BNA Exchange Rate API: Official Angolan Kwanza Rates as JSON

The National Bank of Angola publishes the official exchange rates that accounting, tax, and customs practice in Angola reference — published official rates, not moving market prices. This guide shows how to pull them as JSON: via a REST endpoint or the zero-dependency bna-exchange-rate npm package.

The taxa de referência behind an oil economy

The BNA’s daily taxa de referência anchors pricing in one of Africa’s largest oil exporters — import contracts, repatriation accounting and the parallel-market spread all key off it. The board covers roughly 60 currencies with mid, buying and selling values, and the API serves it as clean JSON.

Why official rates, not market rates

A live mid-market feed answers "what is USD/AOA trading at right now?" — the right tool for checkouts and dashboards. But accountants, auditors, and tax authorities ask a different question: "which rate were you required to use for this date?" That answer comes from the National Bank of Angola’s published rates, and it never changes after publication.

Get the latest rates (REST)

curl "https://allratestoday.com/api/v1/central-bank/bna/latest" \
  -H "Authorization: Bearer YOUR_API_KEY"

The response is the bank's most recent published table — every rate and the publication date. The latest rates are available on every plan, including the free tier (300 requests/month, no credit card).

The npm SDK

npm install bna-exchange-rate

import { getRate, getLatestRates } from 'bna-exchange-rate';

// One pair at the official rate
const pair = await getRate('USD', 'AOA', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

// The bank's full published table
const table = await getLatestRates({ apiKey: 'art_live_...' });
console.log(table.rate_date, table.rates.length);

Zero dependencies, TypeScript types included, and it runs anywhere fetch exists — Node 18+, Bun, Deno, and edge runtimes.

Historical rates for an invoice date

import { getRatesForDate, getHistory } from 'bna-exchange-rate';

const day = await getRatesForDate('2026-08-18', { apiKey: 'art_live_...' });

const series = await getHistory(
  { source: 'USD', target: 'AOA', from: '2026-01-01' },
  { apiKey: 'art_live_...' }
);

Historical dates and time series need a paid plan; the latest rates stay free.

Published vs derived pairs

If the National Bank of Angola does not print a pair directly, the API resolves it from the bank's published rates — an inverse, or a cross via AOA — and flags it derived: true with the method used. Official and computed values are never silently mixed, which is exactly the distinction an auditor will ask about.

The archive

The archive reaches back to the last days of 1998 — effectively the whole life of the reformed kwanza, including the 2018–2019 float that took USD/AOA from 166 to over 500, and the 2023 devaluation past 800.

FAQ

Does the National Bank of Angola have an official exchange rate API?

The bank publishes its official rates on its own site, and AllRatesToday serves the same published rates as clean JSON via REST or the bna-exchange-rate npm package. The latest table is free.

How do I get the official Angola exchange rate for a past date?

The rates-for-date endpoint returns the official table for any archived date; non-publication days resolve to the most recent published date and are flagged, so audit trails stay honest. Historical dates require a paid plan; latest rates are free.

What do the three rate types mean for the kwanza?

Médio is the mid reference (rate_type "reference"); compra and venda ("buy"/"sell") are the reference buying and selling sides. For most majors the spread is a few kwanzas around the mid.