Fibonacci is a secure Model Context Protocol (MCP) server designed to meet OpenAI's MCP specifications, offering a robust suite of tools. Beyond its core function of calculating Fibonacci numbers, it includes a BMI calculator and a code review prompt generator. Engineered for production deployment, the server incorporates comprehensive security measures such as rate limiting, input validation, CORS configuration, and automatic session management. It also features health checks, structured logging, and environment-specific configurations to ensure reliability and compliance.