2 Best APIs for Finance in Nigeria

ValueRay is a financial data API specializing in stock market valuation metrics, fundamental financial ratios, and equity analysis data for global publicly traded companies. Designed for investment application developers, portfolio analytics platforms, and financial research tools, ValueRay provides the quantitative financial data that investors use to assess whether individual stocks are overvalued, undervalued, or fairly priced relative to their earnings, assets, and growth prospects. The core data offering revolves around fundamental valuation ratios that are central to both value investing and quantitative equity analysis. Price-to-earnings (P/E) ratio, price-to-book (P/B) ratio, price-to-sales (P/S) ratio, enterprise value to EBITDA, and forward valuation metrics based on analyst earnings estimates are among the key indicators ValueRay aggregates and provides through its API. These ratios provide a standardized basis for comparing the relative valuation of different companies across industries and markets. Financial ratio data extends into performance metrics including return on equity, return on assets, profit margins, revenue growth rates, earnings per share, and dividend yield. These profitability and efficiency metrics are fundamental inputs into equity research and stock screening. Investment platforms can use ValueRay data to build stock screening tools that filter thousands of global equities down to the subset matching specific fundamental quality and valuation criteria defined by the investor. Earnings data is a critical component for equity valuation. ValueRay provides earnings per share history, earnings surprise data showing how actual results compared to analyst estimates, and forward earnings estimates where available. Earnings surprises are particularly important market moving events — companies that consistently beat expectations typically see positive stock price momentum, while companies that miss expectations experience the reverse. Nigerian investors tracking international stocks through platforms like Bamboo and Trove can use this earnings context to better understand the fundamental drivers of price movements in their portfolios. Market capitalization data classifies companies by size across large-cap, mid-cap, and small-cap tiers, enabling filtering and analysis by company size. Sector and industry classification data organizes companies into standard industry groups, enabling sector-level analysis and comparison. Nigerian investors who want to understand how their portfolio is allocated across different sectors and company sizes can use this classification data for portfolio construction and risk assessment purposes. Historical fundamental data allows tracking how valuation ratios and financial metrics have changed over time for individual companies. This time series perspective on fundamentals is important for assessing whether a company's current valuation is high or low relative to its own historical norms, not just cross-sectional comparisons with peers. A stock with a currently elevated P/E ratio may be less concerning if the company's historical P/E has consistently been high due to above-average growth expectations. For the Nigerian investment market specifically, growing numbers of Nigerian retail and institutional investors are allocating portions of their portfolios to US and global equities through regulated investment platforms. As Nigerian investor sophistication grows, demand for fundamental financial data rather than just price charts is increasing. ValueRay provides the data layer that investment platforms need to satisfy this demand by displaying valuation context alongside price data. The API is available through a freemium model allowing developers to access core features on a free tier, with paid plans unlocking higher data volumes and additional premium data endpoints. Authentication uses standard API key headers with JSON response format. Nigerian developers building investment analytics tools can integrate ValueRay to deliver the fundamental data insights that differentiate serious investment platforms from basic price tracking applications.

CoinStats is a comprehensive cryptocurrency data and portfolio tracking API that aggregates market data from hundreds of cryptocurrency exchanges and blockchain networks to provide developers with real-time prices, portfolio analytics, DeFi yields, NFT data, and wallet tracking capabilities across over 120 blockchains and thousands of digital assets. The API serves as a centralized data layer for cryptocurrency applications, eliminating the need to build individual integrations with dozens of exchange APIs and blockchain nodes to access comprehensive crypto market data. By aggregating from multiple sources, CoinStats provides better price accuracy through cross-exchange averaging and ensures data availability even when individual exchanges experience downtime. For Nigerian crypto application developers, this aggregated approach is more reliable than depending on a single exchange's API. Cryptocurrency price data covers over 10,000 coins and tokens with current prices, 24-hour price change percentages, market capitalization, trading volume, and circulating supply. For each asset, price history is available at multiple time resolutions including minute, hourly, and daily intervals, enabling charts that display price movements over periods from the last hour to the full history of the asset. Nigerian crypto apps can display comprehensive market data for not just Bitcoin and Ethereum but the full spectrum of altcoins and DeFi tokens that Nigerian traders and investors hold. Portfolio tracking is a distinguishing CoinStats capability. The API enables applications to track a user's cryptocurrency holdings across multiple wallets and exchange accounts, calculating total portfolio value, individual asset allocations, profit and loss figures, and portfolio performance over time. Nigerian crypto investors who hold assets across multiple wallets — hardware wallets, software wallets, and exchange accounts — benefit from unified portfolio visibility in a single application rather than checking each account separately. Wallet analytics allows querying any public blockchain address to retrieve its current token balances, transaction history, and DeFi positions without requiring users to manually enter or update their holdings. For blockchains with public ledgers, users can add their wallet addresses to a CoinStats-powered application and receive automatic portfolio updates whenever they make transactions. This automatic synchronization removes the data entry burden from users and keeps portfolio data current without manual intervention. DeFi protocol data covers yield farming positions, liquidity pool holdings, and staking rewards across the major DeFi protocols on Ethereum, Binance Smart Chain, Polygon, Avalanche, and other networks. For Nigerian DeFi participants who have funds deployed in yield-generating protocols, seeing their DeFi positions integrated alongside regular crypto holdings gives a complete picture of their digital asset exposure and earnings. NFT data provides floor prices, collection statistics, and individual NFT valuations for major NFT marketplaces and collections. The growing Nigerian NFT creator and collector community benefits from applications that integrate NFT portfolio value alongside fungible token holdings. Exchange integration data covers trading pairs, order books, and trading volume from hundreds of cryptocurrency exchanges. Nigerian crypto traders who compare prices across exchanges to find the best execution can use this exchange data to build arbitrage monitoring tools or price comparison features. The API is available through a freemium model making it accessible to Nigerian developers at all stages. The CoinStats developer program provides documentation, sandbox access, and support for teams building crypto portfolio applications, trading tools, and DeFi analytics dashboards. Authentication uses API keys with clear rate limit tiers that scale with subscription level.