Sek-Fx is a Model Context Protocol (MCP) server implemented in Python, designed to connect Large Language Models (LLMs) to the Swedish Riksbank's API. It fetches the exchange rate for a specified currency (using its ISO 4217 code like NOK, EUR, GBP) against the Swedish Krona. This allows LLMs to access real-time currency exchange data for more accurate and contextually relevant responses. The server handles API rate limits and provides instructions for obtaining and setting an API key for higher usage.