Daily exchange rates for 170+ fiat currencies and crypto, published as static JSON.
No auth. No API keys. No rate limits. Just curl.
Base currency: CHF
Mirrors:
curl https://currency-rates.github.io/rates.json{
"EUR": 1.0908,
"USD": 1.2892,
"GBP": 0.9468,
"BTC": 0.00001836,
"ETH": 0.0006152
}Historical rates:
curl https://currency-rates.github.io/2026/02/08/rates.jsonWith fx:
curl -s https://currency-rates.github.io/rates.json | fx .USD
curl -s https://currency-rates.github.io/rates.json | fx 'x => 100 / x.USD * x.EUR'Median across 11 providers, updated every 4 hours:
| Provider | Type | Status |
|---|---|---|
| Aviasales | Fiat |  |
| OpenExchangeRates | Fiat |  |
| ECB | Fiat |  |
| ExchangeRate-API | Fiat |  |
| FloatRates | Fiat |  |
| NBP (Poland) | Fiat |  |
| CNB (Czechia) | Fiat |  |
| BAZG (Switzerland) | Fiat |  |
| Coinbase | Crypto |  |
| CoinGecko | Crypto |  |
| CoinRanking | Crypto |  |
Rates deviating >10% from median are flagged.
- numbr.dev — a smart calculator combined with a notepad
npm ci
npm test
npm run lint