Exchangerate.host
Exchangerate.host is a free and freemium currency exchange rates API providing real-time and historical FX data for over 170 currencies including the Nigerian Naira, backed by multiple financial data sources and offering exceptional coverage breadth that spans traditional fiat currencies, precious metals, and cryptocurrency prices in a single unified API service.
The API is particularly well regarded in the developer community for its generous free tier, which historically offered unlimited requests without rate limits. For Nigerian developers building applications with high currency conversion volumes — such as fintech platforms, e-commerce stores serving both local and international customers, or analytics dashboards showing FX trends — the ability to access live rates without per-query costs represents significant economic value, especially during the prototype and early growth phases where revenue is not yet sufficient to justify paid data subscriptions.
The real-time rates endpoint fetches the latest exchange rates for all supported currencies relative to a specified base currency. Rates are updated multiple times daily from the aggregated financial market data providers that power the service. Nigerian applications displaying live Naira exchange rates against USD, EUR, GBP, and other currencies can rely on Exchangerate.host for current rate data that accurately reflects prevailing market conditions.
Historical data access extends back years, enabling trend analysis and retrospective financial calculations. For Nigerian businesses reconciling multi-currency accounts, calculating the historical Naira value of foreign currency assets and transactions, or analyzing how the Naira has performed against trading partner currencies during specific economic periods, historical rate lookups are an essential feature. The API supports specifying any past date to retrieve the exchange rates that were in effect on that day.
Cryptocurrency rate coverage sets Exchangerate.host apart from traditional fiat-only currency APIs. The API includes prices for Bitcoin, Ethereum, and hundreds of other cryptocurrencies converted to fiat currencies, enabling developers to display crypto-to-Naira conversions or integrate crypto pricing into the same FX data layer used for traditional currencies. For Nigerian fintech applications serving both traditional banking customers and crypto-aware users, consolidating fiat and crypto rates through a single API simplifies integration significantly.
Precious metals prices are included alongside fiat and crypto rates. Gold, silver, platinum, and palladium prices are expressed in terms of currency units per troy ounce, enabling applications to display commodity prices alongside currency rates. For Nigerian investors tracking gold prices as an inflation hedge or investment tool, having gold prices available through the same API used for FX data is a convenient consolidation.
Currency conversion is supported through a dedicated convert endpoint accepting source currency, target currency, and amount. This endpoint handles the calculation server-side, returning the converted amount and the rate applied. For applications that only need the conversion result rather than the underlying rate data, this endpoint minimizes response parsing complexity.
Nigerian e-commerce platforms serving both the domestic market and the Nigerian diaspora in the UK, US, and Europe can use Exchangerate.host to display accurate Naira pricing to local customers while showing equivalent foreign currency prices to international visitors. Real-time rates ensure pricing remains accurate as the Naira exchange rate fluctuates, protecting businesses from pricing mismatches caused by stale rates.
The API authenticates through an API key for the paid plans. The JSON response format is consistent and clearly documented with example requests available for all major programming languages. Paid plans unlock higher rate update frequencies, more historical data, and premium support, providing a clear upgrade path as applications grow from prototype to production scale.