Show HN: CLI for your financial data (and Costco and Amazon)

Category: cli-tool

Tags: cli, personal-finance, plaid, agent-tools, amazon

Score: 7.0/10 (Innovation: 7, Technical: 7, Documentation: 8, Utility: 7)

fin is a CLI tool that unifies personal financial data from multiple banks, brokerages, Amazon, and Costco into a single interface, with JSON output designed for AI agent consumption. It leverages Plaid for account and transaction data and provides rich features like Amazon item-level categorization, holdings with cost basis, and DuckDB integration for querying. The project is notable for its clean UX and explicit focus on agent-readable outputs, making it a bridge between personal finance and LLM-driven workflows.

Target audience: developers and power users interested in personal finance automation, AI agent builders

Repository: https://kilianc.github.io/fin/

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