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": 188644665207.35986,
          "activeAddresses24Hour": 1122231,
          "fees24HourUsd": 14618429.653360274
        }
      },
      {
        "id": "9e46405d-d9e8-4dd3-8dc6-0cd2d81ffedc",
        "name": "Circle",
        "slug": "circle-usdc",
        "activity": {
          "tvl24HourUsd": 75834977011.21634,
          "activeAddresses24Hour": 207052,
          "fees24HourUsd": 5970865.623038587
        }
      },
      {
        "id": "675b85dc-85a1-4096-9600-212e90a56e9a",
        "name": "Aave",
        "slug": "aave",
        "activity": {
          "tvl24HourUsd": 29943935339.394585,
          "activeAddresses24Hour": 6385,
          "fees24HourUsd": 2364765.883961379
        }
      },
      {
        "id": "3ee3418e-ab75-475c-b153-aeba3752478e",
        "name": "Lido DAO",
        "slug": "lido-dao",
        "activity": {
          "tvl24HourUsd": 23568580401.07076,
          "activeAddresses24Hour": 1083,
          "fees24HourUsd": 1970337.5536137987
        }
      },
      {
        "id": "e4fd40c6-4e95-4fbe-8d6b-e6e401793a8d",
        "name": "Morpho",
        "slug": "morpho-2",
        "activity": {
          "tvl24HourUsd": 14131509867.358997,
          "activeAddresses24Hour": 932,
          "fees24HourUsd": 793248.111185432
        }
      }
    ],
    "metadata": {
      "pageSize": 10,
      "page": 1,
      "totalRows": 214,
      "totalPages": 22
    }
  }
}

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

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

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