# Free Currency and Finance APIs

Page: https://free-web-services.com/web-services/unit-convertors/

Free APIs for exchange rates, currency conversion, stock and crypto prices, economic indicators, payments and unit conversion. Use them to show prices in a visitor's currency, follow markets or add payments to your site; several exchange-rate APIs need no key at all.

## Subcategories

- [Crypto](https://free-web-services.com/web-services/unit-convertors/crypto/index.md): Cryptocurrency prices and market data
- [Finance](https://free-web-services.com/web-services/unit-convertors/fiinance/index.md): Financial APIs.

## Services

| Service | API key | Formats | Free use |
|---|---|---|---|
| [Alpha Vantage](https://free-web-services.com/web-services/unit-convertors/alpha-vantage.md) | Needed, free | JSON, CSV | Free with a free API key and a small daily request limit; premium plans for more requests. |
| [Bank of Canada Valet API](https://free-web-services.com/web-services/unit-convertors/bank-of-canada-valet-api.md) | Not needed | JSON, XML, CSV | Free, no key needed, with the Bank of Canada credited as the source. |
| [CurrencyFreaks API](https://free-web-services.com/web-services/unit-convertors/currencyfreaks-api.md) | Needed, free | JSON | Free with a free API key for 1,000 calls a month, with rates updated daily. |
| [ECB Data Portal API](https://free-web-services.com/web-services/unit-convertors/ecb-data-portal-api.md) | Not needed | JSON, XML, CSV | Free, no key needed; cite the ECB as the source. |
| [ExchangeRate-API (open access)](https://free-web-services.com/web-services/unit-convertors/exchangerate-api-open-access.md) | Not needed | JSON | Free, with attribution required; the keyed plans give more frequent updates, conversion endpoints and historical data. |
| [Finnhub](https://free-web-services.com/web-services/unit-convertors/finnhub.md) | Needed, free | JSON | Free plan with a free API key and a per-minute limit; paid plans for more data and markets. |
| [Frankfurter](https://free-web-services.com/web-services/unit-convertors/frankfurter.md) | Not needed | JSON | Free, no key needed and no usage limits. |
| [Free Currency Exchange Rates API (fawazahmed0)](https://free-web-services.com/web-services/unit-convertors/free-currency-exchange-rates-api-fawazahmed0.md) | Not needed | JSON | Free. |
| [Freecurrencyapi](https://free-web-services.com/web-services/unit-convertors/freecurrencyapi.md) | Needed, free | JSON | Free with a free API key for 1,000 requests a month and 10 a minute, for hobby and personal projects; commercial use needs a paid plan. |
| [geoPlugin Currency Converter](https://free-web-services.com/web-services/unit-convertors/geoplugin-currency-converter.md) | - | JSON, XML | - |
| [NBP Web API (National Bank of Poland)](https://free-web-services.com/web-services/unit-convertors/nbp-web-api.md) | Not needed | JSON, XML | Free, no key needed. |
| [Open Exchange Rates](https://free-web-services.com/web-services/unit-convertors/open-exchange-rates.md) | Needed, free | JSON | Free with a free API key, for 1,000 requests a month with hourly updated rates. |
| [PayPal REST API](https://free-web-services.com/web-services/unit-convertors/paypal-sdk.md) | Needed, free | JSON | Free to use; PayPal charges a fee per transaction. |
| [TempConvert (W3Schools)](https://free-web-services.com/web-services/unit-convertors/temp-convert.md) | Not needed | - | Free, no key needed. |
| [TimeAPI.io](https://free-web-services.com/web-services/unit-convertors/timeapi-io.md) | Not needed | JSON | Free, no key needed. |
| [VATcomply API](https://free-web-services.com/web-services/unit-convertors/vatcomply-api.md) | Not needed | JSON | Free, no key needed, up to 2 requests a second per IP address. |

## Questions

**Which free currency and finance APIs work without an API key?**  
Bank of Canada Valet API, ECB Data Portal API, ExchangeRate-API (open access), Frankfurter, Free Currency Exchange Rates API (fawazahmed0), NBP Web API (National Bank of Poland), TempConvert (W3Schools), TimeAPI.io and VATcomply API work without a key, according to their documentation. Most keyless services ask you to keep the number of requests reasonable, and some ask for a User-Agent that names your app.

**Are these currency and finance APIs really free?**  
The services here can be used without paying, at least on a free plan or free tier, often with limits such as a number of requests per day or non-commercial use only. The table above quotes what each service says about its free use; check the provider's own terms before you rely on it.

**How up to date is this list?**  
The address of every service is checked about once a week, and services that stop working or stop being free are removed. This list last changed on November 12th, 2026.