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For Real Estate Investors

Underwrite a deal with the same math every time.

Mortgage payments, amortization, rent-vs-buy, cap-rate-adjacent NPV/IRR, depreciation schedules — underwriting a rental or a flip means running the same handful of calculations repeatedly. Call them directly instead of rebuilding the spreadsheet.

12 tools for real estate investors

finance
Mortgage Payment Calculator
Monthly principal+interest, PMI, taxes, insurance and full amortization for a home loan.
personal-finance
Rent vs Buy Calculator
Compare the N-year net cost of buying (mortgage, tax, upkeep, minus equity) vs renting, and find the breakeven year.
finance
Loan Amortization Schedule
Full month-by-month amortization table with principal, interest, and balance columns.
finance
Loan / Amortization Calculator
Monthly payment, total paid and total interest for an amortizing loan.
finance
ROI & Annualized Return Calculator
Return on investment, gain and (with a holding period) annualized ROI.
valuation
Net Present Value (NPV) Calculator
NPV of a cash-flow series at a discount rate (index 0 = initial outlay).
valuation
Internal Rate of Return (IRR) Calculator
The discount rate where NPV=0 for a cash-flow series (solved by bisection).
finance
CAGR (Compound Annual Growth Rate) Calculator
Compound annual growth rate and total growth between two values over N years.
finance
Depreciation Schedule Calculator
Straight-line or double-declining-balance schedule for an asset.
finance
Progressive Tax Calculator
Total tax, effective and marginal rate from a marginal bracket table.
personal-finance
Net Worth Calculator
Total assets minus liabilities, plus liquid net worth and debt-to-asset ratio.
trades
Contractor Bid Estimator
Build a client job bid from cost components: labor hours x rate + materials + equipment + subs, then overhead,…

Install

One command wires up every tool below for Claude Code:

claude mcp add --transport http wingman https://agent.wingmanprotocol.com/mcp

Claude Desktop, Cursor and Continue configs are on /install. A free key adds 10,000 calls a month, no card: /pricing, which also has the current prices.