Fehu: CLI Double-Entry Bookkeeping with Claude AI MCP Integration

Fehu is a CLI personal accounting tool that integrates with Claude AI through MCP (Model Context Protocol). It's a lightweight double-entry bookkeeping system backed by SQLite, enabling users to manage finances through Claude Desktop by talking to their ledger.

Key Features

• Hierarchical accounts: Uses colon-separated account structures like asset:bank:chase and expense:food:dining
• Auto-tagging: Automatically tags transactions with #hashtags included in descriptions
• Powerful calc engine: Filter transactions by period, tag, and perform set operations including union, intersect, and XOR
• Multi-currency support: Handles USD, KRW, BTC (with 8 decimal precision), and other currencies

The MCP integration allows users to record transactions through natural language commands. For example, saying "Record my lunch, $12 from my Chase account" prompts Claude to handle the transaction entry while maintaining balanced double-entry accounting principles.

Fehu ensures transactions are always balanced, preventing dirty data in the ledger. The tool is MIT licensed and open source, providing AI-assisted budgeting without requiring users to share financial data with third-party SaaS platforms.

This tool is for developers who want to manage personal finances through Claude AI while maintaining control over their financial data.