Free Currency Exchange API — No Key Required

The only free currency converter API with no API key, no signup, and no monthly cap. 100+ currencies, live mid-market rates, CORS enabled. Copy one URL and start converting.

GET STARTED IN 5 SECONDS

https://www.currencyexchangetool.com/api/v1/convert?amount=100&from=USD&to=EUR

url

No API key. No signup. No credit card. Paste this URL into a browser, terminal, Python script, or Google Sheets. Works instantly — returns live mid-market rates from Yahoo Finance.

Why This Free Currency API Is Different

🔓 No API KeyNo registration, no dashboard, no auth tokens. Just a URL. Every endpoint is public.

🌍 100+ CurrenciesUSD, EUR, UAH, GBP, JPY, CHF, CAD, AUD, PLN, RON, THB, INR, CNY, GHS, and more.

⚡ Live RatesFetched live from Yahoo Finance on every request. No cached or stale data — real mid-market rates.

🌐 CORS EnabledAccess-Control-Allow-Origin: * on every response. Call directly from browser JavaScript with fetch().

📊 No Monthly CapUnlike ExchangeRate-API (1,500/mo) or Fixer (100/mo), this API has no monthly limit — only fair per-minute rate limiting.

📋 Structured JSONEvery response has a success/error envelope with error codes, rate-limit headers, and 24h change data.

How to Use the Free Currency API

The API works with any HTTP client. No SDK, no special headers, no authentication. Choose your language:

JavaScript (Browser)

// No API key — just fetch
const res = await fetch(
  'https://www.currencyexchangetool.com/api/v1/convert?amount=100&from=USD&to=EUR'
);
const data = await res.json();
console.log(`100 USD = ${data.result} EUR at rate ${data.rate}`);

javascript

Python

import requests

# No API key, no signup — just a GET request
res = requests.get(
    'https://www.currencyexchangetool.com/api/v1/convert',
    params={'amount': 100, 'from': 'USD', 'to': 'EUR'}
)
data = res.json()
print(f"100 USD = {data['result']} EUR at rate {data['rate']}")

python

cURL (Terminal)

curl -s "https://www.currencyexchangetool.com/api/v1/convert?amount=100&from=USD&to=EUR"

bash

Google Sheets

=VALUE(IMPORTXML(
  "https://www.currencyexchangetool.com/api/v1/convert?amount=1&from=USD&to=EUR&format=xml",
  "/response/rate"
))

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What Is a Free Currency Exchange API?

A free currency exchange API is a web service that provides real-time exchange rates between currencies through a simple HTTP interface. Instead of manually looking up rates on a converter website, developers embed the API into their apps, spreadsheets, dashboards, and scripts to get live rates programmatically.

Most currency APIs fall into two categories:

Freemium APIs (ExchangeRate-API, Fixer, Open Exchange Rates) — require signup and an API key even for the "free" tier, and cap monthly requests at 100–1,500 calls.
Truly free APIs (Frankfurter, this API) — no API key, no signup, no monthly cap. Just a URL and a GET request.

The Currency Exchange Tool API belongs to the second category. It was built to be the simplest free currency API — no key, no signup, no credit card, and generous rate limits that work for real projects. Read the full API documentation for endpoint details, parameter tables, and status codes.

What Can You Build With a Free Currency API?

💻 Web AppsAdd live currency conversion to any website. Display prices in multiple currencies with a single fetch() call.

📊 DashboardsPull live exchange rates into Grafana, Power BI, or Google Sheets for real-time financial dashboards.

🤖 Bots & ScriptsAutomate currency conversion in Telegram bots, Slack apps, cron jobs, and Python scripts.

🛒 E-CommerceShow product prices in the visitor's local currency. Convert at the mid-market rate — no hidden markups.

📱 Mobile AppsUse the CORS-enabled endpoints directly from React Native, Flutter, or Swift apps — no proxy needed.

📈 Fintech MVPsPrototype a money transfer app, portfolio tracker, or exchange rate monitor without paying for an API key.

API Endpoints at a Glance

GET/api/v1/convert

Convert any amount between two currencies at the live mid-market rate. Supports JSON (default) and XML format for Google Sheets.

GET/api/v1/currencies

Returns all 100+ supported currencies with ISO codes and names. Use this to build currency pickers and dropdowns.

GET/api/v1/history

Historical daily rates — last N days, single date, or date range (up to 1825 days / 5 years).

📖 See the complete API documentation for full parameter tables, response schemas, rate-limit headers, and status codes.

Free Currency API Comparison (2026)

Not all "free" currency APIs are truly free. Here is how this API compares to the alternatives in 2026:

API Provider	API Key?	Signup?	Currencies	Free Limit	Updates
Currency Exchange Tool ⭐	No	No	100+	100/min, no monthly cap	Live
Frankfurter	No	No	~30 (ECB)	Unlimited	Daily
MoneyConvert	No	No	182+	Rate-limited	5 min
ExchangeRate-API (Open)	No	No	160+	Rate-limited	Daily
ExchangeRate-API (Free)	Yes	Yes	160+	1,500/mo	Daily
FreeCurrencyAPI	Yes	Yes	32	1,000/mo	Daily
Open Exchange Rates	Yes	Yes	170+	1,000/mo	Hourly
Fixer.io	Yes	Yes	170+	100/mo	Daily
CurrencyAPI.net	Yes	Yes	300+	500/mo	Daily

Key takeaway: This is the only free currency API combining no API key, no signup, 100+ currencies, live rates, and no monthly cap.

Frequently Asked Questions

Do I need an API key to use this?

No. The Currency Exchange Tool API is completely open — no API key, no signup, no credit card, no dashboard. Just copy the URL and send a GET request from any language, terminal, or spreadsheet.

Is this really free — no catch?

Yes. There is no monthly cap, no hidden limit, and no "free tier" upsell. Rate limiting is per-IP (100 req/min for convert, 30 req/min for history) to keep the service fair for everyone.

What currencies are supported?

100+ currencies including USD, EUR, UAH, GBP, JPY, CHF, CAD, AUD, PLN, RON, THB, INR, CNY, GHS, and many more. Fetch the full list from /api/v1/currencies.

Can I use this API in a browser (JavaScript)?

Yes. Every endpoint returns Access-Control-Allow-Origin: * and supports OPTIONS preflight. You can call it directly with fetch() — no proxy, no server, no CORS headaches.

Can I use this in Google Sheets?

Yes. Add format=xml to /api/v1/convert and use IMPORTXML. See the full Google Sheets API guide on our blog.

How do exchange rates compare to bank rates?

This API returns the mid-market rate — the same rate banks use to trade among themselves. Banks and money transfer services typically add a 2-5% spread on top. Use this API to see the real rate before you convert.

Is historical data available?

Yes — up to 1825 days (5 years) via /api/v1/history. Query by number of days, single date, or date range.

Can I use this for a commercial project?

Yes. The API returns structured JSON with a success/error envelope, rate-limit headers, and CORS — suitable for production use in fintech apps, side projects, and dashboards.

How is this different from other free currency APIs?

Most "free" currency APIs require signup, an API key, or cap you at 100-1500 requests per month. This API has no key, no signup, and no monthly limit — only fair per-minute rate limiting.

Ready to Start Converting?

Read the full API docs with endpoint details, code examples in 6 languages, and response schemas.

📖 Full API Documentation 💱 Open Converter