoid them entirely."
canonical: https://www.ayrshare.com/solutions/linkedin-api-v1-to-v2-versioned-migration-the-developers-survival-guide/
lastModified: 2026-07-31
pageType: solution
---

# LinkedIn API v1 to v2 (Versioned) Migration: The Developer’s Survival Guide

> Migrating from LinkedIn's legacy API to the Versioned API (v2/rest)? Ayrshare covers the base URL, header, and payload changes, and how to avoid them entirely.

## LinkedIn API v1 to v2 (Versioned) Migration: The Developer’s Survival Guide

[Start free trial](https://app.ayrshare.com)
[View pricing](/pricing/)

If you are maintaining a legacy integration, you have likely received a series of urgent emails from LinkedIn regarding “Versioned APIs” and the sunsetting of unversioned endpoints. In the world of social media engineering, few things are as disruptive as a mandatory migration that changes your **Base URLs**, **Header requirements**, and **JSON structures** all at once.

At **Ayrshare**, we’ve handled the heavy lifting of these migrations for thousands of developers. Here is the technical breakdown of the move from the legacy v1-style unversioned API to the new **Monthly Versioned API (v2/rest)**.

## The Diagnosis: What is Actually Breaking?

LinkedIn has officially moved away from the legacy `https://api.linkedin.com/v2/` base path for its Marketing and Community Management APIs. The new standard uses a **monthly release cycle** designed to prevent silent breaking changes, but it requires a total overhaul of how your requests are structured.

### 1. The Base URL Shift

The old base URL was `https://api.linkedin.com/v2/`. The new versioned base URL is `https://api.linkedin.com/rest/`. Any request sent to the old path for updated products will return a 410 Gone or a 404 Not Found.

### 2. Mandatory Version Headers

In the legacy API, you just hit an endpoint. In the new Versioned API, every single request **must** include a LinkedIn-Version header in the format YYYYMM.

- **Example:** LinkedIn-Version: 202601

If this header is missing or refers to a sunsetted version (versions are usually supported for only one year), your API call will fail with a **400 Bad Request**.

### 3. The Death of “ShareV2” and “UGCPost”

Legacy endpoints like `/shares` and `/ugcPosts` have been deprecated in favor of the unified `/posts` endpoint. The JSON payload structure for `/posts` is fundamentally different, moving away from complex nested objects to a flatter, more “commentary-first” structure.

## The Manual Fix: Updating Your API Stack

To migrate natively, you must update your client configuration to support dynamic versioning.

### 1. Update the Base URL and Headers

You must ensure your HTTP client (Axios, Fetch, etc.) includes the new required headers for the Restli 2.0.0 protocol.

### Technical Implementation (Node.js)

```javascript
const axios = require('axios');

async function createPostVersioned(accessToken, content, authorUrn) {
  const version = '202601'; // You must update this at least once a year

  try {
    const response = await axios.post('https://api.linkedin.com/rest/posts', {
      author: authorUrn,
      commentary: content,
      visibility: "PUBLIC",
      distribution: {
        feedDistribution: "MAIN_FEED"
      },
      lifecycleState: "PUBLISHED"
    }, {
      headers: {
        'Authorization': `Bearer ${accessToken}`,
        'LinkedIn-Version': version,
        'X-Restli-Protocol-Version': '2.0.0',
        'Content-Type': 'application/json'
      }
    });
    return response.data;
  } catch (error) {
    console.error("Migration Error:", error.response.data);
    // Common error: 400 - "Version [YYYYMM] is no longer supported"
  }
}
```

### Why this is an engineering burden:

- **The “Maintenance Tax”:** You must now track LinkedIn’s release calendar. If you forget to update your version header, your entire integration will break on the day of sunset.
- **Payload Refactoring:** Every media type (images, videos, articles) has a new JSON schema in the `/posts` endpoint that is not backward-compatible with `/ugcPosts`.
- **Asset Registration:** Uploading images now requires a multi-step “Register Upload” flow that differs significantly from the v1 logic.

For more detail, see [LinkedIn API documentation](/docs/apis/post/social-networks/linkedin).

## The Ayrshare Solution: Total Version Abstraction

Ayrshare was built so you never have to read a “Migration Guide” again. We act as a permanent bridge between your code and the ever-changing social platforms.

- **Automatic Version Rotation:** We manage the LinkedIn-Version headers on our side. When LinkedIn releases a new version, our engineers update our backend. **Your code remains exactly the same.**
- **Unified Payload:** You send a simple post string and a mediaUrls array. We translate that into the specific, complex JSON required by the latest LinkedIn `/posts` endpoint.
- **Legacy Support:** If you were using our API during the v1 to v2 shift, your integration never went down. We handled the transition silently.

### Comparison: Native vs. Ayrshare

```javascript
const ayrshare = require('ayrshare-node')('YOUR_API_KEY');

// This code worked 2 years ago, works today, and will work 2 years from now.
const post = await ayrshare.post({
  post: "Migrating to LinkedIn v2 without rewriting my backend.",
  platforms: ["linkedin"],
  mediaUrls: ["https://example.com/image.jpg"]
});
```

For more detail, see [LinkedIn 403 Error (URN Mismatches & Permissions)](/solutions/linkedin-403-unpermitted-access-urn-mismatches-permissions/).

For more detail, see [Meta Graph API Versioning Survival Kit](/solutions/meta-graph-api-versioning-survival-kit-staying-ahead-of-v21-v22-and-beyond/).

For more detail, see [Moving from Twitter v1.1 to v2](/solutions/moving-from-twitter-v1-1-to-v2-bridging-the-json-gap/).

## LinkedIn API v1 to v2 Migration: FAQs

### Do Ayrshare customers need to track LinkedIn's versioned API release calendar?

No. Ayrshare's engineering team updates the LinkedIn-Version header on its backend whenever LinkedIn releases a new monthly version, so a customer's own integration code doesn't change.
### Did integrations built on Ayrshare break during LinkedIn's v1 to v2 migration?

Ayrshare handled the v1 to v2 transition on its own infrastructure, so accounts already using Ayrshare's unified post endpoint continued publishing without any changes on the customer's side.
### What happens to my code if I use Ayrshare instead of LinkedIn's /posts endpoint directly?

Ayrshare translates a simple post string and mediaUrls array into whatever JSON structure LinkedIn's current /posts endpoint requires, which means your integration code stays the same even as LinkedIn's schema changes underneath it.
### How long does a LinkedIn API version stay supported?

LinkedIn generally supports each monthly version for one year from release; Ayrshare tracks these sunset dates for every customer so a missed migration deadline never causes a production outage.

## Ship Social Features in Days, Not Quarters

Start your 28-day free trial, or talk with our team about pricing for thousands of profiles.

[Start free trial](https://app.ayrshare.com)
[Book A Demo](/contact/)