5 Best APIs for Rates in Nigeria

XE Currency Data API delivers enterprise-grade foreign exchange rate data from XE, the world most trusted currency authority with over 300 million users globally. XE has been publishing currency data since 1993 and has built its reputation on the accuracy and reliability of its mid-market exchange rates. The XE Currency Data API extends this trusted rate data to developers and enterprises who need audit-grade FX information for financial systems, banking applications, ERP platforms, and compliance reporting. XE mid-market rates represent the midpoint between buy and sell prices in the global forex market, sourced from aggregated quotes across the global interbank market. These mid-market rates serve as the internationally recognized reference point for currency conversions in financial reporting, audit, and compliance contexts. Many Nigerian financial institutions, accounting firms, and corporate treasury teams use XE rates specifically because XE is recognized as a credible, independent source that satisfies auditor and regulator expectations for rate substantiation. The Nigerian Naira is fully supported across all XE Currency Data endpoints. Given the Naira's significant volatility in recent years and the importance of accurate NGN rates for Nigerian businesses with international operations, XE's multi-source rate aggregation methodology provides better rate accuracy than single-source alternatives. Nigerian importers, exporters, and companies with foreign currency debt obligations particularly benefit from rate data that accurately captures current market conditions. Real-time rate delivery ensures that XE Currency Data always reflects the current state of global forex markets. Rates are updated continuously throughout the trading day as market prices move. For Nigerian payment processors, money transfer operators, and foreign exchange bureaux integrating XE rates into customer-facing pricing, the currency rate freshness directly affects the quality of the rates presented to customers and the accuracy of the margins being applied. Historical rate data is available going back many years, enabling retrospective financial calculations and reporting. Nigerian companies preparing financial statements under IFRS, which requires foreign currency transactions to be recorded at transaction-date exchange rates, can use XE historical rates to retrieve the rate that applied on any specific past date. This historical accuracy is critical for audit compliance where the company must be able to substantiate the exchange rates used in financial reporting. The convert endpoint performs currency conversions using XE rates, accepting source currency, target currency, and amount. For applications where only the converted amount is needed rather than the underlying rate, this endpoint simplifies implementation. The API also supports retrieving rate information for a specific list of currency pairs rather than the full currency matrix, optimizing bandwidth for applications with defined currency requirements. XE Currency Data integrates with the full XE product ecosystem. Customers using XE for business money transfers can ensure their operational systems and their FX data layer are using consistent, source-consistent rates. For Nigerian companies that use XE for international payments alongside their own applications, this alignment eliminates discrepancies between system-calculated rates and actual transfer rates. The API is offered through paid subscription plans starting at accessible monthly rates for smaller usage volumes and scaling to enterprise contracts for high-volume financial applications. All plans include access to XE's trusted mid-market rates, historical data, and support from XE's team. Nigerian enterprises with specific data requirements or integration support needs can access dedicated account management through enterprise plans. The REST API uses API key authentication with JSON responses. Comprehensive documentation, SDKs for popular programming languages, and integration guides make implementation straightforward for Nigerian development teams building currency-aware financial applications across banking, fintech, trade finance, and ERP integration contexts.

CurrencyLayer is one of the most widely-used and long-established exchange rate APIs in the world, providing real-time and historical foreign exchange data for 168 currencies and precious metals. Now owned and operated by APILayer — a platform aggregating developer APIs across multiple categories — CurrencyLayer benefits from enterprise-grade infrastructure, high availability, and a large developer community built up over years of operation. Nigerian Naira (NGN) is fully supported as both a source and target currency. **What CurrencyLayer Does** CurrencyLayer delivers exchange rate data sourced from banks and commercial data providers, providing accurate mid-market rates for 168 world currencies alongside precious metals including gold (XAU), silver (XAG), platinum (XPT), and palladium (XPD). The API supports real-time rate queries, historical rate lookups for any past date, and currency conversion calculations. All responses are delivered in JSON format via simple HTTPS GET requests. **Nigeria Support** NGN (Nigerian Naira) is one of 168 supported currencies. On paid plans (Basic and above), NGN can be used as the base currency — allowing Nigerian apps to fetch NGN-denominated rates for all other currencies in a single call. On the free plan, the base currency is locked to USD (developers can still get NGN rates but must calculate conversions from the USD base). **Authentication** API access requires an API key, which is appended to all request URLs as the access_key query parameter (e.g., ?access_key=YOUR_KEY). API keys are issued immediately upon free signup at currencylayer.com. The service uses HTTPS for all requests to protect key confidentiality. **Pricing Plans** CurrencyLayer offers five tiers: - **Free**: 100 API calls/month, USD base currency only, hourly update frequency - **Basic**: $13.99/month — 10,000 calls/month, all 168 base currencies, conversion endpoint - **Professional**: $52.99/month — 100,000 calls/month, 10-minute rate updates - **Professional Plus**: $84.99/month — 500,000 calls/month, 60-second rate updates - **Enterprise**: Custom pricing for very high volume requirements The critical limitation of the free plan is the USD-only base currency restriction. Nigerian developers who need NGN as a base currency (e.g., to display NGN/USD rather than USD/NGN) must upgrade to at least the Basic plan ($13.99/month). **Update Frequency** Like ExchangeRate-API and other tiered providers, CurrencyLayer's rate freshness scales with plan: - Free and Basic: Updated every 60 minutes - Professional: Updated every 10 minutes - Professional Plus: Updated every 60 seconds For production Nigerian fintech applications requiring near real-time accuracy, the Professional Plus plan's 60-second updates are appropriate. **Historical Data** Historical exchange rate data is available on paid plans, enabling developers to query the exact NGN exchange rate on any specific past date. This is critical for Nigerian businesses that need to record foreign-currency transactions at the exchange rate prevailing on the transaction date — a requirement under IFRS accounting standards used by many Nigerian companies. **Precious Metals** CurrencyLayer is one of the few exchange rate APIs that includes gold and silver prices in its currency list. Gold (XAU) and silver (XAG) prices are returned in the same API response as fiat currencies, making CurrencyLayer useful for Nigerian commodity investment platforms and jewellery businesses that need to track both precious metal values and NGN FX rates. **APILayer Ecosystem** As part of the APILayer product suite, CurrencyLayer users can manage their API key, view usage analytics, and access support through the APILayer dashboard. APILayer also offers complementary APIs (VAT rates, IP geolocation, etc.) that can be purchased and managed in the same account — convenient for developers building multi-feature financial applications. **Important Limitation for Nigeria** CurrencyLayer provides official mid-market exchange rates from banks and data providers. It does not provide Nigerian parallel market (black market) or Bureau de Change rates. In periods of significant Naira volatility or divergence between official and parallel rates, CurrencyLayer rates may not reflect what Nigerian consumers or informal businesses actually transact at. For parallel market tracking, use Monierate. **Comparison with ExchangeRate-API** CurrencyLayer is older and more widely deployed but has a more restrictive free tier (100 calls vs. 1,500 calls on ExchangeRate-API). The Basic plan at $13.99/month is more expensive than ExchangeRate-API Pro at $10/month for comparable features. CurrencyLayer's advantage is the inclusion of precious metals and the APILayer ecosystem. Choose CurrencyLayer if precious metals rates or APILayer ecosystem integration matter; choose ExchangeRate-API for a more generous free tier and lower entry-level paid pricing. **Frequently Asked Questions** Q: Can I use NGN as a base currency on the free plan? A: No. The free plan is locked to USD as the base currency. Upgrade to Basic ($13.99/month) for NGN base currency support. Q: Does CurrencyLayer include gold prices? A: Yes. Gold (XAU), silver (XAG), platinum (XPT), and palladium (XPD) are included in the 168-currency response. Q: How do I authenticate API requests? A: Append your API key as access_key=[YOUR_KEY] in the request URL query string. Q: Is there a sandbox for testing? A: No dedicated sandbox — testing uses the live API with free tier credentials. Q: Who owns CurrencyLayer? A: CurrencyLayer is owned by APILayer, a platform aggregating developer-focused APIs.

Open Exchange Rates is one of the most widely deployed foreign exchange rate APIs in the world, used by thousands of applications ranging from e-commerce platforms and accounting software to fintech apps and content management systems. The service provides clean, reliable JSON exchange rate data for over 200 currencies, with rates updated hourly on the free tier and in real time on paid plans. Historical data going back to 2001 is available for all supported currencies, making it one of the deepest historical forex datasets accessible through a simple API. For Nigerian developers building currency-aware applications, Open Exchange Rates provides dependable NGN rate data alongside every other major world currency. Nigeria's currency situation makes exchange rate data critically important for application developers. The Nigerian Naira (NGN) has experienced significant depreciation against the US Dollar and other hard currencies over the past decade, driven by oil price volatility, foreign exchange policy changes, and structural economic factors. Nigerian applications that deal with foreign currencies — e-commerce platforms, accounting tools, remittance services, salary calculation apps for multinational employees, and investment platforms — all need accurate, regularly updated exchange rate data to function correctly. The /latest.json endpoint is the most commonly used endpoint, returning current exchange rates for all 200+ currencies from the specified base currency. On the free plan, only USD is available as the base currency — meaning all rates are expressed as units of currency per 1 USD. The USD/NGN rate is available on the free plan. For Nigerian applications that need NGN as the base currency (showing how much USD, EUR, or GBP costs in naira terms), the Starter plan ($12/month) enables any base currency. For most Nigerian applications, the USD-base approach with client-side inversion is functionally equivalent. Historical rates are available via /historical/{YYYY-MM-DD}.json, returning exchange rates as they were on any past date. This capability is essential for Nigerian accounting software and ERP systems that need to record foreign currency transactions at the exchange rate on the transaction date — a requirement under International Financial Reporting Standards (IFRS) and a common requirement in Nigerian corporate accounting practice. With rates available back to 2001, Nigerian finance teams can reconstruct historical exchange rate data for any period their records cover. The /convert endpoint performs currency conversion: specify an amount, a from-currency, and a to-currency, and receive the converted amount at the current rate. For Nigerian e-commerce platforms that display product prices in multiple currencies, this endpoint handles the arithmetic server-side without the developer needing to fetch rates and calculate manually. The /time-series endpoint returns exchange rate data over a date range, ideal for building trend charts and calculating average rates over periods. A Nigerian corporate treasurer tracking the average USD/NGN rate over each quarter, or a Nigerian researcher analyzing the correlation between naira depreciation and inflation, can use time-series data directly without downloading and processing historical files. Open Exchange Rates also provides OHLCV (open, high, low, close, volume) daily rate data for currency pairs — useful for Nigerian forex analytics tools that need to display candlestick charts or calculate volatility metrics for currency pairs. The free plan provides 1,000 API requests per month with hourly rate updates — sufficient for a low-traffic application or prototype. The Starter plan ($12/month) provides 10,000 requests per month, unlocks any base currency, and removes the USD-only restriction. The Production plan ($97/month) provides real-time rate updates and 100,000 requests per month, appropriate for high-traffic Nigerian fintech applications. All plans use a simple app_id API key parameter with no request signing, making integration extremely quick.

Alpha Vantage is a comprehensive financial data API covering US stocks, ETFs, mutual funds, forex exchange rates, cryptocurrencies, commodities, and economic indicators — all accessible through a single, consistent REST API with a generous free tier. The platform is particularly notable for its extensive library of over 50 pre-calculated technical indicators (RSI, MACD, Bollinger Bands, EMA, SMA, and many more), which are available as first-class API endpoints rather than requiring developers to compute them from raw price data. For financial application developers and quantitative analysts, Alpha Vantage provides a rich data foundation that spans traditional finance and crypto in a single integration. Nigerian developers should be aware of an important context distinction: Alpha Vantage's API key and data endpoints are accessible from Nigeria without geographic restrictions, and the forex and cryptocurrency data are fully usable for Nigerian applications. However, Alpha Vantage is primarily oriented toward US stock market data — NYSE and NASDAQ-listed companies, US ETFs, and US economic indicators. Nigerian Stock Exchange (NGX) listed stocks are not covered. The ng_support=false designation reflects that the primary use case (US equities) does not serve Nigerian users, not that the API itself is blocked. Nigerian developers building forex tools, crypto analytics, and global market data applications can use Alpha Vantage productively. The Forex (FX) module provides exchange rate data for 180+ currency pairs including USD/NGN, EUR/NGN, GBP/NGN, and all major cross-currency combinations. The FX_DAILY endpoint returns daily OHLCV (open, high, low, close, volume) data going back 20+ years for any forex pair — enabling Nigerian developers to build long-term trend charts showing the USD/NGN rate history. FX_INTRADAY provides intraday data at 1-minute, 5-minute, 15-minute, 30-minute, and 60-minute intervals, enabling high-frequency forex rate displays for Nigerian trading platforms. The Cryptocurrency module covers Bitcoin, Ethereum, and hundreds of altcoins with DIGITAL_CURRENCY_DAILY, DIGITAL_CURRENCY_WEEKLY, and DIGITAL_CURRENCY_MONTHLY endpoints. Each crypto data point includes both the USD value and the value in a specified market currency — Nigerian developers can request BTC/USD data with NGN conversion included in every response, enabling portfolio tracking applications that display crypto values directly in naira. Technical Indicators are Alpha Vantage's most distinctive feature. Rather than fetching raw OHLCV data and computing indicators client-side, Nigerian developers can call endpoints like GET /query?function=RSI&symbol=BTC&interval=daily to receive pre-calculated RSI values going back years. The 50+ available indicators cover trend-following (EMA, SMA, WMA, DEMA, TEMA), momentum (RSI, MACD, STOCH, CCI, MOM, ROC), volatility (BBANDS, ATR), and volume indicators. For Nigerian quantitative developers building algorithmic trading systems or analysis tools, this eliminates significant computational overhead. The Economic Indicators module covers US macroeconomic data: Federal Reserve interest rates, CPI inflation, unemployment, GDP, and treasury yields. While these are US-focused metrics, they are globally relevant — Nigerian investors and analysts closely track US Fed rate decisions because they directly affect global capital flows, dollar strength, and by extension NGN/USD exchange rates. The News & Sentiment endpoint returns financial news articles with AI-generated sentiment scores for specific stocks, sectors, or forex pairs. Nigerian financial analysts building market research tools can use this endpoint to track sentiment around USD/NGN, US equities held by Nigerian investors, or cryptocurrency markets. The free tier provides 25 requests per day and 500 per month — sufficient for learning the API and building prototypes. Premium plans starting at $50/month (75 requests per minute) support production applications. No credit card is required for the free tier, making it accessible to Nigerian developers exploring the platform without financial commitment.

Fixer.io is one of the most widely used foreign exchange rate APIs in the developer community, providing real-time and historical exchange rate data for over 170 currencies with a track record of reliability that has made it a trusted foundation for thousands of commercial financial applications globally. Built and maintained by APilayer, Fixer.io has evolved from a simple ECB rate proxy into a comprehensive FX data service aggregating rates from financial data providers with global coverage. The API provides a latest rates endpoint that returns current exchange rates for all supported currencies against a specified base currency. On the free plan, EUR is the only available base currency — reflecting Fixer.io's origins as an ECB rate service — but paid plans unlock any currency as base including the Nigerian Naira, US Dollar, British Pound, and all other supported currencies. For Nigerian applications where showing Naira as the base currency matters for user experience, upgrading to a paid plan enables NGN-based rate tables that are immediately intuitive to Nigerian users. Historical rates are accessible through a date parameter that retrieves the exchange rates that were in effect on any past date. Fixer.io maintains an extensive historical database covering many years of past rates, enabling applications to reconstruct the Naira exchange rate history, calculate the cost of historical foreign currency transactions, or build trend analysis features. Nigerian accountants and financial controllers preparing comparative financial statements need accurate historical rates for the periods being compared, and Fixer.io provides this data reliably. The time-series endpoint enables querying exchange rates across a date range, returning rates for each day between the start and end dates in a single API response. This time-series data powers trend charts, moving average calculations, and volatility analysis. For Nigerian financial professionals analyzing currency trends to inform hedging decisions or procurement timing, time-series data provides the raw material for meaningful analysis without requiring day-by-day API queries. The fluctuation endpoint is a unique Fixer.io feature that returns the change in exchange rates between two dates, expressing both absolute change and percentage change for each currency. For Nigerian import businesses monitoring how the Naira has moved against supplier currencies over a given period, the fluctuation endpoint provides a direct comparison without requiring the client application to calculate differences from raw rate data. Currency conversion is directly supported through a dedicated convert endpoint that accepts source and target currency codes and an amount, returning the converted value calculated at current rates. This endpoint streamlines implementation for applications where only the final converted amount is needed rather than access to the underlying rate data. Fixer.io is available through a freemium model where the free plan provides access to the core functionality with EUR as the only base currency. Professional plans unlock additional base currencies including NGN, increase request frequency, and enable access to historical data, time-series, and fluctuation endpoints. The pricing is transparent and competitive with comparable FX data services, making it accessible for Nigerian fintech startups at various stages of growth. Nigerian payment processors, fintech platforms, accounting software vendors, and e-commerce developers have deployed Fixer.io as the exchange rate data backbone for their products. The API's extensive documentation, code samples in multiple languages, and the large developer community means that integration questions have usually already been answered in forums and documentation. API key authentication with straightforward query parameters and consistent JSON responses makes Fixer.io one of the fastest currency APIs to integrate into new Nigerian applications.