vdalhambra/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.**
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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 |
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Install
Claude Desktop / Claude Code
Add to your MCP config:
Any MCP client (stdio)
From source
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Example usage
Once connected, just ask Claude naturally:
> *"I'm looking at a $450,000 house with 20% down at 6.8% for 30 years. What's my monthly payment and total interest?"*
> *"Compare a 15-year loan at 6.2% vs 30-year at 6.8% for $380,000. Which is better overall?"*
> *"I spend $48,000/year. How much do I need to retire, and how long will it take if I save $24,000/year?"*
> *"I have $8,500 in credit card debt at 22% APR. How long to pay it off at $250/month, and how much do I save if I add $100/month extra?"*
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Why this exists
Most finance calculators are either locked behind paywalls, require accounts, or are ad-stuffed websites. This MCP gives Claude direct access to accurate financial math — no API keys, no rate limits, no middleman.