Конвертация BTN в CHF

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://rate-api.com/api/v1/pair/BTN/CHF?precision=6"

fetch('https://rate-api.com/api/v1/pair/BTN/CHF?precision=6', {
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
})
  .then((res) => res.json())
  .then((data) => console.log(`1 BTN = ${data.rate} CHF`));

import requests

res = requests.get(
    "https://rate-api.com/api/v1/pair/BTN/CHF?precision=6",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    timeout=10,
)
data = res.json()
print(f"1 BTN = {data['rate']} CHF")

<?php
$ch = curl_init('https://rate-api.com/api/v1/pair/BTN/CHF?precision=6');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ['Authorization: Bearer YOUR_API_KEY'],
]);
$data = json_decode(curl_exec($ch), true);
echo "1 BTN = {$data['rate']} CHF\n";

{
    "success": true,
    "pair": {
        "from": "BTN",
        "to": "CHF"
    },
    "rate": 0.008737,
    "timestamp": 1794344410,
    "date": "2026-11-10"
}