Free Currency Exchange Rate API Comparison 2026

// Latest USD rates — no API key needed
const res = await fetch('https://api.frankfurter.dev/v1/latest?base=USD&symbols=EUR,GBP,JPY');
const data = await res.json();

console.log(`1 USD = ${data.rates.EUR} EUR`);
console.log(`1 USD = ${data.rates.GBP} GBP`);
console.log(`1 USD = ${data.rates.JPY} JPY`);

// Convert 250 USD to EUR
const eurAmount = 250 * data.rates.EUR;
console.log(`250 USD = ${eurAmount.toFixed(2)} EUR`);

import requests

# Latest rates
r = requests.get('https://api.frankfurter.dev/v1/latest', params={
    'base': 'USD',
    'symbols': 'EUR,GBP,JPY'
})
data = r.json()

for currency, rate in data['rates'].items():
    print(f"1 USD = {rate} {currency}")

# Historical rate
r = requests.get('https://api.frankfurter.dev/v1/2025-06-15', params={
    'base': 'USD', 'symbols': 'EUR'
})
print(f"Historical: {r.json()}")

const API_KEY = 'YOUR_KEY'; // Get free at exchangerate-api.com

// Latest rates
const res = await fetch(`https://v6.exchangerate-api.com/v6/${API_KEY}/latest/USD`);
const data = await res.json();

console.log(`1 USD = ${data.conversion_rates.EUR} EUR`);
console.log(`Last updated: ${data.time_last_update_utc}`);

// Direct pair conversion with amount
const pair = await fetch(`https://v6.exchangerate-api.com/v6/${API_KEY}/pair/USD/EUR/250`);
const result = await pair.json();
console.log(`250 USD = ${result.conversion_result} EUR`);

import requests

API_KEY = 'YOUR_KEY'  # Get free at exchangerate-api.com

# Latest rates
r = requests.get(f'https://v6.exchangerate-api.com/v6/{API_KEY}/latest/USD')
data = r.json()

print(f"1 USD = {data['conversion_rates']['EUR']} EUR")
print(f"1 USD = {data['conversion_rates']['GBP']} GBP")

# Pair conversion
r = requests.get(f'https://v6.exchangerate-api.com/v6/{API_KEY}/pair/USD/EUR/250')
print(f"250 USD = {r.json()['conversion_result']} EUR")

// Get crypto prices — no API key needed
const btc = await fetch('https://api-catalog-three.vercel.app/v1/crypto-feeds/api/price/BTC');
const eth = await fetch('https://api-catalog-three.vercel.app/v1/crypto-feeds/api/price/ETH');

const btcData = await btc.json();
const ethData = await eth.json();

console.log(`BTC: $${parseFloat(btcData.price).toLocaleString()}`);
console.log(`ETH: $${parseFloat(ethData.price).toLocaleString()}`);

// Calculate portfolio value
const portfolio = { BTC: 0.5, ETH: 10 };
const total = (0.5 * parseFloat(btcData.price)) + (10 * parseFloat(ethData.price));
console.log(`Portfolio: $${total.toLocaleString()}`);

import requests

# Get crypto prices — no API key needed
symbols = ['BTC', 'ETH', 'SOL', 'DOGE']

for symbol in symbols:
    r = requests.get(f'https://api-catalog-three.vercel.app/v1/crypto-feeds/api/price/{symbol}')
    data = r.json()
    price = float(data['price'])
    print(f"{symbol}: ${price:,.2f}")