How to Choose the Best Currency Exchange API in 2026
There are 17 Currency Exchange APIs in our directory. Of these, 7 require no authentication, making them ideal for quick prototyping. 7 are rated beginner-friendly.
Scores last tested: 2026-08-10
Quick Comparison: Top 10 Currency Exchange APIs
Ranked by API Score. Measured means we called a real endpoint of that API; Est. means the score is derived from metadata because the endpoint could not be called without credentials. Discontinued APIs are excluded.
| Name | API Score | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|---|
| ExchangeRate-API | 87 A Est. | API Key | ✓ | ✓ | Intermediate |
| Currency-api | 85 A Measured | No Auth | ✓ | ✓ | Beginner |
| Economia.Awesome | 84 A Measured | No Auth | ✓ | ? | Beginner |
| 1Forge | 82 A Est. | API Key | ✓ | ? | Intermediate |
| CurrencyFreaks | 82 A Est. | API Key | ✓ | ✓ | Intermediate |
| Frankfurter | 82 A Measured | No Auth | ✓ | ✓ | Beginner |
| Exchangeratesapi.io | 77 B Est. | API Key | ✓ | ✓ | Intermediate |
| Bank of Russia | 77 B Est. | No Auth | ✓ | ? | Beginner |
| CurrencyScoop | 77 B Est. | API Key | ✓ | ✓ | Intermediate |
| National Bank of Poland | 77 B Measured | No Auth | ✓ | ✓ | Beginner |
Free Currency Exchange APIs (No Auth)
These APIs require no API key or signup. Start using them immediately.
Exchangerate.host
⭐ Beginner's PickExchangerate.host provides free foreign exchange and cryptocurrency rates via a simple REST API, covering 170+ currencies and major crypto assets.
Bank of Russia
The Bank of Russia XML API provides official daily exchange rates for foreign currencies against the Russian Ruble, published by the Central Bank of the Russian Federation.
Currency-api
⭐ Beginner's PickCurrency-api is a free, open-source currency exchange rates API hosted on GitHub with no rate limits, no authentication, and support for 150+ currencies.
Czech National Bank
The Czech National Bank (CNB) publishes official daily exchange rates for 30+ currencies against the Czech Koruna (CZK) as a plain XML file.
Economia.Awesome
⭐ Beginner's PickEconomia.Awesome is a free Brazilian API that provides real-time and historical currency exchange rates for dozens of currency pairs, including BRL (Brazilian Real) against USD, EUR, BTC, and more.
Frankfurter
⭐ Beginner's PickFrankfurter is an open-source currency data API backed by the European Central Bank (ECB) exchange rate dataset, providing rates for 33 major currencies updated every weekday.
Try It in 5 Minutes: Currency-api
Quick implementation example using Currency-api.
Using curl
curl https://cdn.jsdelivr.net/npm/@fawazahmed0/currency-api@latest/v1/currencies/usd.json
New to APIs? Read our Getting Started Guide →
Frequently Asked Questions
How many Currency Exchange APIs are available?
There are 17 Currency Exchange APIs in our directory as of 2026.
Are there free Currency Exchange APIs?
Yes, 7 Currency Exchange APIs require no authentication and are completely free to use.
What is the easiest Currency Exchange API to use?
Currency-api is one of the easiest to get started with. It is rated as beginner-level and requires no authentication.
Do I need an API key for Currency Exchange APIs?
It depends. 7 APIs need no authentication, 8 require an API key, and 0 use OAuth.