1 Best APIs for Earnings & Fundamentals in Nigeria

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.