LinkedIn API integration with website

LinkedIn API Integration with Website

LinkedIn API is used for authorization via LinkedIn account, auto-posting company content, and displaying profile on your website. Relevant for B2B products and corporate portals.

OAuth2 Authorization

Route::get('/auth/linkedin/redirect', function () {
    return redirect('https://www.linkedin.com/oauth/v2/authorization?' . http_build_query([
        'response_type' => 'code',
        'client_id'     => config('services.linkedin.client_id'),
        'redirect_uri'  => route('auth.linkedin.callback'),
        'scope'         => 'openid profile email w_member_social',
        'state'         => Str::random(16),
    ]));
});

Route::get('/auth/linkedin/callback', function (Request $request) {
    $tokenResp = Http::post('https://www.linkedin.com/oauth/v2/accessToken', [
        'grant_type'    => 'authorization_code',
        'code'          => $request->code,
        'redirect_uri'  => route('auth.linkedin.callback'),
        'client_id'     => config('services.linkedin.client_id'),
        'client_secret' => config('services.linkedin.client_secret'),
    ])->json();

    $accessToken = $tokenResp['access_token'];

    // Get user profile
    $profile = Http::withToken($accessToken)
        ->get('https://api.linkedin.com/v2/userinfo')
        ->json();

    // $profile contains: sub (ID), name, email, picture
    return redirect('/dashboard');
});

Publishing Company Post

LinkedIn API v2 requires application registration and Marketing Developer Platform approval (for posting):

import requests

def create_company_post(access_token: str, org_id: str, text: str) -> str:
    headers = {
        'Authorization': f'Bearer {access_token}',
        'X-Restli-Protocol-Version': '2.0.0',
    }

    payload = {
        'author': f'urn:li:organization:{org_id}',
        'lifecycleState': 'PUBLISHED',
        'specificContent': {
            'com.linkedin.ugc.ShareContent': {
                'shareCommentary': {'text': text},
                'shareMediaCategory': 'NONE',
            }
        },
        'visibility': {'com.linkedin.ugc.MemberNetworkVisibility': 'PUBLIC'},
    }

    resp = requests.post('https://api.linkedin.com/v2/ugcPosts', headers=headers, json=payload)
    return resp.json()['id']

Limitations

LinkedIn API strictly regulates access. For corporate posting, you need application verification through the LinkedIn Partner Program. Approval timeline is 4–6 weeks.

Implementation time (OAuth authorization): 2–3 business days. Corporate posting: depends on LinkedIn approval.