LinkedIn Data API

Retrieve LinkedIn employee counts, follower metrics, and job postings. Track workforce growth and company popularity as alternative data signals.

Endpoint

GET /v2/linkedin/{symbol}

Authentication

Authenticate using one of the following methods (in order of recommendation):

Method	Example
Bearer token (recommended)	Authorization: Bearer YOUR_API_KEY
X-API-Key header	X-API-Key: YOUR_API_KEY
Query parameter	?apiKey=YOUR_API_KEY
Legacy query parameter	?token=YOUR_API_KEY

Parameters

Path Parameters

Parameter	Type	Required	Description
symbol	string	Yes	Stock ticker symbol (e.g., AAPL, META)

Query Parameters

Parameter	Type	Required	Description
startDate	string	No	Start date (YYYY-MM-DD)
endDate	string	No	End date (YYYY-MM-DD)
limit	integer	No	Maximum number of data points to return

Request

Python SDK

from finbrain import FinBrainClient

fb = FinBrainClient(api_key="YOUR_API_KEY")

df = fb.linkedin_data.ticker("META",
                             date_from="2025-01-01",
                             date_to="2025-06-30",
                             as_dataframe=True)
print(df)

cURL

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.finbrain.tech/v2/linkedin/META"

Python (requests)

import requests

url = "https://api.finbrain.tech/v2/linkedin/META"
headers = {"Authorization": "Bearer YOUR_API_KEY"}
params = {"startDate": "2025-01-01", "endDate": "2026-01-31", "limit": 10}

response = requests.get(url, headers=headers, params=params)
data = response.json()

for entry in data["data"]["data"]:
    print(f"{entry['date']}: {entry['employeeCount']} employees, "
          f"{entry['followerCount']} followers, jobs: {entry['jobCount']}")

C++

#include <iostream>
#include <string>
#include <curl/curl.h>
#include <nlohmann/json.hpp>

using json = nlohmann::json;

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* userp) {
    userp->append((char*)contents, size * nmemb);
    return size * nmemb;
}

json get_linkedin_data(const std::string& symbol, const std::string& api_key) {
    CURL* curl = curl_easy_init();
    std::string response;

    if (curl) {
        std::string url = "https://api.finbrain.tech/v2/linkedin/" + symbol;

        struct curl_slist* headers = nullptr;
        std::string auth_header = "Authorization: Bearer " + api_key;
        headers = curl_slist_append(headers, auth_header.c_str());

        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);
        curl_easy_perform(curl);
        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
    }

    return json::parse(response);
}

int main() {
    auto result = get_linkedin_data("AMZN", "YOUR_API_KEY");

    for (auto& entry : result["data"]["data"]) {
        std::cout << entry["date"].get<std::string>() << ": "
                  << entry["employeeCount"].get<int64_t>() << " employees, "
                  << entry["followerCount"].get<int64_t>() << " followers"
                  << std::endl;
    }

    return 0;
}

Rust

use reqwest::blocking::Client;
use serde::Deserialize;
use std::error::Error;

#[derive(Debug, Deserialize)]
struct LinkedInEntry {
    date: String,
    #[serde(rename = "employeeCount")]
    employee_count: i64,
    #[serde(rename = "followerCount")]
    follower_count: i64,
    #[serde(rename = "jobCount")]
    job_count: Option<i64>,
}

#[derive(Debug, Deserialize)]
struct LinkedInInner {
    symbol: String,
    name: String,
    data: Vec<LinkedInEntry>,
}

#[derive(Debug, Deserialize)]
struct LinkedInResponse {
    success: bool,
    data: LinkedInInner,
}

fn get_linkedin_data(symbol: &str, api_key: &str)
    -> Result<LinkedInResponse, Box<dyn Error>> {
    let url = format!(
        "https://api.finbrain.tech/v2/linkedin/{}",
        symbol
    );

    let client = Client::new();
    let response: LinkedInResponse = client
        .get(&url)
        .header("Authorization", format!("Bearer {}", api_key))
        .send()?
        .json()?;

    Ok(response)
}

fn main() -> Result<(), Box<dyn Error>> {
    let result = get_linkedin_data("AMZN", "YOUR_API_KEY")?;

    for entry in &result.data.data {
        println!("{}: {} employees, {} followers, jobs: {:?}",
            entry.date, entry.employee_count, entry.follower_count, entry.job_count);
    }

    Ok(())
}

JavaScript

const response = await fetch(
  "https://api.finbrain.tech/v2/linkedin/META",
  { headers: { "Authorization": "Bearer YOUR_API_KEY" } }
);
const result = await response.json();

for (const entry of result.data.data) {
  console.log(`${entry.date}: ${entry.employeeCount} employees, ${entry.followerCount} followers`);
}

Response

Success Response (200 OK)

{
  "success": true,
  "data": {
    "symbol": "AAPL",
    "name": "Apple Inc.",
    "data": [
      {
        "date": "2026-01-14",
        "employeeCount": 166090,
        "followerCount": 18039757,
        "jobCount": null
      },
      {
        "date": "2026-01-07",
        "employeeCount": 165645,
        "followerCount": 18030998,
        "jobCount": null
      }
    ]
  },
  "meta": {
    "timestamp": "2026-01-19T15:06:32.503Z"
  }
}

Response Fields

Field	Type	Description
success	boolean	Whether the request was successful
data	object	Response data wrapper
data.symbol	string	Stock ticker symbol
data.name	string	Company name
data.data	array	Array of LinkedIn data points
meta.timestamp	string	Response timestamp (ISO 8601)

LinkedIn Object Fields

Field	Type	Description
date	string	Date (YYYY-MM-DD)
employeeCount	integer	Number of employees on LinkedIn
followerCount	integer	LinkedIn page followers count
jobCount	integer/null	Number of open job postings (may be null)

Interpretation

YoY Growth	Signal
Above 20%	Rapid expansion
10-20%	Healthy growth
0-10%	Moderate growth
-10-0%	Slight contraction
Below -10%	Significant layoffs

Errors

Code	Error	Description
400	Bad Request	Invalid symbol
401	Unauthorized	Invalid or missing API key
403	Forbidden	Authenticated, but not authorized to access this resource
404	Not Found	Symbol not found
429	Too Many Requests	Rate limit exceeded — wait and retry
500	Internal Server Error	Server-side error

Related

• LinkedIn Metrics Dataset - Use cases and analysis examples
• App Ratings - Mobile app metrics
• Sentiments - News sentiment