Free Official Exchange Rate Widget & Keyless API

Embed official central bank and tax authority exchange rates on any site with one line of HTML — no API key. Free forever with attribution: ECB, Bank of England, HMRC, Swiss customs and 33 more.

Live demo

This is the widget running on this page, showing the European Central Bank's published reference rate:

Embed it

Paste this where you want the rate to appear:

<div class="art-official-rate"
     data-bank="ecb"
     data-source="USD"
     data-target="EUR"></div>
<script async src="https://allratestoday.com/official-rates.js"></script>

Change data-bank to any covered source, and data-source/data-target to the pair you need. Add data-theme="dark" on a dark background.

The one condition

The widget renders a "Rates by AllRatesToday" link and does not let you remove it. That is the whole price of the endpoint: no key, no signup, no quota — just the link. Removing or hiding it is the one thing that is not permitted.

We are explicit about this because the alternative is a signup wall, and an official exchange rate is more useful to the web without one.

Or call it directly

The same data is available as keyless JSON, with CORS enabled, for one pair:

curl "https://allratestoday.com/api/open/central-bank/ecb?source=USD&target=EUR"

{
  "bank": "ecb",
  "rate_date": "2026-08-07",
  "source": "USD",
  "target": "EUR",
  "rate": 0.85704,
  "rate_type": "reference",
  "derived": false,
  "method": "published",
  "attribution": {
    "source": "Official rates published by ECB, served by AllRatesToday",
    "url": "https://allratestoday.com/central-bank-rates-api/ecb/",
    "terms": "Free to use with visible attribution linking to allratestoday.com"
  }
}

Or the source's whole published table:

curl "https://allratestoday.com/api/open/central-bank/hmrc"

Every response carries the publishing body's own rate_date, and anything computed rather than published is flagged derived with the method used — the distinction an auditor asks about.

What needs a key

The keyless endpoint serves the latest published table only. Historical dates, time series and publication calendars are on the full central bank API, which starts free at 300 requests a month — see pricing. That split is not arbitrary: the latest table is one cached object, while history is a database query per request.

Frequently asked questions

Do I need an API key?

No. This endpoint and widget are keyless and open to any site, on one condition: keep the visible "Rates by AllRatesToday" link the widget renders. That attribution is what pays for the endpoint.

What is the catch?

There is a real limit: this serves the latest published table only. Historical dates, time series and publication calendars need a free or paid API key, because those queries hit the database rather than a cached table.

How is this different from a normal currency widget?

Most widgets show a live market rate. This one shows the official published rate — the number a tax filing, customs declaration or audit is required to cite — and it always shows the publishing body's own publication date alongside it.

Which sources can I embed?

Any of the 35 central banks or the tax authorities: ecb, boe, fed, snb, boj, pboc and the rest, plus hmrc (UK monthly customs rates), ustreasury (quarterly reporting rates) and bazg (Swiss daily customs rates). Use the source code as data-bank.

Can I use it commercially?

Yes, on any site including commercial ones, as long as the attribution link stays visible and followable.

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