curl --request GET \
  --url https://api.messari.io/metrics/v2/protocols/etfs \
  --header 'X-Messari-API-Key: <api-key>'

import requests

url = "https://api.messari.io/metrics/v2/protocols/etfs"

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

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

print(response.text)

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

fetch('https://api.messari.io/metrics/v2/protocols/etfs', 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.messari.io/metrics/v2/protocols/etfs",
  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-Messari-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.messari.io/metrics/v2/protocols/etfs"

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

	req.Header.Add("X-Messari-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.messari.io/metrics/v2/protocols/etfs")
  .header("X-Messari-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.messari.io/metrics/v2/protocols/etfs")

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

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

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

{
  "error": null,
  "data": {
    "data": [
      {
        "id": "blackrock",
        "slug": "blackrock",
        "name": "BlackRock",
        "asOf": 1787270400,
        "metrics": {
          "aumUsd": 69035555967,
          "flowUsd": 776184468,
          "numProducts": 8,
          "weightedAumExpenseRatio": 0.002489769699759677,
          "bitcoinAumPerc": 0.8771670448767953,
          "spotAumPerc": 0.9989685136738227,
          "rolling30dFlowUsd": 2278552478,
          "aum30dChangePerc": 0.2604181259715074
        }
      },
      {
        "id": "grayscale",
        "slug": "grayscale",
        "name": "Grayscale",
        "asOf": 1787270400,
        "metrics": {
          "aumUsd": 19674093972,
          "flowUsd": 9649610,
          "numProducts": 17,
          "weightedAumExpenseRatio": 0.010781808503369489,
          "bitcoinAumPerc": 0.7534320894825499,
          "spotAumPerc": 0.9988471478771892,
          "rolling30dFlowUsd": 47624438,
          "aum30dChangePerc": 0.2221210439264214
        }
      },
      {
        "id": "fidelity",
        "slug": "fidelity",
        "name": "Fidelity",
        "asOf": 1787270400,
        "metrics": {
          "aumUsd": 16333700368,
          "flowUsd": 78555503,
          "numProducts": 6,
          "weightedAumExpenseRatio": 0.0026353644271711794,
          "bitcoinAumPerc": 0.9127296812795311,
          "spotAumPerc": 1,
          "rolling30dFlowUsd": 217897331,
          "aum30dChangePerc": 0.22125080250160287
        }
      },
      {
        "id": "bitwise",
        "slug": "bitwise-asset-management",
        "name": "Bitwise Asset Management",
        "asOf": 1787270400,
        "metrics": {
          "aumUsd": 7313252055,
          "flowUsd": 58535177,
          "numProducts": 29,
          "weightedAumExpenseRatio": 0.005947079384849672,
          "bitcoinAumPerc": 0.5376709484957031,
          "spotAumPerc": 1,
          "rolling30dFlowUsd": 127567875,
          "aum30dChangePerc": 0.23493029064431553
        }
      },
      {
        "id": "21shares",
        "slug": "21shares",
        "name": "21Shares",
        "asOf": 1787270400,
        "metrics": {
          "aumUsd": 6053211130,
          "flowUsd": 14849115,
          "numProducts": 71,
          "weightedAumExpenseRatio": 0.009072870196929678,
          "bitcoinAumPerc": 0.6343309095845133,
          "spotAumPerc": 0.997981592788091,
          "rolling30dFlowUsd": 87247089,
          "aum30dChangePerc": 0.2302057140879824
        }
      }
    ],
    "metadata": {
      "pageSize": 100,
      "page": 1,
      "totalRows": 76,
      "totalPages": 1
    }
  }
}

{
  "data": "<unknown>",
  "error": "<string>"
}

{
  "data": "<unknown>",
  "error": "<string>"
}

{
  "data": "<unknown>",
  "error": "<string>"
}