True Finance Calc
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Give your AI the power of True Finance Math

All 31 calculators are published to your browser as Model Context Protocoltools. Any AI agent that supports WebMCP can discover them and run our exact formulas — right on the page you're reading.

How it works

Every page on this site registers its calculators with the browser's WebMCP API (navigator.modelContext). If you browse with an AI-enabled browser or an agent extension that speaks WebMCP, the tools below appear automatically — no setup, no configuration file, and no API key.

what your agent sees
> calculate_mortgage({
    homePrice: 400000,
    downPaymentPercentage: 20,
    interestRate: 6.5,
    loanTermYears: 30
  })

< {
    "summary": "Total monthly payment ... (P&I ...).
                Total interest ... Paid off in ... years.",
    "details": {
      "monthlyPi": ..., "monthlyTaxesAndFees": ...,
      "totalInterest": ..., "totalCost": ...,
      "schedule": [ /* year-by-year amortization */ ]
    }
  }

Free, with no API keysAsk your agent to "calculate my mortgage" while this site is open and it will call our exact formulas instead of estimating the math itself.

Runs entirely on your deviceThese tools execute in your browser tab. There is no hosted calculation endpoint, so the numbers you or your agent enter are never transmitted to us.

Agents without WebMCP supportDesktop clients that connect over stdio or HTTP can't reach an in-browser tool. For those, open the calculator you need and export the result as PDF or CSV. The Mortgage, Compound Interest, and Investment ROI calculators also keep their inputs in the URL, so a link reproduces the exact scenario.

All 31 tools

View all 31 calculators