Free Forex APIs have democratized access to real-time market data, offering exchange rates, historical data, economic indicators, and news updates without subscription fees. The evolution of Forex APIs traces back to the early days of electronic trading, where proprietary APIs were utilized by institutions and professional traders. With technological advancements, standardized Forex APIs emerged, making market data accessible to retail traders and developers. API documentation plays a crucial role in guiding users through integration, providing details on endpoints, data formats, authentication methods, and usage guidelines. It includes code snippets and examples to facilitate seamless utilization of the API's capabilities, empowering traders to make informed decisions and optimize their trading strategies effectively.