Personal finance calculators for AI agents — mortgage, compound interest, FIRE, loan comparison, and more. Zero API keys required.
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# 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.** [](https://pypi.org/project/axiom-calculator-mcp/) [](https://opensource.org/licenses/MIT) --- ## 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 | --- ## Install ### Claude Desktop / Claude Code Add to your MCP config: ```json { "mcpServers": { "calculator": { "command": "uvx", "args": ["axiom-calculator-mcp"] } } } ``` ### Any MCP client (stdio) ```bash uvx axiom-calculator-mcp ``` ### From source ```bash git clone https://github.com/vdalhambra/axiom-calculator-mcp cd axiom-calculator-mcp uv run axiom-calculator ``` --- ## 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.…
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