Bank of Ghana Exchange Rate API: Official GHS Interbank Rates as JSON

The Bank of Ghana publishes the official exchange rates that accounting, tax, and customs rules in Ghana 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 bank-of-ghana-exchange-rate npm package.

What the BoG publishes

• 14 currencies against the cedi — buying, selling, and mid rates computed from actual interbank trades.
• History back to July 2007 — the full record of the redenominated cedi, queryable by exact date or as a time series.
• The bank's own publication date on every response, so a rate is always citable.
• No gaps to trip over — weekends and Ghanaian holidays resolve to the most recent published rates and are flagged explicitly.

The USD/GHS interbank mid rate is the anchor: the Ghana Revenue Authority, banks, and businesses pricing in cedis all reference the BoG print.

Why official rates, not market rates

A live mid-market feed answers "what is USD/GHS 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 Bank of Ghana's published rates, and it never changes after publication.

Get the latest rates (REST)

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

The response is the bank's most recent published data — 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 bank-of-ghana-exchange-rate

import { getRate, getLatestRates } from 'bank-of-ghana-exchange-rate';

// One pair at the official BoG rate
const pair = await getRate('USD', 'GHS', { 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 'bank-of-ghana-exchange-rate';

// The official rates for an invoice date — non-publication days return
// the most recent published date, flagged via published_on_requested_date.
const day = await getRatesForDate('2026-06-30', { apiKey: 'art_live_...' });

// Time series for one pair
const series = await getHistory(
  { source: 'USD', target: 'GHS', 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 BoG does not print a pair directly, the API resolves it from the bank's published rates — an inverse, or a cross rate via GHS — 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 full life of the new cedi

The series starts in July 2007 — the redenomination that struck four zeros off the old cedi — at 0.92 per dollar, and runs through the long depreciation past 15 and the 2023–24 stabilisation. For invoice-date lookups and audits it is the official record.

FAQ

Does the Bank of Ghana have an official exchange rate API?

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

How often do Bank of Ghana rates update?

Once per business day, computed from the day's interbank trades. These are published official rates, not moving market prices — every API response carries the publication date so you can cite it.

Can I get the BoG rate for a past date, like an invoice date?

Yes. The /central-bank/bog/rates-for-date endpoint returns the official rates for any archived date. Non-publication days resolve to the most recent published date and are flagged, so your audit trail stays honest. Historical dates require a paid plan; latest rates are free.