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Free currency and finance APIs

7 of 7 returned the expected data at the last check, all without a key. Exchange rates published by central banks, plus public economic datasets.

7 APIs · no key · HTTPS

Build snapshot, not live. One verifier run on , from the machine that built this site. How we check

  • FrankfurterWorking

    Daily reference exchange rates from central banks, with history.

    api.frankfurter.devRuns in the browser179 msup 1 of 1 day

  • ExchangeRate-API (open access)Working

    Exchange rates for a base currency, refreshed once a day.

    open.er-api.comRuns in the browser172 msup 1 of 1 day

  • Currency API (fawazahmed0)Working

    Daily rates for fiat and crypto currencies, served as static files from a CDN.

    cdn.jsdelivr.netRuns in the browser75 msup 1 of 1 day

  • VATComplyWorking

    Exchange rates, EU VAT number validation and VAT rates.

    api.vatcomply.comRuns in the browser482 msup 1 of 1 day

  • NBP Web API (National Bank of Poland)Working

    Official exchange rate tables and gold prices published by the Polish central bank.

    api.nbp.plRuns in the browser933 msup 1 of 1 day

  • US Treasury Fiscal DataWorking

    US federal debt, interest rates, revenue and spending datasets.

    api.fiscaldata.treasury.govRuns in the browser777 msup 1 of 1 day

  • World Bank IndicatorsWorking

    Development indicators such as GDP, population and inflation by country and year.

    api.worldbank.orgRuns in the browser115 msup 1 of 1 day

Before you pick one

Free exchange-rate APIs publish daily reference rates, not the rate a bank or card will charge. Show the date next to any converted amount.

Open an API’s page to see the exact request we send, the answer it gave, and how many of the last 30 days it was up. If it is marked CORS you can run the request from the page itself.

Questions

Which free currency and finance APIs need no key?

All 7 listed here: Frankfurter, ExchangeRate-API (open access), Currency API (fawazahmed0), VATComply, NBP Web API (National Bank of Poland), US Treasury Fiscal Data, World Bank Indicators. Each answered our verifier without a key or account.

Which currency and finance APIs can I call from the browser?

In the Oct 3, 2026 run, 7 of 7 sent CORS headers: Frankfurter, ExchangeRate-API (open access), Currency API (fawazahmed0), VATComply, NBP Web API (National Bank of Poland), US Treasury Fiscal Data, World Bank Indicators.

Which one answered fastest?

Currency API (fawazahmed0), in 75 ms, in the Oct 3, 2026 run from our build machine. Latency depends on where you call from, so treat it as a rough guide.

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