Connects Claude to the NannyKeeper API for calculating household employer taxes across all 50 states. Exposes four tools: calculate_nanny_taxes for full federal and state breakdowns, check_threshold to see if wages trigger tax obligations, preview_payroll for dry runs, and run_payroll for end-to-end processing with YTD tracking. Handles the messy state-by-state rules for Social Security, Medicare, FUTA, unemployment, and income tax withholding. Useful if you're building family finance tools, managing payroll for household employers, or just want Claude to stop guessing at nanny tax math. Free tier covers calculations, paid plans add W-2 generation and direct deposit.
claude mcp add --transport stdio nannykeeper-mcp-server -- npx -y @nannykeeper/mcp-server