Hong Kong Monetary Authority Exchange Rate API

Official Hong Kong Monetary Authority rates for 31 Aug 2026: 1 USD = 7.839 HKD, 1 EUR = 9.0845 HKD. All 17 currencies published, history back to 1981. Free JSON API for tax, audits, and compliant invoicing.

Hong Kong flagHong Kong Monetary Authority official monthly exchange rates as JSON: 17 currencies against the HKD, history back to 1981. Latest table on every plan. Get your API key.

About Hong Kong Monetary Authority

The Hong Kong Monetary Authority is Hong Kong's central banking institution and operator of the Linked Exchange Rate System that pegs the Hong Kong dollar to the US dollar. Its open data API publishes daily Hong Kong dollar exchange rates for around 19 currencies.

Quick start

One request for the pair you need — USD to HKD at the official Hong Kong Monetary Authority rate:

curl "https://allratestoday.com/api/v1/central-bank/hkma/latest?source=USD&target=HKD" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

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

On paid plans, any historical date or a time series:

curl "https://allratestoday.com/api/v1/central-bank/hkma/history?source=USD&target=HKD&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-08-31)

Below is the current table from Hong Kong Monetary Authority, unmodified — what a call to /latest returns right now, with values HKD per 1 unit of each currency:

Download this table: Excel (.xlsx) CSV

Download history:
Choose currencies: USD
Excel (.xlsx) CSV

One row per currency per publication date. Up to one year per download. Billed as one API call per currency per month of data.

BaseQuoteTypeRate
AUD HKD reference 5.612
CAD HKD reference 5.6395
CHF HKD reference 9.691
CNY HKD reference 1.16635
EUR HKD reference 9.0845
GBP HKD reference 10.6145
IDR HKD reference 0.0004418
INR HKD reference 0.0825
JPY HKD reference 0.04903
KRW HKD reference 0.005721
MYR HKD reference 1.94685
PHP HKD reference 0.1285
SGD HKD reference 6.158
THB HKD reference 0.23695
TWD HKD reference 0.246
USD HKD reference 7.839
ZAR HKD reference 0.485

Node.js / TypeScript client

A dedicated zero-dependency npm package wraps these endpoints — hkma-exchange-rate:

npm install hkma-exchange-rate
import { getRate } from 'hkma-exchange-rate';

const pair = await getRate('USD', 'HKD', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

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

Full reference — installation, all four functions, response shapes, error codes: hkma-exchange-rate documentation.

Why use the official Hong Kong Monetary Authority rate?

When an auditor or tax office in Hong Kong asks which rate you used, "the HKD mid-market rate at 14:32" is not an answer — the official rate published by Hong Kong Monetary Authority for that date is. This API returns exactly those published figures, stamped with the bank's own rate_date; on weekends and holidays the most recent published table is returned, as compliance rules expect.

If a pair isn't in the bank's published table, the API computes it from that table (inverse or cross via HKD) and marks it "derived": true — published and computed values are never silently mixed.

Endpoints

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once a month, so caching a published table locally makes a small quota go far.

Frequently asked questions

Is there an API for Hong Kong Monetary Authority exchange rates?

Yes — this one. Official monthly HKD rates as clean JSON, latest table on every plan including free.

How often does Hong Kong Monetary Authority update its rates?

New tables land monthly — one official table per calendar month, published ahead of the month it applies to — the API picks each one up shortly after Hong Kong Monetary Authority publishes it (latest: 2026-08-31).

Is this the official published table?

Yes — the rows are Hong Kong Monetary Authority's published figures, untouched, with the original publication date attached. Pairs the bank didn't print are computed and flagged derived.

Hong Kong Monetary Authority rates, one API key

Latest table on every plan. History back to 1981 on paid plans. No credit card to start.

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