Currency Conversion With Historical Rates

** - MCP server acting as an interface to the [Frankfurter API](https://frankfurter.dev/) for currency exchange data.

Unique: Provides point-in-time currency conversion by combining historical rate retrieval with conversion logic, enabling agents to reason about past financial transactions. LRU caching ensures that repeated conversions on the same date reuse cached rate data without API calls.

vs others: Enables historical financial analysis in agents without requiring manual rate lookups or external databases; caching makes repeated historical conversions efficient