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

import requests

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

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/tcg/metrics', 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/tcg/metrics",
  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/tcg/metrics"

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

require 'uri'
require 'net/http'

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

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": {
    "datasets": [
      {
        "slug": "overview",
        "granularities": [
          "1d"
        ],
        "metrics": [
          {
            "name": "Timestamp",
            "slug": "time",
            "description": "Timestamp of the data point.",
            "is_timestamp": true
          },
          {
            "name": "Gross Revenue USD",
            "slug": "grossRevenueUsd",
            "description": "Gross platform revenue in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Net Revenue USD",
            "slug": "netRevenueUsd",
            "description": "Net platform revenue in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Misc Revenue USD",
            "slug": "miscRevenueUsd",
            "description": "Miscellaneous revenue in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Buyback Expense USD",
            "slug": "buybackExpenseUsd",
            "description": "Card buyback expense in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Referral Expense USD",
            "slug": "referralExpenseUsd",
            "description": "Referral expense in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "GMV USD",
            "slug": "gmvUsd",
            "description": "Gross merchandise value in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Volume incl. Buybacks USD",
            "slug": "volumeInclBuybackUsd",
            "description": "Volume including platform buybacks in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Gacha Spend USD",
            "slug": "gachaSpendUsd",
            "description": "Net gacha (pack-opening) spend in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Credit Card Spend USD",
            "slug": "creditCardSpendUsd",
            "description": "Credit-card spend in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "New DAU",
            "slug": "dauNew",
            "description": "New daily active users. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Recurring DAU",
            "slug": "dauRecurring",
            "description": "Recurring daily active users. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Total DAU",
            "slug": "dauTotal",
            "description": "Total daily active users. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Marketplace Volume USD",
            "slug": "marketplaceVolumeUsd",
            "description": "Secondary-marketplace volume in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Organic Volume USD",
            "slug": "organicVolumeUsd",
            "description": "Marketplace volume excluding buybacks in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Buyback Volume USD",
            "slug": "buybackVolumeUsd",
            "description": "Marketplace buyback volume in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Sales Count",
            "slug": "salesCount",
            "description": "Marketplace sales count. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Unique Buyers",
            "slug": "uniqueBuyers",
            "description": "Unique marketplace buyers. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Top Sale USD",
            "slug": "topSaleUsd",
            "description": "Largest single sale of the day in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Marketplace Fees USD",
            "slug": "marketplaceFeesUsd",
            "description": "Marketplace fees in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Packs Opened",
            "slug": "packsOpened",
            "description": "Gacha packs opened, summed across tiers. Sourced from Blockworks Research.",
            "is_timestamp": false
          },
          {
            "name": "Gross Gacha Spend USD",
            "slug": "grossGachaSpendUsd",
            "description": "Gross gacha spend, summed across tiers, in USD. Sourced from Blockworks Research.",
            "is_timestamp": false
          }
        ]
      }
    ]
  }
}

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

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

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