---
title: "KB Kookmin Bank Exchange Rate API: KRW Buy and Sell Rates as JSON"
description: "KB Kookmin Bank's remittance receive / send (telegraphic transfer) rates for 49 currencies against the South Korean won, read hourly from the bank's own page and served as JSON with the Bank of Korea official rate alongside. REST, JavaScript and Python examples."
canonical: https://allratestoday.com/blog/kb-kookmin-bank-exchange-rate-api/
source: AllRatesToday (https://allratestoday.com/) — Markdown mirror of the page above; index of all pages at https://allratestoday.com/llms.txt
generated: 2026-11-13T18:12:17.663Z
---

KB Kookmin Bank is South Korea’s largest commercial bank by assets and the core of KB Financial Group. Its exchange-rate page lists base, remittance send and receive, and cash rates for about 57 currencies, re-posted many times each business day. This guide shows how to read that board as JSON: what the rates mean, how they compare with the Bank of Korea official rate and with other banks in South Korea, and the calls that return them.

## What the KB Kookmin board shows

- **49 currencies against the South Korean won**: AED, AUD, BDT, BHD, BND, CAD, CHF, CLP, CNY, CZK, DKK, EGP, ETB, EUR, FJD, GBP, HKD, HUF, IDR, ILS, INR, JOD, JPY, KES, KWD, KZT, LKR, LYD, MOP, MXN, MYR, NOK, NPR, NZD, OMR, PHP, PKR, PLN, RON, RUB, SAR, SEK, SGD, THB, TRY, TWD, USD, VND and ZAR. Every value is KRW per 1 unit of the foreign currency.
- **The remittance receive / send (telegraphic transfer) pair.** Korean banks re-post their boards many times a day (Hana Bank numbers each notice) around a base rate (매매기준율) derived from the Seoul interbank market. Each board has cash, remittance and cheque columns; the pair here is remittance receive and send, the rates an incoming or outgoing transfer uses. Yen, rupiah and dong are quoted per 100 units by the bank and are shown here per 1.
- **USD on 13 November 2026**: KB Kookmin bought at 1323.2 and sold at 1349 KRW, a spread of 1.93%. The Bank of Korea official rate was 1332.4, so the bank's mid sat +0.28% from it.
- **The bank's own timestamp.** The page prints a last-updated stamp (`2026-11-13 22:35:38 (Seoul), notice 418` 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, the day collection started.** Read one past day with `?date=`, or a range for one currency with the `/history` endpoint (paid plans).

## Spreads across the board

On the 13 November 2026 board the tightest spreads were CLP (1.49%), PKR (1.66%), NPR (1.80%) and the widest SGD (2.00%), SAR (2.00%), OMR (2.00%). 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 KB Kookmin and other banks in South Korea

USD on the 3 boards AllRatesToday reads in South Korea, all captured on 13 November 2026 (the Bank of Korea official rate was 1332.4):

| Bank | Buy | Sell | Spread | Mid vs official |
| --- | --- | --- | --- | --- |
| Hana Bank | 1323.3 | 1349.3 | 1.95% | +0.29% |
| **KB Kookmin Bank** | 1323.2 | 1349 | 1.93% | +0.28% |
| Woori Bank | 1324.6 | 1350.4 | 1.93% | +0.38% |

KB Kookmin had the 2nd narrowest USD spread of the 3. One call to `/api/v1/bank-rates/kr` returns every board in the table at once.

## Get the board (REST)

You need an API key; the [free key](https://allratestoday.com/register/) works. The full board:

```
curl "https://allratestoday.com/api/v1/bank-rates/kr/kbstar" \
  -H "Authorization: Bearer art_live_your_key"
```

What comes back (the 13 November 2026 board, first three rows):

```
{
  "bank": "kbstar",
  "name": "KB Kookmin Bank",
  "country": "kr",
  "quote_ccy": "KRW",
  "bank_updated_at": "2026-11-13 22:35:38 (Seoul), notice 418",
  "basis": "Remittance receive / send (telegraphic transfer)",
  "captured_at": "2026-11-13T13:36:58.744Z",
  "rates": [
    {"ccy":"AED","buy":360.12,"sell":367.38,"mid":363.75,"spread_pct":1.996,"official":362.77,"vs_official_pct":0.27},
    {"ccy":"AUD","buy":899.47,"sell":917.63,"mid":908.55,"spread_pct":1.999,"official":907.1,"vs_official_pct":0.16},
    {"ccy":"BDT","buy":10.64,"sell":10.84,"mid":10.74,"spread_pct":1.862,"official":10.71,"vs_official_pct":0.28},
    … 46 more currencies
  ],
  "disclaimer": "…",
  "attribution": { … }
}
```

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

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

```
{
  "bank": "kbstar",
  "name": "KB Kookmin Bank",
  "country": "kr",
  "quote_ccy": "KRW",
  "bank_updated_at": "2026-11-13 22:35:38 (Seoul), notice 418",
  "basis": "Remittance receive / send (telegraphic transfer)",
  "captured_at": "2026-11-13T13:36:58.744Z",
  "ccy": "USD",
  "buy": 1323.2,
  "sell": 1349,
  "mid": 1336.1,
  "spread_pct": 1.931,
  "official": 1332.4,
  "vs_official_pct": 0.278,
  "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 KB Kookmin Bank on its own website, collected by AllRatesToday",
    "bank_url": "https://obank.kbstar.com/quics?page=C101423",
    "url": "https://allratestoday.com/bank-exchange-rate-api/kr/kbstar/",
    "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/kr/kbstar?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/kr/kbstar/history?ccy=USD&from=2026-11-13&to=2026-11-13" \
  -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' });

// KB Kookmin Bank's USD row
const r = await client.bankRates('kr', { bank: 'kbstar', ccy: 'USD' });
console.log(`KB Kookmin buys USD at ${r.buy}, sells at ${r.sell} KRW`);

// The board as it stood on a past day
const past = await client.bankRates('kr', { bank: 'kbstar', 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/kr/kbstar",
    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 Bank of Korea rate is the one tax, accounting and customs rules in South Korea name; nobody transacts at it. KB Kookmin'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 [Bank of Korea endpoint](https://allratestoday.com/central-bank-rates-api/bok/) when a rule asks for the official rate.

## FAQ

### Where do the KB Kookmin Bank rates come from?

From the bank's own public rates page (https://obank.kbstar.com/quics?page=C101423), read hourly. AllRatesToday does not change the numbers: each row is the buy and sell price KB Kookmin shows, with the mid, the spread and the Bank of Korea rate added.

### Are these the official KRW exchange rates?

No. They are KB Kookmin's retail prices for customers. The official rate in South Korea is the Bank of Korea 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 KB Kookmin 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 KB Kookmin 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.

## KB Kookmin Bank rates, as JSON

Free API key, hourly board captures, the official rate alongside.

 [Get your free API key](https://allratestoday.com/register/)

## Related

- [KB Kookmin Bank live board rates](https://allratestoday.com/bank-exchange-rate-api/kr/kbstar/)
- [All banks in South Korea side by side](https://allratestoday.com/bank-exchange-rate-api/kr/)
- [Bank of Korea official rates API](https://allratestoday.com/central-bank-rates-api/bok/)
- [Hana Bank exchange rate API guide](https://allratestoday.com/blog/hana-bank-exchange-rate-api/)
- [Woori Bank exchange rate API guide](https://allratestoday.com/blog/woori-bank-exchange-rate-api/)
- [Commercial bank rates API: every bank and country](https://allratestoday.com/bank-exchange-rate-api/)