Central Bank of Chile Exchange Rate API: Official Dólar Observado as JSON

The Central Bank of Chile publishes the official exchange rates that accounting, tax, and customs practice in Chile 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 central-bank-of-chile-exchange-rate npm package.

Published a day ahead, on purpose

The dólar observado is computed from the previous day’s interbank trading and published one business day ahead of its value date — so tomorrow’s official rate exists today. Chilean law, tax rules and contracts reference it by value date, which is exactly how the API serves it. Alongside it comes the bank’s parities table: roughly 60 currencies quoted against the US dollar, from which CLP crosses resolve automatically.

Why official rates, not market rates

A live mid-market feed answers "what is USD/CLP 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 Central Bank of Chile’s published rates, and it never changes after publication.

Get the latest rates (REST)

curl "https://allratestoday.com/api/v1/central-bank/bcch/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 central-bank-of-chile-exchange-rate

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

// One pair at the official rate
const pair = await getRate('USD', 'CLP', { 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 'central-bank-of-chile-exchange-rate';

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

const series = await getHistory(
  { source: 'USD', target: 'CLP', 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 Central Bank of Chile does not print a pair directly, the API resolves it from the bank's published rates — an inverse, or a cross via CLP — 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 observado and parities series are loaded from January 2000 — through the 2008 crisis peak, the 2019 social-unrest spike past 800, and beyond. The bank’s own archive of the observado reaches back to 1982.

FAQ

Does the Central Bank of Chile 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 central-bank-of-chile-exchange-rate npm package. The latest table is free.

How do I get the official Chile 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.

Why does the API return a rate for tomorrow?

Because the bank publishes it today: the dólar observado for value date D is computed from day D-1 trading and released the evening before. That forward-dated value is the official rate for that date.