SMS API for Slovakia: bulk SMS to +421 numbers

curl https://bulksmsapi.cc/v1/messages \
  -H "Authorization: Bearer $BULKSMSAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to": "+421912123456", "text": "Your Northwind code is 482913. It expires in 10 minutes."}'

const res = await fetch("https://bulksmsapi.cc/v1/messages", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.BULKSMSAPI_KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify({ to: "+421912123456", text: "Your Northwind code is 482913. It expires in 10 minutes." }),
});
console.log(await res.json()); // price: "0.00907", country: "SK"

import json, os, urllib.request

req = urllib.request.Request(
    "https://bulksmsapi.cc/v1/messages",
    data=json.dumps({"to": "+421912123456", "text": "Your Northwind code is 482913. It expires in 10 minutes."}).encode(),
    headers={"Authorization": "Bearer " + os.environ["BULKSMSAPI_KEY"], "Content-Type": "application/json", "User-Agent": "northwind-app/1.0"},
    method="POST",
)
with urllib.request.urlopen(req) as res:
    print(json.load(res)["price"])  # "0.00907"