curl --request GET \
  --url 'https://beaconcha.in/api/v1/epoch/{epoch}?apikey='

import requests

url = "https://beaconcha.in/api/v1/epoch/{epoch}?apikey="

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://beaconcha.in/api/v1/epoch/{epoch}?apikey=', 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://beaconcha.in/api/v1/epoch/{epoch}?apikey=",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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://beaconcha.in/api/v1/epoch/{epoch}?apikey="

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

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://beaconcha.in/api/v1/epoch/{epoch}?apikey=")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://beaconcha.in/api/v1/epoch/{epoch}?apikey=")

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

request = Net::HTTP::Get.new(url)

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

{
  "status": "OK",
  "data": {
    "epoch": 15000,
    "ts": "2022-09-29T04:00:23Z",
    "finalized": true,
    "validatorscount": 436943,
    "averagevalidatorbalance": 33827474537,
    "totalvalidatorbalance": 14780678206789428,
    "globalparticipationrate": 0.9885170459747314,
    "eligibleether": 13982056000000000,
    "votedether": 13821500000000000,
    "blockscount": 32,
    "proposedblocks": 31,
    "missedblocks": 1,
    "orphanedblocks": 0,
    "scheduledblocks": 0,
    "attestationscount": 3458,
    "attesterslashingscount": 0,
    "proposerslashingscount": 1,
    "depositscount": 12,
    "withdrawalcount": 16,
    "voluntaryexitscount": 2,
    "rewards_exported": true
  }
}

{
  "status": "ERROR: invalid epoch parameter",
  "data": null
}

{
  "status": "ERROR: internal server error",
  "data": null
}