api.bitflyer.jp から、ビットコインのレートを取得するサンプルです。
python3,php7,node.js のサンプルです。

get_rate.py

#! /usr/bin/python
# -*- coding: utf-8 -*-
#
#	get_rate.py
#
#					Jun/25/2017
# --------------------------------------------------------------------
import sys
import requests

# --------------------------------------------------------------------
sys.stderr.write("*** 開始 ***\n")
url='https://api.bitflyer.jp/v1/ticker?product_code=BTC_JPY'
rr=requests.get(url)
dict=rr.json()
#
print('timestamp = ' + dict['timestamp'])
print('ltp = ' + str(dict['ltp']))
print('best_bid = ' + str(dict['best_bid']))
print('best_ask = ' + str(dict['best_ask']))
#
sys.stderr.write("*** 終了 ***\n")
# --------------------------------------------------------------------

get_rate.php

#! /usr/bin/php
<?php
// ------------------------------------------------------------------
//	get_rate.php
//
//					Jun/25/2017
//
// ------------------------------------------------------------------
function curl_get_proc ($url)
{
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt ($ch, CURLOPT_PROXY, "");

$data = curl_exec($ch);

curl_close($ch);

return $data;
}

// ------------------------------------------------------------------
fputs (STDERR,"*** 開始 ***\n");
$url_in='https://api.bitflyer.jp/v1/ticker?product_code=BTC_JPY';
$json_string = curl_get_proc ($url_in);
$dict_aa = json_decode ($json_string,true);
print "timestamp = " . $dict_aa['timestamp'] . "\n";
print "ltp = " . $dict_aa['ltp'] . "\n";
print "best_bid = " . $dict_aa['best_bid'] . "\n";
print "best_ask = " . $dict_aa['best_ask'] . "\n";
fputs (STDERR,"*** 終了 ***\n");
// ------------------------------------------------------------------

get_rate.js

#! /usr/bin/node
// ---------------------------------------------------------------
//	get_rate.js
//
//					Jun/25/2017
// ---------------------------------------------------------------
console.log ("*** 開始 ***")

var https = require('https')

const url_in='https://api.bitflyer.jp/v1/ticker?product_code=BTC_JPY'
https.get(url_in, function(res) {
	res.on('data', function(dd)
	{
	json_str = dd.toString()
	dict_aa = JSON.parse(json_str)
	console.log ("timestamp = " + dict_aa["timestamp"])
	console.log ("ltp = " + dict_aa["ltp"])
	console.log ("best_bid = " + dict_aa["best_bid"])
	console.log ("best_ask = " + dict_aa["best_ask"])
	console.log ("*** 終了 ***");
	})
	}).on('error', function(ee)
		{
		console.error(ee)
		})

// ---------------------------------------------------------------

次のバージョンで動作を確認しました。

$ python --version
Python 3.9.5

$ php --version
PHP 7.4.16 (cli) (built: Mar 23 2021 16:15:03) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.16, Copyright (c), by Zend Technologies

$ node --version
v14.14.0