curl --request GET \
  --url https://api-v2.hayinsights.com/openapi/v1/etf/heatmap \
  --header 'X-API-Key: <api-key>'

import requests

url = "https://api-v2.hayinsights.com/openapi/v1/etf/heatmap"

headers = {"X-API-Key": "<api-key>"}

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

print(response.text)

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

fetch('https://api-v2.hayinsights.com/openapi/v1/etf/heatmap', 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://api-v2.hayinsights.com/openapi/v1/etf/heatmap",
  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-API-Key: <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://api-v2.hayinsights.com/openapi/v1/etf/heatmap"

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

	req.Header.Add("X-API-Key", "<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://api-v2.hayinsights.com/openapi/v1/etf/heatmap")
  .header("X-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-v2.hayinsights.com/openapi/v1/etf/heatmap")

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

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

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

{
  "success": true,
  "statusCode": 200,
  "data": [
    {
      "code": "1305",
      "name": "iFreeETF TOPIX (Yearly Dividend Type)",
      "currency": "JPY",
      "currentDate": "2026-06-16T17:00:00.000Z",
      "closePrice": 4299,
      "volume": 71520,
      "marketCap": 307464480,
      "tradingValue": 307464480,
      "priceFluctuation": 19,
      "priceFluctuationPercent": 0.44,
      "contributionValue": 1352843.7119999998,
      "marketCapChange": -1835060720,
      "contributionArea": 0.07973
    },
    {
      "code": "1306",
      "name": "NEXT FUNDS TOPIX Exchange Traded Fund",
      "currency": "JPY",
      "currentDate": "2026-06-16T17:00:00.000Z",
      "closePrice": 425.5,
      "volume": 11852430,
      "marketCap": 5043208965,
      "tradingValue": 5043208965,
      "priceFluctuation": 2.4,
      "priceFluctuationPercent": 0.57,
      "contributionValue": 28746291.1005,
      "marketCapChange": -2150997271,
      "contributionArea": 1.69419
    }
  ],
  "meta": {
    "timestamp": "2026-06-19T08:50:00.000Z"
  }
}

{
  "success": false,
  "statusCode": 401,
  "error": {
    "code": "API_KEY_INVALID",
    "message": "Invalid API key"
  },
  "meta": {
    "timestamp": "2026-06-19T08:34:08.023Z"
  }
}

{
  "success": false,
  "statusCode": 403,
  "error": {
    "code": "FEATURE_NOT_IN_PLAN",
    "message": "Your plan does not include this feature"
  },
  "meta": {
    "timestamp": "2026-06-19T08:34:08.100Z"
  }
}

{
  "success": false,
  "statusCode": 429,
  "error": {
    "code": "RATE_LIMIT_EXCEEDED",
    "message": "Rate limit exceeded"
  },
  "meta": {
    "timestamp": "2026-06-19T08:34:09.000Z"
  }
}

{
  "success": false,
  "statusCode": 500,
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  },
  "meta": {
    "timestamp": "2026-06-19T08:34:10.000Z"
  }
}