curl --request GET \
  --url https://api.messari.io/metrics/v1/markets \
  --header 'X-Messari-API-Key: <api-key>'

import requests

url = "https://api.messari.io/metrics/v1/markets"

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/v1/markets', 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/v1/markets",
  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/v1/markets"

	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/v1/markets")
  .header("X-Messari-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.messari.io/metrics/v1/markets")

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": [
    {
      "id": "6057-649-44",
      "baseAsset": {
        "id": "1e31218a-e44e-4285-820c-8282ee222035",
        "name": "Bitcoin",
        "slug": "bitcoin",
        "symbol": "BTC"
      },
      "baseAssetSector": "Cryptocurrency",
      "quoteAsset": {
        "id": "60dcd17b-00f3-49f8-907c-f390c2521c59",
        "name": "United States Dollar",
        "slug": "fedcoin",
        "symbol": "USD"
      },
      "quoteAssetSector": "",
      "exchange": {
        "id": "181f44f6-f9b7-4c11-9e44-7c7f803d808e",
        "name": "Coinbase",
        "slug": "coinbase"
      },
      "network": null,
      "sectors": [
        "Cryptocurrency"
      ],
      "firstTradeAt": "2014-12-01T06:00:00Z",
      "lastTradeAt": "2026-03-04T23:34:00Z",
      "isNewMarket": false,
      "isRecentlyListed": false,
      "liveness": "live",
      "metrics": {
        "exchangeVolumePercentage24h": 44.03,
        "latestPrice24hOpen": 68435.06,
        "latestPrice24hHigh": 74100,
        "latestPrice24hLow": 67391.17,
        "latestPrice24hClose": 72432.08,
        "premiumDiscount": -0.015,
        "volume24h": 1496297599.8,
        "tradeCount24h": 1219331
      }
    }
  ],
  "metadata": {
    "pageSize": 1,
    "page": 1,
    "totalRows": 742,
    "totalPages": 742
  }
}

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

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

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