curl -H "X-FH-APIKEY: $FINHAY_API_KEY" \
  "https://open-api.fhsc.com.vn/market/sectors/financials/constituents?sort=-market_cap"

import requests

url = "https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents"

headers = {"X-FH-APIKEY": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'X-FH-APIKEY': '<api-key>'}};

fetch('https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "X-FH-APIKEY: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("X-FH-APIKEY", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents")
  .header("X-FH-APIKEY", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://open-api.fhsc.com.vn/market/sectors/{slug}/constituents")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["X-FH-APIKEY"] = '<api-key>'

response = http.request(request)
puts response.read_body

{
  "data": {
    "sector": "financials",
    "items": [
      {
        "symbol": "VCB",
        "name": "Ngân hàng TMCP Ngoại thương Việt Nam",
        "exchange": "HOSE",
        "weight_percent": 18.42,
        "market_cap": 512000000000000
      }
    ],
    "name": "Tài chính",
    "page": 1,
    "page_size": 20,
    "total": 87,
    "updated_at": "2026-08-17T14:30:15+07:00"
  },
  "error_code": "0",
  "message": "success"
}

{
  "error_code": "400",
  "message": "Invalid parameter"
}

{
  "error_code": "401",
  "message": "Invalid signature"
}

{
  "error_code": "404",
  "message": "Not found"
}

{
  "error_code": "429",
  "message": "Too many requests"
}

{
  "error_code": "500",
  "message": "Internal server error"
}