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

import requests

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

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', 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",
  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"

	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")
  .header("X-Messari-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

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

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": "1eaf063a-b8dd-4cfb-95dd-a06338565720",
        "name": "Tether",
        "slug": "tether",
        "activity": {
          "tvl24HourUsd": 189897138186.01645,
          "activeAddresses24Hour": 1060654,
          "fees24HourUsd": 14624148.950597258
        }
      },
      {
        "id": "9e46405d-d9e8-4dd3-8dc6-0cd2d81ffedc",
        "name": "Circle",
        "slug": "circle-usdc",
        "activity": {
          "tvl24HourUsd": 75331149501.26874,
          "activeAddresses24Hour": 481093,
          "fees24HourUsd": 7518154.914472456
        }
      },
      {
        "id": "675b85dc-85a1-4096-9600-212e90a56e9a",
        "name": "Aave",
        "slug": "aave",
        "activity": {
          "tvl24HourUsd": 54964415837.89591,
          "activeAddresses24Hour": 13456,
          "fees24HourUsd": 2423233.7748409403
        }
      },
      {
        "id": "8b8a7fe3-65ad-41ed-9a0c-3292d3db50e0",
        "name": "Dai",
        "slug": "dai",
        "activity": {
          "tvl24HourUsd": 16518660202.05622,
          "activeAddresses24Hour": 41266,
          "fees24HourUsd": null
        }
      },
      {
        "id": "aa76e4fd-e785-4656-ab3c-b3c133242cae",
        "name": "Spark",
        "slug": "spark-bot",
        "activity": {
          "tvl24HourUsd": 12412872654.134151,
          "activeAddresses24Hour": 58,
          "fees24HourUsd": 244397.8248833879
        }
      }
    ],
    "metadata": {
      "pageSize": 100,
      "page": 1,
      "totalRows": 208,
      "totalPages": 3
    }
  }
}

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

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

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