Crypto exchange rates API

Most crypto price APIs stop at “BTC in USD”. Applications that accept, display or report crypto alongside traditional money need more: the price of bitcoin in Brazilian reais, a USDT balance valued in euros, an invoice converted from ETH to Swiss francs. The fxapi crypto exchange rates API puts 16 major cryptocurrencies in the same dataset as 160+ fiat currencies and four precious metals, so every combination is one request away.

Supported cryptocurrencies

How crypto rates work in the API

Crypto codes behave exactly like currency codes:

• As a target – base_currency=USD&currencies=BTC,ETH returns how much BTC and ETH one dollar buys. Invert the value to get the familiar “BTC price in USD”.
• As a base – base_currency=BTC&currencies=USD,EUR returns the price of one bitcoin in dollars and euros directly.
• Filtered – type=crypto limits any response to cryptocurrencies; combine it with any fiat base.

The same works for historical rates, conversion and fluctuation.

Python: value a crypto portfolio in your reporting currency

import os
import requests

holdings = {"BTC": 0.42, "ETH": 3.1, "USDC": 1250}

res = requests.get(
    "https://api.fxapi.com/v1/latest",
    params={"base_currency": "EUR", "currencies": ",".join(holdings)},
    headers={"apikey": os.environ["FXAPI_KEY"]},
    timeout=10,
)
res.raise_for_status()
rates = res.json()["data"]  # units of each crypto per 1 EUR

total_eur = sum(amount / rates[code]["value"] for code, amount in holdings.items())
print(f"Portfolio value: €{total_eur:,.2f}")

Use cases

• Checkout and payments – show the fiat equivalent of a crypto payment before the customer confirms.
• Accounting – value crypto holdings at period end or translate transactions at the rate of the day; see accounting & reporting.
• Portfolio and tax tools – combine crypto and fiat history in one consistent dataset.
• Stablecoin monitoring – compare USDT, USDC and DAI against USD over time with the fluctuation API.

Plans and update frequency

Crypto rates follow your plan’s update interval: daily on Free, hourly on Basic and every 60 seconds on Professional and Enterprise. If you need exchange-level tick data for trading, use a dedicated exchange feed; for pricing, conversion and reporting across fiat and crypto, fxapi keeps everything in one place. See pricing.

This endpoint is part of the fxapi foreign exchange rates API – the same key, response format and 190+ currencies across every endpoint.

Frequently asked questions