io.github.inity13/precisioncalc-mcp

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

High-precision finance & business calculations for AI agents — exact decimals, never floats.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "precisioncalc-mcp": {
      "url": "https://precisioncalc-mcp.pages.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (11)

• calculate_metric

  Compute a business/SaaS/finance metric with exact decimal precision. Metrics: ltv, cac, ltv_cac_ratio, payback_period_months, contribution_margin, gross_margin, churn_rate, mrr_growth_rate, arr, break_even_units, nrr, grr, rule_of_40, magic_number. Rates/margins are decimals (0.05=5%). Call list_metrics for schemas.

  Parameters:

  • metric (required) — string
  • params (required) — object
  • currency — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_metrics

  List every supported metric with descriptions and required/optional params.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• currency_convert

  Convert an amount between major currencies (USD, EUR, GBP, JPY, CAD, AUD, CHF, CNY, INR) with Decimal precision. Static offline table on the free tier; live/historical ECB rates (date/live=true) require a paid plan.

  Parameters:

  • amount (required) — number
  • from_currency (required) — string
  • to_currency (required) — string
  • date — string
  • live — boolean

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• business_days

  Business-day arithmetic honoring weekends + regional holidays. operation: add_business_days (needs days, negative ok) | count_business_days (needs end_date, inclusive) | next_business_day | previous_business_day. region: US | UK | EU | NONE. custom_holidays: list of YYYY-MM-DD.

  Parameters:

  • operation (required) — string
  • start_date (required) — string
  • days — integer
  • region — string
  • end_date — string
  • custom_holidays — array

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• compound_growth

  Compound-interest/growth math. operation: future_value (rate, years, present_value) | present_value (rate, years, future_value) | cagr (begin_value, end_value, years). rate is annual decimal (0.08=8%). compounding: daily|weekly|monthly|quarterly|semiannually|annually|continuous.

  Parameters:

  • operation (required) — string
  • rate — number
  • years — number
  • currency — string
  • end_value — number
  • begin_value — number
  • compounding — string
  • future_value — number
  • present_value — number

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• net_present_value

  Net Present Value (discounted cash flow). NPV = sum(CF_t/(1+rate)^t). cashflows[0] = period 0 (usually the negative outlay).

  Parameters:

  • rate (required) — number
  • cashflows (required) — array
  • currency — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• internal_rate_of_return

  Internal Rate of Return: per-period rate where NPV=0 (Newton + bisection). Requires a sign change in cashflows.

  Parameters:

  • cashflows (required) — array
  • guess — number

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• loan_amortization

  Level-payment loan: monthly payment, total interest, payoff, and (optional) full schedule. payment = P*r/(1-(1+r)^-n), r=annual_rate/12.

  Parameters:

  • principal (required) — number
  • annual_rate (required) — number
  • term_months (required) — integer
  • currency — string
  • extra_payment — number
  • include_schedule — boolean

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• depreciation

  Asset depreciation schedule. method: straight_line | declining_balance | sum_of_years_digits. Book value converges to salvage_value.

  Parameters:

  • method (required) — string
  • cost (required) — number
  • salvage_value (required) — number
  • useful_life_years (required) — integer
  • currency — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• batch_calculate

  PAID FEATURE. Run many calculations in one request. calls: list of {tool, arguments} (max 100). One failure never aborts the batch.

  Parameters:

  • calls (required) — array

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• health_check

  Server health/status metadata.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

Repository

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