LinkedIn Data API

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

Endpoint

GET /v1/linkedindata/{market}/{ticker}

Authentication

Requires API key via token query parameter.

Parameters

Path Parameters

Parameter	Type	Required	Description
market	string	Yes	Market identifier (e.g., S&P 500, NASDAQ)
ticker	string	Yes	Stock ticker symbol (e.g., AAPL, META)

Query Parameters

Parameter	Type	Required	Description
token	string	Yes	Your API key
dateFrom	string	No	Start date (YYYY-MM-DD)
dateTo	string	No	End date (YYYY-MM-DD)

Request

cURL

curl "https://api.finbrain.tech/v1/linkedindata/S%26P%20500/META?token=YOUR_API_KEY"

Python SDK

from finbrain import FinBrainClient

fb = FinBrainClient(api_key="YOUR_API_KEY")

# Get as DataFrame (recommended)
df = fb.linkedin_data.ticker("S&P 500", "META", as_dataframe=True)
print(df.head())
#             employeeCount  followersCount
# date
# 2024-03-20        67000       12500000
# 2024-03-13        66850       12480000

# Get raw JSON response
linkedin = fb.linkedin_data.ticker("S&P 500", "META")
print(linkedin)

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& market, const std::string& ticker,
                       const std::string& api_key) {
    CURL* curl = curl_easy_init();
    std::string response;

    if (curl) {
        char* encoded_market = curl_easy_escape(curl, market.c_str(), 0);
        std::string url = "https://api.finbrain.tech/v1/linkedindata/" +
                          std::string(encoded_market) + "/" + ticker +
                          "?token=" + api_key;
        curl_free(encoded_market);

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

    return json::parse(response);
}

int main() {
    auto data = get_linkedin_data("S&P 500", "AMZN", "YOUR_API_KEY");

    for (auto& entry : data["linkedinData"]) {
        std::cout << entry["date"].get<std::string>() << ": "
                  << entry["employeeCount"].get<int64_t>() << " employees, "
                  << entry["followersCount"].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 = "followersCount")]
    followers_count: i64,
}

#[derive(Debug, Deserialize)]
struct LinkedInResponse {
    ticker: String,
    name: String,
    #[serde(rename = "linkedinData")]
    linkedin_data: Vec<LinkedInEntry>,
}

fn get_linkedin_data(market: &str, ticker: &str, api_key: &str)
    -> Result<LinkedInResponse, Box<dyn Error>> {
    let url = format!(
        "https://api.finbrain.tech/v1/linkedindata/{}/{}?token={}",
        urlencoding::encode(market), ticker, api_key
    );

    let client = Client::new();
    let response: LinkedInResponse = client.get(&url).send()?.json()?;

    Ok(response)
}

fn main() -> Result<(), Box<dyn Error>> {
    let data = get_linkedin_data("S&P 500", "AMZN", "YOUR_API_KEY")?;

    for entry in &data.linkedin_data {
        println!("{}: {} employees, {} followers",
            entry.date, entry.employee_count, entry.followers_count);
    }

    Ok(())
}

JavaScript

const market = encodeURIComponent("S&P 500");
const response = await fetch(
  `https://api.finbrain.tech/v1/linkedindata/${market}/META?token=YOUR_API_KEY`
);
const data = await response.json();

Response

Success Response (200 OK)

{
  "ticker": "AMZN",
  "name": "Amazon.com Inc.",
  "linkedinData": [
    {
      "date": "2024-03-20",
      "employeeCount": 755461,
      "followersCount": 30628460
    }
  ]
}

Response Fields

Field	Type	Description
ticker	string	Stock ticker symbol
name	string	Company name
linkedinData	array	Array of LinkedIn data points

LinkedIn Object Fields

Field	Type	Description
date	string	Date (YYYY-MM-DD)
employeeCount	integer	Number of employees on LinkedIn
followersCount	integer	LinkedIn page followers count

Interpretation

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

Errors

Code	Error	Description
400	Bad Request	Invalid market or ticker
401	Unauthorized	Invalid or missing API key
404	Not Found	Ticker not found
500	Internal Server Error	Server-side error

Related

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