
SQLAPI++
Abstract Database Connector
CppDB - SQL Connectivity Library
dotConnect
FinancialData.net
Alpha Vantage
Twelve Data
Polygon.io
Financial Modeling Prep
FinFeedAPI
Finqual.app
Quandl
FinancialData.Net API provides end-of-day and intraday stock market data, company financial statements, key financial ratios and metrics, insider and institutional trading data, sustainability data, earnings releases, and more. Over 20 years of historical data is available, covering 17,000+ stocks, 20,000+ funds, 3,000+ ETFs, 13,000+ OTC securities, and 200,000+ derivatives. Data can be accessed through the API or the data viewer, with datasets exportable to Excel, CSV, or JSON. An official MCP server for AI agents is also available.
SQLAPI++
FinancialData.netAbstract Database Connector - Abstract Database Connector is a C/C++ library for making connections to several databases (MySQL...
Alpha Vantage - Alpha Vantage offers free APIs in JSON and CSV formats for realtime and historical stock and forex data, digital/crypto currency data and over 50 technical indicators.
CppDB - SQL Connectivity Library - CppDB is an SQL connectivity library that is designed to provide platform and Database independent connectivity API similarly to what JDBC, ODBC and other connectivity libraries do. http://cppcms.com/sql/cppdb/
Twelve Data - The simplest and most effective way to access both realtime and historical stock, forex, cryptocurrency data, and over 100 technical indicators.
dotConnect - Ultimate solution for developing data-related .NET applications
Polygon.io - Polygon.io offers streaming realtime data for stocks/equities, ETFs, Indecies and Forex/Currencies including crypto currencies. Our Real-Time Stock Data APIs help you build the future on fintech.