ČSOB (Slovakia) Exchange Rate API: EUR Buy and Sell Rates as JSON

Československá obchodná banka is a Slovak bank in Belgium's KBC Group. Its kurzový lístok lists devízy (non-cash) and valuty (cash) rates against the euro for 16 currencies, with two lists a day. This guide shows how to read that board as JSON: what the rates mean, how they compare with the European Central Bank official rate and with other banks in Slovakia, and the calls that return them.

What the ČSOB SK board shows

• 16 currencies against the euro: AUD, CAD, CHF, CNY, CZK, DKK, GBP, HKD, HUF, JPY, NOK, PLN, RON, SEK, TRY and USD. Every value is EUR per 1 unit of the foreign currency.
• The devízy (non-cash) buy / sell pair. Slovak banks quote how much foreign currency 1 euro buys, with separate nákup (buy) and predaj (sell) rates for devízy (non-cash) and valuty (cash). The rates here are the devízy pair turned round to euros per 1 unit; the European Central Bank publishes one euro reference rate per business day, shown next to each row.
• USD on 15 November 2026: ČSOB SK bought at 0.8615 and sold at 0.9521 EUR, a spread of 9.99%. The European Central Bank official rate was 0.9048, so the bank's mid sat +0.22% from it.
• The bank's own timestamp. The page prints a last-updated stamp (13.11.2026 16:15 on the board above), returned as bank_updated_at next to our captured_at.
• Every day's board is kept permanently, from 13 November 2026. Read one past day with ?date=, or a range for one currency with the /history endpoint (paid plans).

Spreads across the board

On the 15 November 2026 board the tightest spreads were SEK (9.97%), NOK (9.97%), CAD (9.98%) and the widest GBP (9.99%), USD (9.99%), CHF (9.99%). Spread is (sell − buy) ÷ mid: what a round trip through the bank costs, before any fees. The API returns it on every row as spread_pct, so you can rank currencies or alert when a bank widens its board.

USD at ČSOB SK and other banks in Slovakia

USD on the 9 boards AllRatesToday reads in Slovakia, all captured on 15 November 2026 (the European Central Bank official rate was 0.9048):

ČSOB SK had the 9th narrowest USD spread of the 9. One call to /api/v1/bank-rates/sk returns every board in the table at once.

Get the board (REST)

You need an API key; the free key works. The full board:

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

What comes back (the 15 November 2026 board, first three rows):

{
  "bank": "csobsk",
  "name": "ČSOB (Slovakia)",
  "country": "sk",
  "quote_ccy": "EUR",
  "bank_updated_at": "13.11.2026 16:15",
  "basis": "Devízy (non-cash) buy / sell",
  "captured_at": "2026-11-15T11:37:23.540Z",
  "rates": [
    {"ccy":"AUD","buy":0.58493215,"sell":0.64641241,"mid":0.61567228,"spread_pct":9.986,"official":0.6139489194499017,"vs_official_pct":0.281},
    {"ccy":"CAD","buy":0.60532688,"sell":0.66889632,"mid":0.6371116,"spread_pct":9.978,"official":0.6345982992765579,"vs_official_pct":0.396},
    {"ccy":"CHF","buy":1.0293361,"sell":1.137527,"mid":1.0834316,"spread_pct":9.986,"official":1.0792143319663285,"vs_official_pct":0.391},
    … 13 more currencies
  ],
  "disclaimer": "…",
  "attribution": { … }
}

One currency, with the row fields at the top level:

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

{
  "bank": "csobsk",
  "name": "ČSOB (Slovakia)",
  "country": "sk",
  "quote_ccy": "EUR",
  "bank_updated_at": "13.11.2026 16:15",
  "basis": "Devízy (non-cash) buy / sell",
  "captured_at": "2026-11-15T11:37:23.540Z",
  "ccy": "USD",
  "buy": 0.86154907,
  "sell": 0.95210892,
  "mid": 0.906829,
  "spread_pct": 9.986,
  "official": 0.9048136083966704,
  "vs_official_pct": 0.223,
  "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 ČSOB (Slovakia) on its own website, collected by AllRatesToday",
    "bank_url": "https://www.csob.sk/o-nas/kurzovy-listok",
    "url": "https://allratestoday.com/bank-exchange-rate-api/sk/csobsk/",
    "terms": "Public pages that show the rates need a visible link to allratestoday.com"
  }
}

The board as it stood on a past day:

curl "https://allratestoday.com/api/v1/bank-rates/sk/csobsk?date=2026-11-13" \
  -H "Authorization: Bearer art_live_your_key"

One currency over a date range, one row per day (paid plans; add &format=csv, xml or xlsx for a file):

curl "https://allratestoday.com/api/v1/bank-rates/sk/csobsk/history?ccy=USD&from=2026-11-13&to=2026-11-15" \
  -H "Authorization: Bearer art_live_your_key"

JavaScript

npm install @allratestoday/sdk

import { AllRatesToday } from '@allratestoday/sdk';

const client = new AllRatesToday({ apiKey: 'art_live_your_key' });

// ČSOB (Slovakia)'s USD row
const r = await client.bankRates('sk', { bank: 'csobsk', ccy: 'USD' });
console.log(`ČSOB SK buys USD at ${r.buy}, sells at ${r.sell} EUR`);

// The board as it stood on a past day
const past = await client.bankRates('sk', { bank: 'csobsk', date: '2026-11-13' });
console.log(past.snapshot_date, past.rates.length);

Python

import requests

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

Board rate or official rate?

The European Central Bank rate is the one tax, accounting and customs rules in Slovakia name; nobody transacts at it. ČSOB SK's board is the price a customer actually gets. The API puts both on every row: official is the central bank's rate for the same currency and vs_official_pct is how far the bank's mid sits from it. Use the board to show customers a real price, compare banks for a remittance, or keep a dated record of what the bank quoted; use the European Central Bank endpoint when a rule asks for the official rate.

FAQ

Where do the ČSOB (Slovakia) rates come from?

From the bank's own public rates page (https://www.csob.sk/o-nas/kurzovy-listok), read hourly. AllRatesToday does not change the numbers: each row is the buy and sell price ČSOB SK shows, with the mid, the spread and the European Central Bank rate added.

Are these the official EUR exchange rates?

No. They are ČSOB SK's retail prices for customers. The official rate in Slovakia is the European Central Bank rate, which the API returns as official on each row where the central bank has one, and in full from the central-bank endpoint.

How often is the ČSOB SK board updated?

AllRatesToday reads the page every hour. The bank's own last-updated stamp is returned as bank_updated_at, so you can tell a fresh read of an unchanged board from a new board.

Can I get ČSOB SK rates for a past date?

Yes, from 13 November 2026 onward; every day's board is kept permanently. Add ?date=YYYY-MM-DD for one day: the response is the board captured that day, or the nearest earlier day within five days, with date_requested and snapshot_date added. For a range, /history?ccy=USD&from=…&to=… returns one row per day as JSON, CSV, XML or XLSX on paid plans.

Do I need an API key?

Yes. Commercial bank boards need an API key; any plan works, the free key included, and each call counts against the plan. Public pages or widgets that show the rates need a visible link to allratestoday.com.