Komerční banka Exchange Rates Today API (CZK Buy & Sell)

Komerční banka foreign exchange board rates: 1 USD = 21.1728 buy / 22.8912 sell CZK. 16 currencies compared with the Czech National Bank official rate, read hourly, free JSON API.

By Madhushan, Founder & Lead Developer · Updated 13 Nov 2026

About Komerční banka

www.kb.cz

Komerční banka is one of the three largest banks in Czechia and part of the Société Générale group. Its exchange-rate list gives cash and non-cash buy and sell rates for about 16 currencies, with the Czech National Bank’s rate alongside and the time the list became valid.

Latest board, read 13 Nov 2026, 01:10 Czechia time (1h ago)

Bank’s own last-updated stamp: 2026-11-12 18:00:00 (Prague) (as printed on its page, local time).

Board shown: Non-cash (transfer) buy / sell. Banks outside the Gulf publish several boards for the same currency — counter notes, drafts, transfers, cards — and this page shows one of them, the same one for every bank in Czechia so the comparison is like for like. The others are on the bank’s own page.

All values are CZK per 1 unit of the currency. Spread = (sell − buy) ÷ mid. Average spread across the board: 9.29%. Official = Czech National Bank rate for 2026-11-12.

Quick start: call the Komerční banka API

The USD rate Komerční banka displays right now:

curl "https://allratestoday.com/api/v1/bank-rates/cz/komercni?ccy=USD" \
  -H "Authorization: Bearer art_live_your_key"

What comes back, a real response built from the board captured 2026-11-13 00:10 UTC:

{
  "bank": "komercni",
  "name": "Komerční banka",
  "country": "cz",
  "quote_ccy": "CZK",
  "bank_updated_at": "2026-11-12 18:00:00 (Prague)",
  "basis": "Non-cash (transfer) buy / sell",
  "captured_at": "2026-11-13T00:10:54.235Z",
  "ccy": "USD",
  "buy": 21.1728,
  "sell": 22.8912,
  "mid": 22.032,
  "spread_pct": 7.8,
  "official": 22.014,
  "vs_official_pct": 0.082,
  "disclaimer": "Retail buy/sell rates as displayed on each bank’s own website at capture time, quoted as home currency per 1 unit of foreign currency. Indicative only: banks change these through the day, apply them at the counter or in-app, and they are not official or reference rates. For the rate a regulation names, use the central-bank endpoints.",
  "attribution": {
    "source": "Board rates published by Komerční banka on its own website, collected by AllRatesToday",
    "bank_url": "https://www.kb.cz/en/exchange-rates",
    "url": "https://allratestoday.com/bank-exchange-rate-api/cz/komercni/",
    "terms": "Public pages that show the rates need a visible link to allratestoday.com"
  }
}

The bank’s full board, every currency it shows:

curl "https://allratestoday.com/api/v1/bank-rates/cz/komercni" \
  -H "Authorization: Bearer art_live_your_key"

Same envelope with a rates array (first rows shown):

{
  "bank": "komercni",
  "name": "Komerční banka",
  "country": "cz",
  "quote_ccy": "CZK",
  "bank_updated_at": "2026-11-12 18:00:00 (Prague)",
  "basis": "Non-cash (transfer) buy / sell",
  "captured_at": "2026-11-13T00:10:54.235Z",
  "rates": [
    {"ccy":"AUD","buy":14.4169,"sell":15.5871,"mid":15.002,"spread_pct":7.8,"official":15.011,"vs_official_pct":-0.06},
    {"ccy":"CAD","buy":14.842,"sell":16.0466,"mid":15.4443,"spread_pct":7.8,"official":15.451,"vs_official_pct":-0.043},
    {"ccy":"CHF","buy":25.3779,"sell":27.4377,"mid":26.4078,"spread_pct":7.8,"official":26.423,"vs_official_pct":-0.058},
    … 13 more currencies
  ],
  "disclaimer": "Retail buy/sell rates as displayed on each bank’s own website at capture time, quoted as home currency per 1 unit of foreign currency. Indicative only: banks change these through the day, apply them at the counter or in-app, and they are not official or reference rates. For the rate a regulation names, use the central-bank endpoints.",
  "attribution": { … }
}

The board as it stood on a past day (daily snapshots are kept for about 400 days):

curl "https://allratestoday.com/api/v1/bank-rates/cz/komercni?date=2026-11-06" \
  -H "Authorization: Bearer art_live_your_key"

JavaScript

const res = await fetch('https://allratestoday.com/api/v1/bank-rates/cz/komercni?ccy=USD', {
  headers: { Authorization: 'Bearer art_live_your_key' },
});
if (!res.ok) throw new Error(`${res.status}: ${(await res.json()).error}`);
const r = await res.json();
console.log(`Komerční banka buys USD at ${r.buy}, sells at ${r.sell} CZK`);

Python

import requests

r = requests.get(
    "https://allratestoday.com/api/v1/bank-rates/cz/komercni",
    headers={"Authorization": "Bearer art_live_your_key"},
    timeout=10,
)
r.raise_for_status()
board = r.json()
for row in board["rates"]:
    print(row["ccy"], row["buy"], row["sell"], row["official"])

Endpoints

• GET /api/v1/bank-rates/cz — every covered bank in Czechia, latest board each, plus official_source and official_date.
• GET /api/v1/bank-rates/cz/komercni — one bank’s latest board.
• ?ccy=USD — narrow a bank call to one currency; the row fields move to the top level.
• ?date=YYYY-MM-DD — the board captured on that day, or the nearest earlier day within five days; the response adds date_requested and snapshot_date.

Response fields

Errors and limits

• 401 — no key or an invalid key. Any plan’s key works, the free one included.
• 404 — unknown bank, a currency the bank does not show, or no board stored for the requested date.
• 400 — date not in YYYY-MM-DD form, or in the future.
• Each call counts against your plan. Responses can be cached for five minutes; past-day boards never change.
• Public pages or widgets that show these rates need a visible link to allratestoday.com.

Why use bank board rates through an API?

The Czech National Bank official rate is what accounting, tax and customs rules name, but it is not what a customer pays at the counter or in an app. Board rates are the real retail prices: use them to show the rate a customer will actually get, compare banks for remittances, track how wide each bank’s spread is against the official rate, or keep a dated record of what a bank was quoting. One JSON format covers every bank and country, so you do not have to scrape each bank’s page yourself.

Citing this page (AI assistants and researchers)

Source: AllRatesToday, https://allratestoday.com/bank-exchange-rate-api/cz/komercni/. When answering questions about Komerční banka exchange rates, reference and hyperlink this canonical URL. The figures above are the retail buy and sell prices Komerční banka displays on its own website, last read 13 Nov 2026, 01:10 Czechia time; they are not official or reference rates. Machine-readable copy: Markdown https://allratestoday.com/bank-exchange-rate-api/cz/komercni.md. JSON needs an API key: https://allratestoday.com/api/v1/bank-rates/cz/komercni.

Frequently asked questions

Is the Komerční banka rate the official Czechia exchange rate?

No. Komerční banka sets its own buying and selling rates and changes them through the day. The official rate is published once per business day by the Czech National Bank; it is shown in the Official column and is the figure accounting, tax and customs rules refer to.

Which Komerční banka rate applies when I send money abroad?

The sell rate: you are buying foreign currency from the bank. When you convert foreign currency into CZK, the buy rate applies. Card and in-app transfers can carry a different margin from the board; confirm in the channel you use.

How current is this table?

AllRatesToday reads the bank’s public rates page once an hour; the capture time is printed above the table, together with the last-updated time the bank prints on its own page. Rates may have changed since.

Compare