curl --request GET \
  --url https://www.prometheus.services/api/v1/indices \
  --header 'X-API-KEY: <api-key>'

import requests

url = "https://www.prometheus.services/api/v1/indices"

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://www.prometheus.services/api/v1/indices', 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://www.prometheus.services/api/v1/indices",
  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://www.prometheus.services/api/v1/indices"

	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://www.prometheus.services/api/v1/indices")
  .header("X-API-KEY", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://www.prometheus.services/api/v1/indices")

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

{
  "indices": [
    {
      "symbol": "SPY",
      "name": "SPDR S&P 500 ETF Trust",
      "short_name": "S&P 500",
      "category": "broad_market",
      "benchmark_role": "market",
      "sector_key": null,
      "index_family": "S&P 500",
      "issuer": "State Street",
      "expense_ratio": 0.0945,
      "inception_date": "1993-01-22",
      "last_price": 765.719971,
      "last_price_date": "2026-08-21",
      "return_1d": 0.004091260291358756,
      "return_1w": -0.013679645040381216,
      "return_1m": 0.023306705142601025,
      "return_ytd": 0.12885560863708556,
      "return_1y": 0.21816440082463728,
      "return_5y": 0.847878538609889,
      "low_52w": 629.280029,
      "high_52w": 779.369995,
      "volatility_30d": 0.12358656186305594,
      "price_rows": 8448,
      "days_stale": 3
    },
    {
      "symbol": "QQQ",
      "name": "Invesco QQQ Trust, Series 1",
      "short_name": "Nasdaq-100",
      "category": "broad_market",
      "benchmark_role": "none",
      "sector_key": null,
      "index_family": "Nasdaq-100",
      "issuer": "Invesco",
      "expense_ratio": 0.2,
      "inception_date": "1999-03-10",
      "last_price": 713.440002,
      "last_price_date": "2026-08-21",
      "return_1d": 0.0035305993905367927,
      "return_1w": -0.024115344400936434,
      "return_1m": 0.006304965207052593,
      "return_ytd": 0.16411036717849448,
      "return_1y": 0.27268141471996343,
      "return_5y": 0.9991140896122617,
      "low_52w": 555.599976,
      "high_52w": 748.650024,
      "volatility_30d": 0.21897382889282002,
      "price_rows": 6906,
      "days_stale": 3
    },
    {
      "symbol": "DIA",
      "name": "SPDR Dow Jones Industrial Average ETF",
      "short_name": "Dow 30",
      "category": "broad_market",
      "benchmark_role": "none",
      "sector_key": null,
      "index_family": "Dow Jones Industrial Average",
      "issuer": "State Street",
      "expense_ratio": 0.16,
      "inception_date": "1998-01-14",
      "last_price": 532.219971,
      "last_price_date": "2026-08-21",
      "return_1d": 0.009765199544523151,
      "return_1w": -0.007710040455795486,
      "return_1m": 0.021382576900711436,
      "return_ytd": 0.11701306676802092,
      "return_1y": 0.2063183455157358,
      "return_5y": 0.6524115739244694,
      "low_52w": 450.160004,
      "high_52w": 546.75,
      "volatility_30d": 0.1276985638829502,
      "price_rows": 7192,
      "days_stale": 3
    }
  ]
}

{
  "error": "<string>",
  "code": "unauthenticated"
}

{
  "error": "<string>",
  "code": "unauthenticated"
}

{
  "error": "<string>",
  "code": "unauthenticated"
}

{
  "error": "<string>",
  "code": "unauthenticated"
}