Axiom Calculator MCP
Personal finance calculators for Claude and AI agents — mortgage payments, compound interest, FIRE retirement number, loan comparison, debt payoff, and inflation-adjusted returns.
Zero API keys. Zero setup. Works instantly with any MCP client.
Tools (8 total)
| Tool | What it does |
|---|---|
mortgage_calculator |
Monthly payment, total interest, 12-month amortization schedule |
rent_vs_buy |
Compare total cost of renting vs buying over N years (includes equity, appreciation, opportunity cost) |
compound_interest |
Project investment growth with optional monthly contributions — year-by-year table |
fire_number |
Calculate your FIRE target portfolio and years-to-retirement timeline |
inflation_adjusted_return |
Real vs nominal return — see if your investments actually beat inflation |
loan_comparison |
Compare two loans by total cost, monthly payment, and true APR (including fees) |
true_credit_cost |
Find the real APR of any financing offer, BNPL, or credit product |
debt_payoff_plan |
Payoff timeline and interest saved from extra monthly payments |






