Currency Exchange APIs

Currency rates and conversion

15 APIs in this category · last checked 2 October 2026
15
APIs listed
7
need no API key (47%)
0
CORS enabled (0%)
15
HTTPS (100%)

This directory lists 15 currency exchange APIs. Use the filters below to narrow by authentication, HTTPS support and CORS. Every entry shows whether it needs authentication, serves over HTTPS and allows cross-origin requests, so you can pick one that fits your stack before you read a single doc page.

Showing 15 of 15 APIs

1Forge

Live and historical quotes for forex pairs and precious metals built for trading apps, free access needs a registered API key.

Auth: apiKey HTTPS CORS: Unknown

CurrencyFreaks

Real-time and historical exchange rates for 160+ currencies plus crypto, with a free plan capped at 1,000 calls per month and no card needed.

Auth: apiKey HTTPS CORS: Unknown

Bank of Russia

Official daily and historical currency exchange rates published by the Central Bank of Russia in XML format, free and needs no API key.

Auth: No HTTPS CORS: Unknown

Czech National Bank

Official daily foreign exchange rates for the Czech koruna against 28 currencies, published as a free public XML feed with no signup.

Auth: No HTTPS CORS: Unknown

ExchangeRate-API

Current and historical exchange rates for 165 currencies with daily updates, free plan allows 1,500 requests a month and no credit card.

Auth: apiKey HTTPS CORS: Unknown

Economia.Awesome

Brazilian service for live currency quotes including PTAX central bank rates, free without a key though registering removes the one minute cache.

Auth: No HTTPS CORS: Unknown

apilayer fixer.io

Real-time and historical exchange rates for 170 currencies updated hourly on the free plan, which allows 100 calls a month for non-commercial use.

Auth: apiKey HTTPS CORS: Unknown

CurrencyBeacon

Real-time and historical rates for 160 currencies and 2,000 cryptocurrencies, rebranded from CurrencyScoop to CurrencyBeacon with 5,000 free monthly calls.

Auth: apiKey HTTPS CORS: Unknown

National Bank of Poland

Official Polish zloty exchange rates and gold prices since 2002 in JSON or XML, free and public, HTTPS only as of August 2025.

Auth: No HTTPS CORS: Unknown

Exchangeratesapi.io

Exchange rate data for over 200 currency pairs updated as often as every 60 seconds, with a free tier limited to 100 calls a month.

Auth: apiKey HTTPS CORS: Unknown

VATComply.com

Free European Commission backed exchange rates plus VAT number and IBAN validation, no API key but capped at 2 requests per second.

Auth: No HTTPS CORS: Unknown

Frankfurter

Open source exchange rates for 223 currencies back to 1948, sourced from 104 central banks, free with no API key and no fixed quota.

Auth: No HTTPS CORS: Unknown

Exchangerate.host

Current and historical exchange and crypto rates now run by APILayer, needing a free API key capped at 100 requests a month.

Auth: apiKey HTTPS CORS: Unknown

Currency-api

Free currency exchange rates for 200+ currencies and crypto served from a JSON CDN, no API key and no rate limits, now maintained as exchange-api.

Auth: No HTTPS CORS: Unknown

Currencylayer

Real-time and historical rates for 168 currencies with HTTPS on every plan, free tier limited to 100 calls a month for non-commercial use.

Auth: apiKey HTTPS CORS: Unknown

Best Currency Exchange APIs for Developers

A currency exchange API allows developers to retrieve real-time exchange rates, perform currency conversions, and access historical forex data for over 150 world currencies. These APIs are essential for e-commerce, fintech, and international applications.

Frankfurter is the easiest pick for most projects: no API key, no quota, and rates pulled from 104 central banks, a safe default for hobby projects and production backends alike. The fawazahmed0 exchange-api is the other no key option, serving JSON from a CDN with no rate limits, good for static sites and prototypes. For official single currency rates, the National Bank of Poland, Czech National Bank and Bank of Russia feeds are free and authoritative but only cover their own currency.

The main pitfall here is licensing: free tiers from Fixer and Currencylayer restrict usage to non-commercial projects and cap you at 100 calls a month, so budget for a paid plan before shipping anything commercial. CurrencyBeacon suits apps that also need crypto rates, while ExchangeRate-API is a simple free option for e-commerce price displays.

What to check before you pick one

  • Update frequency: Live trading apps need minute-by-minute rate updates, while e-commerce sites typically need hourly or daily refreshes.
  • Currency coverage: Ensure the API covers all currencies and exotic pairs your application requires.
  • Historical data: Time-series data lets you build currency trend charts and perform backtesting on conversion strategies.

Frequently Asked Questions

What are currency exchange APIs?

Currency exchange APIs provide real-time and historical foreign exchange rates, currency conversion calculations, and forex market data for over 150 world currencies.

Is there a free currency exchange rate API?

Yes. ExchangeRate-API and Open Exchange Rates both offer free tiers with hourly updated rates. Frankfurter API provides ECB rates with no authentication required.

How accurate are currency exchange API rates?

Free APIs typically use aggregated mid-market rates sourced from financial data providers and central banks. For commercial foreign exchange transactions, use bank or regulated payment provider rates instead.

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