Banco de la Nación Argentina Exchange Rate API: ARS Buy and Sell Rates as JSON

Banco de la Nación Argentina is Argentina’s largest bank and is owned by the state. Its personal-banking page lists cash-note prices for three currencies and transfer (divisas) buying and selling prices for eleven currencies, some quoted per 100 units. This guide shows how to read that board as JSON: what the rates mean, how they compare with the Banco Central de la República Argentina official rate and with other banks in Argentina, and the calls that return them.

What the Banco Nación board shows

• 11 currencies against the Argentine peso: AUD, CAD, CHF, CNY, DKK, EUR, GBP, JPY, NOK, SEK and USD. Every value is ARS per 1 unit of the foreign currency.
• The divisas (transfer) buy / sell, wholesale close pair. Argentine banks set their own retail buy and sell for the dollar on top of the wholesale rate, and the spread is several percent. The Banco Central de la República Argentina publishes the wholesale reference rate. The Banco Central de la República Argentina official rate is shown next to each row.
• USD on 15 November 2026: Banco Nación bought at 1534.5 and sold at 1543.5 ARS, a spread of 0.58%. The Banco Central de la República Argentina official rate was 1543.5, so the bank's mid sat -0.29% from it.
• The bank's own timestamp. The page prints a last-updated stamp (13/11/2026 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 USD (0.58%), CHF (0.72%), CAD (0.73%) and the widest CNY (4.88%), SEK (1.59%), NOK (1.52%). 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 Banco Nación and other banks in Argentina

USD on the 8 boards AllRatesToday reads in Argentina, all captured on 15 November 2026 (the Banco Central de la República Argentina official rate was 1543.5):

Banco Nación had the narrowest USD spread of the 8. One call to /api/v1/bank-rates/ar 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/ar/bnaar" \
  -H "Authorization: Bearer art_live_your_key"

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

{
  "bank": "bnaar",
  "name": "Banco de la Nación Argentina",
  "country": "ar",
  "quote_ccy": "ARS",
  "bank_updated_at": "13/11/2026",
  "basis": "Divisas (transfer) buy / sell, wholesale close",
  "captured_at": "2026-11-15T11:46:25.212Z",
  "rates": [
    {"ccy":"AUD","buy":1037.9358,"sell":1047.1104,"mid":1042.5231,"spread_pct":0.88,"official":1045.8756,"vs_official_pct":-0.321},
    {"ccy":"CAD","buy":1075.327475,"sell":1083.251101,"mid":1079.2893,"spread_pct":0.734,"official":1082.018927,"vs_official_pct":-0.252},
    {"ccy":"CHF","buy":1826.913867,"sell":1840.112977,"mid":1833.5134,"spread_pct":0.72,"official":1838.594401,"vs_official_pct":-0.276},
    … 8 more currencies
  ],
  "disclaimer": "…",
  "attribution": { … }
}

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

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

{
  "bank": "bnaar",
  "name": "Banco de la Nación Argentina",
  "country": "ar",
  "quote_ccy": "ARS",
  "bank_updated_at": "13/11/2026",
  "basis": "Divisas (transfer) buy / sell, wholesale close",
  "captured_at": "2026-11-15T11:46:25.212Z",
  "ccy": "USD",
  "buy": 1534.5,
  "sell": 1543.5,
  "mid": 1539,
  "spread_pct": 0.585,
  "official": 1543.5,
  "vs_official_pct": -0.292,
  "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 Banco de la Nación Argentina on its own website, collected by AllRatesToday",
    "bank_url": "https://www.bna.com.ar/Personas",
    "url": "https://allratestoday.com/bank-exchange-rate-api/ar/bnaar/",
    "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/ar/bnaar?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/ar/bnaar/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' });

// Banco de la Nación Argentina's USD row
const r = await client.bankRates('ar', { bank: 'bnaar', ccy: 'USD' });
console.log(`Banco Nación buys USD at ${r.buy}, sells at ${r.sell} ARS`);

// The board as it stood on a past day
const past = await client.bankRates('ar', { bank: 'bnaar', 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/ar/bnaar",
    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 Banco Central de la República Argentina rate is the one tax, accounting and customs rules in Argentina name; nobody transacts at it. Banco Nación'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 Banco Central de la República Argentina endpoint when a rule asks for the official rate.

FAQ

Where do the Banco de la Nación Argentina rates come from?

From the bank's own public rates page (https://www.bna.com.ar/Personas), read hourly. AllRatesToday does not change the numbers: each row is the buy and sell price Banco Nación shows, with the mid, the spread and the Banco Central de la República Argentina rate added.

Are these the official ARS exchange rates?

No. They are Banco Nación's retail prices for customers. The official rate in Argentina is the Banco Central de la República Argentina 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 Banco Nación 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 Banco Nación 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.