curl --request GET \
  --url https://api.cryptorank.io/v3/global/altcoin-index \
  --header 'X-Api-Key: <api-key>'

import requests

url = "https://api.cryptorank.io/v3/global/altcoin-index"

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

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

print(response.text)

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

fetch('https://api.cryptorank.io/v3/global/altcoin-index', 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.cryptorank.io/v3/global/altcoin-index",
  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-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.cryptorank.io/v3/global/altcoin-index"

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

	req.Header.Add("X-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.cryptorank.io/v3/global/altcoin-index")
  .header("X-Api-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cryptorank.io/v3/global/altcoin-index")

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

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

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

{
  "data": {
    "currentValue": 71,
    "classification": "Altcoin Season",
    "yesterdayValue": 68,
    "lastWeekValue": 55,
    "lastMonthValue": 42,
    "yearlyHighValue": 89,
    "yearlyHighDate": "2025-11-15T00:00:00.000Z",
    "yearlyLowValue": 12,
    "yearlyLowDate": "2025-03-10T00:00:00.000Z"
  },
  "status": {
    "usedCredits": 1,
    "timestamp": 1780000000000
  }
}

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Validation failed",
    "status": 400
  }
}

{
  "error": {
    "code": "API_KEY_MISSING",
    "message": "API key is missing",
    "status": 401
  }
}

{
  "error": {
    "code": "NO_ACTIVE_SUBSCRIPTION",
    "message": "No active subscription found",
    "status": 403
  }
}

{
  "error": {
    "code": "RATE_LIMIT_EXCEEDED",
    "message": "Rate limit exceeded",
    "status": 429
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error",
    "status": 500
  }
}