Calcnook

PyPI License: MIT Python

MCP server wrapping the calcnook financial engine. Gives any MCP-compatible AI agent (Claude Code, Cursor, Goose, Continue, etc.) native access to 17 calculation tools across compound interest, SIP/DCA, loans, retirement planning, BMI/BMR, Islamic finance, income tax (US/UK/CA/AU/India), VAT, End of Service Gratuity, and more.

Install

Preferred — zero setup via uvx:

uvx calcnook-mcp

Or pip:

pip install calcnook-mcp
calcnook-mcp

Configure your AI agent

Claude Desktop / Claude Code

Add to claude_desktop_config.json (or your MCP settings):

{
  "mcpServers": {
    "calcnook": {
      "command": "uvx",
      "args": ["calcnook-mcp"]
    }
  }
}

Cursor

{
  "mcpServers": {
    "calcnook": {
      "command": "uvx",
      "args": ["calcnook-mcp"]
    }
  }
}

Goose / Continue

Use the same JSON block in the respective mcp_servers config section.

Tools

Tool	What it does	Example query
calculate_compound_interest	Future value of a lump-sum at compound interest	"What will ₹1L grow to in 10 years at 7%?"
calculate_sip_dca	SIP (India) / DCA (global) with optional annual step-up	"SIP ₹5000/month for 15 years at 12%"
calculate_loan_payment	EMI / mortgage amortization with optional extra payment	"EMI for ₹30L home loan at 8.5% for 20 years"
calculate_retirement	Corpus needed, monthly SIP to reach corpus, safe withdrawal (4% rule)	"How much SIP to reach 2Cr in 20 years?"
calculate_bmi_bmr_tdee	BMI + WHO category, BMR (Mifflin-St Jeor), TDEE	"BMI for 70kg 175cm"
convert_currency	Convert between any currencies using caller-supplied rates	"Convert $1000 to INR at 83.5"
format_currency_amount	Format amount as currency string; INR supports lakh/crore	"Show 25000000 as crores"
calculate_zakat	Zakat al-Mal (2.5% wealth obligation): all asset categories, nisab check	"Zakat on $25k savings + $5k stocks"
calculate_islamic_financing	Murabaha, Ijarah, or Mudarabah financing calculator	"Murabaha for $100k house at 30% markup over 5 years"
calculate_hajj_savings	Monthly savings needed to fund Hajj by target year	"Save monthly for Hajj costing $8000 in 5 years"
screen_halal_stock	AAOIFI Sharia compliance screen (debt, cash, receivables, haram revenue ratios)	"Is this tech stock halal given these financials?"
calculate_income_tax	Federal/national income tax for US, UK, CA, AU, India (2026)	"India income tax on ₹12L new regime"
calculate_us_retirement_account	Traditional 401(k) contribution analysis or Roth IRA phase-out check	"Am I eligible for Roth IRA at $155k income?"
calculate_eosg	End of Service Gratuity for UAE or Saudi Arabia	"UAE gratuity for 7 years at AED 8000 basic salary"
calculate_vat	VAT for UAE (5%) or Saudi Arabia (15%)	"UAE VAT on AED 1000 product"
calculate_saudi_zakat_citizen	ZATCA-collected Zakat estimate for Saudi/GCC nationals (2.5% of base)	"Saudi corporate zakat on SAR 1M base"
calculate_india_electricity_bill	India electricity bill with BESCOM/MSEB/BSES presets or custom slabs	"BESCOM bill for 250 units in Bangalore"

Built on

calcnook engine — the open-source personal finance calculation library.

DISCOM presets (BESCOM_RESIDENTIAL, MSEB_RESIDENTIAL, BSES_RESIDENTIAL) are importable directly from calcnook.countries.india.electricity_bill for custom slab configuration.

License

MIT