MCP server

Nestegg Calculators

io.github.VladimirWrites/nestegg-calculators

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

90+ pure finance calculators: loans, investing, bonds, options, tax. Stateless, stores nothing.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

99

Token cost

About 16,697 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http nestegg-calculators https://nestegg.money/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.nestegg-calculators]
url = "https://nestegg.money/mcp"

Gemini CLI

{"mcpServers":{"nestegg-calculators":{"httpUrl":"https://nestegg.money/mcp"}}}

Cursor

{"mcpServers":{"nestegg-calculators":{"url":"https://nestegg.money/mcp"}}}

VS Code

{"servers":{"nestegg-calculators":{"type":"http","url":"https://nestegg.money/mcp"}}}

Antigravity

agy mcp add nestegg-calculators https://nestegg.money/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"nestegg-calculators","server_url":"https://nestegg.money/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"nestegg-calculators","server_url":"https://nestegg.money/mcp"}

Tools

• accrued-interest ~171 tokens
  Accrued interest since the last coupon: the annual coupon pro-rated by days elapsed over the day-count basis.
• after-tax-yield ~105 tokens
  After-tax yield: a yield reduced by the tax rate. Percents in and out.
• amortization ~637 tokens
  Monthly loan amortization schedule and summary. Supports dated extra principal payments and a rate-fixed period. detail controls output size: 'summary' (default) returns totals plus a per-year breakdown; 'monthly' returns the full schedule (paginate with offset/limit). Returns numbers and schedules;
• annuity-fv ~124 tokens
  Future value of an ordinary annuity. rate is the per-period rate in percent.
• annuity-payment ~140 tokens
  The level payment that amortizes a present value over n periods (the loan-payment formula). rate is per period.
• annuity-pv ~134 tokens
  Present value of an ordinary annuity (level payment at each period end). rate is the per-period rate in percent.
• balloon-loan ~170 tokens
  Balloon loan: payment based on a long amortization, with the balloon being the balance still due after the shorter balloon term.
• barista-fire ~159 tokens
  Barista FIRE: the nest egg needed when part-time income covers part of the spending, so the portfolio only funds the remainder at the safe withdrawal rate.
• biweekly-payoff ~145 tokens
  Biweekly mortgage acceleration: paying half the monthly payment every two weeks. Returns the biweekly payment and the months and interest saved.
• black-scholes ~247 tokens
  Black-Scholes price of a European call or put option, plus d1/d2. Volatility and rates in percent; optional continuous dividend yield.
• bond-duration ~188 tokens
  Macaulay duration (PV-weighted average time of cashflows, in years) and modified duration (price sensitivity to yield).
• bond-price ~183 tokens
  Price of a coupon bond given a yield: present value of the coupons plus the face at maturity.
• break-even-units ~151 tokens
  Break-even volume: fixed costs divided by the per-unit contribution (price - variable cost), plus the revenue at that volume.
• budget-50-30-20 ~86 tokens
  The 50/30/20 budget split of monthly income into needs, wants, and savings.
• cagr ~120 tokens
  Compound annual growth rate between two values over a number of years. Returns a decimal (0.07 means 7%).
• cap-rate ~100 tokens
  Capitalization rate: net operating income as a percent of property value.
• cash-on-cash ~110 tokens
  Cash-on-cash return: annual pre-tax cash flow as a percent of the cash invested.
• coast-fire ~230 tokens
  Coast FIRE: whether the current nest egg, left to grow untouched to retirement, already reaches the FIRE target. Returns the target, the projected balance, whether it coasts, and any shortfall.
• compound-interest ~216 tokens
  Compound growth at any frequency, with an optional contribution each period (paid at period end). Generalizes future-value (periodsPerYear 1) and contributions (periodsPerYear 12).
• contribution-margin ~110 tokens
  Contribution margin per unit and as a percent of price.
• contributions ~159 tokens
  Future value of a fixed monthly contribution, optionally stepping up each year.
• convexity ~180 tokens
  Bond convexity (years^2): the curvature of price with respect to yield, used alongside duration.
• credit-card-payoff ~152 tokens
  Months to clear a credit-card balance at a fixed monthly payment, plus interest paid. Null when the payment can't cover the first month's interest.
• current-ratio ~105 tokens
  Current ratio: current assets over current liabilities.
• current-yield ~129 tokens
  Current yield: the annual coupon as a percent of the bond's current price.
• de-abgeltungsteuer ~284 tokens
  German flat tax on capital income (Abgeltungsteuer, §32d EStG) for tax years 2023-2026 with the year's Sparerpauschbetrag built in. 25% above the allowance, Soli 5.5% on top (no Freigrenze for capital income), and with church tax the statutory reduced rate (e.g. 24.45% at 9%) plus the church tax its
• de-gross-to-net ~465 tokens
  German net (Netto) salary from gross (Brutto). No tax tables are baked in: look up the current year's statutory figures and pass them in. Income tax (Lohnsteuer) and Soli are amounts; church tax is a percent of the income tax; the four employee social rates and the two contribution ceilings are inpu
• de-kindergeld ~123 tokens
  German child benefit (Kindergeld) for 2023-2026: the year's flat monthly amount per child (uniform since 2023), as monthly and annual totals.
• de-midijob ~333 tokens
  German Midijob / Uebergangsbereich (paragraph 20 Abs. 2a SGB IV) for 2023-2026: classifies a monthly pay as Minijob / Midijob / regular against the year's thresholds and, inside the Midijob band, computes the reduced contribution bases (Faktor F from the year's rates) and the employee vs employer so
• de-net-salary ~675 tokens
  Exact German net (Netto) salary from annual gross (Brutto) for tax years 2023-2026. Income tax and Soli follow the official BMF Programmablaufplan for the year (to the euro; 2024 uses the retroactive December tariff), church tax comes from the PAP's Kirchensteuer base, and employee social insurance
• de-rentenpunkte ~250 tokens
  German pension points (Entgeltpunkte, paragraph 63 SGB VI) for 2023-2026: points earned from an annual gross via the year's Durchschnittsentgelt (capped at the contribution ceiling), the aktueller Rentenwert for both halves of the year, and optionally the gross monthly state pension for a total poin
• debt-payoff ~294 tokens
  Multi-debt payoff plan under a fixed monthly budget. method 'avalanche' (highest rate first) minimizes interest; 'snowball' (smallest balance first) clears accounts soonest. Returns months, total interest, and payoff order; flags insolvent budgets.
• declining-balance-depreciation ~150 tokens
  Declining-balance depreciation: a fixed percent of the reducing book value, for a given year. Returns that year's depreciation and the remaining book value.
• depreciate ~163 tokens
  Value after compounding down (or up) at a yearly percentage rate over a number of years. This is the method the app uses for long-term assets.
• discount ~98 tokens
  A single percentage discount: the amount off and the final price.
• discounted-payback ~146 tokens
  Discounted payback period: like payback-period but each cashflow is discounted at the per-period rate.
• dollar-cost-averaging ~151 tokens
  Dollar-cost averaging: buying a fixed amount each period at the given prices. Returns units accumulated, total invested, average cost, and final value at the last price.
• double-declining-depreciation ~154 tokens
  Double-declining-balance depreciation: 2/usefulYears of the book value each year, not falling below salvage.
• dscr ~105 tokens
  Debt service coverage ratio: net operating income divided by annual debt service.
• dti ~108 tokens
  Debt-to-income ratio, percent (monthly debt / gross monthly income).
• effective-rate ~185 tokens
  Convert a nominal annual rate to the effective annual rate (APY) for a compounding frequency, or with toNominal recover the nominal rate from an APY.
• emergency-fund ~111 tokens
  Months of runway: liquid savings divided by monthly expenses.
• fee-drag ~159 tokens
  Effect of an annual fee: the compounded balance at the gross rate vs net of the fee, and the amount lost to fees.
• fire-number ~236 tokens
  FIRE target nest egg from annual spend and a safe withdrawal rate (default 4%), plus the gap from today and the years to reach it given optional savings and growth. No advice.
• future-value ~121 tokens
  Future value of a single lump sum compounded annually.
• fx-convert ~118 tokens
  Convert an amount using a rate supplied by the caller (units of target currency per unit of source). No rate is ever looked up.
• gross-rent-multiplier ~101 tokens
  Gross rent multiplier: price divided by gross annual rent.
• holding-period-return ~128 tokens
  Holding-period return: (income + capital gain) / starting value, in percent.
• hourly-to-salary ~120 tokens
  Annualize an hourly rate (and the monthly equivalent).
• inflation-adjust ~183 tokens
  Convert a nominal amount to today's purchasing power (real), or with toNominal inflate a real amount forward, at a given annual inflation rate.
• interest-only-payment ~96 tokens
  Interest-only monthly payment on a balance.
• intrinsic-time-value ~147 tokens
  Split an option premium into intrinsic value (in-the-money amount) and time value.
• irr ~120 tokens
  Internal rate of return: the per-period rate that zeroes the NPV of a cashflow series. Returns a percent, or null when the series never crosses zero.
• loan-apr ~167 tokens
  Effective APR including upfront fees: the note-rate payment priced against the net proceeds (amount - fees). Annual percent.
• loan-payoff ~369 tokens
  Time and interest saved by paying a fixed extra amount every month on a loan, versus the baseline schedule.
• ltv ~94 tokens
  Loan-to-value ratio, percent (loan / property value).
• margin-markup ~163 tokens
  Convert between margin and markup. Supply any one of cost/price plus one of marginPct/markupPct (or both cost and price); returns cost, price, profit, marginPct, and markupPct.
• max-drawdown ~99 tokens
  Maximum drawdown of a value series: the largest peak-to-trough decline, as a positive percent.
• mirr ~166 tokens
  Modified internal rate of return: negatives financed at financeRate, positives reinvested at reinvestRate. Percents in and out.
• mortgage-affordability ~262 tokens
  Maximum loan and home price the income supports: the DTI cap on gross monthly income (less existing debts) sets the payment, whose present value at the rate and term is the loan.
• net-worth ~89 tokens
  Net worth: assets minus liabilities.
• noi ~140 tokens
  Net operating income: gross rental income less vacancy and operating expenses.
• npv ~139 tokens
  Net present value of a cashflow series (index 0 is today; outflows negative) discounted at a per-period rate.
• option-breakeven ~132 tokens
  Break-even underlying price at expiry: strike + premium for a call, strike - premium for a put.
• option-greeks ~241 tokens
  Black-Scholes greeks for a European option: delta, gamma, vega (per 1% vol), theta (per day), rho (per 1% rate).
• payback-period ~129 tokens
  Simple payback period: periods until cumulative cashflows recover the initial cost, interpolated within the crossing period. Null if never.
• percentage-change ~97 tokens
  Percentage change from one value to another. Null when the starting value is zero.
• perpetuity ~142 tokens
  Present value of a level or growing perpetuity: payment / (rate - growth). Null when growth is not below the rate.
• points-breakeven ~199 tokens
  Mortgage points break-even: the upfront cost to buy down the rate, the monthly payment saving, and the whole months to recoup it.
• portfolio-longevity ~217 tokens
  How many years a balance lasts while withdrawing from it: the balance grows each year, then the withdrawal (optionally stepping up) is taken. Returns the depletion year, or sustainable=true when it outlasts 200 years.
• present-value ~146 tokens
  Present value of a single future amount discounted annually. The inverse of future-value.
• put-call-parity ~228 tokens
  Put-call parity: given one option price, returns both. Provide call or put, plus spot, strike, years, and the rate.
• quick-ratio ~131 tokens
  Quick (acid-test) ratio: (current assets - inventory) over current liabilities.
• real-return ~126 tokens
  Real (inflation-adjusted) return from a nominal rate via the Fisher relation: (1+nominal)/(1+inflation) - 1.
• refi-breakeven ~193 tokens
  Refinance break-even: monthly saving, whole months to recoup closing costs, and (if remainingMonths given) the net saving over the remaining term.
• required-contribution ~179 tokens
  Inverse of contributions: the fixed monthly amount needed to reach a target future value over a number of months, given an optional starting balance.
• required-return ~184 tokens
  Annual return needed to grow a starting value to a target over a number of years, optionally with a fixed annual contribution. With no contribution this equals CAGR. Returns a percent, or null when unreachable.
• return-stats ~110 tokens
  Mean, sample variance, and sample standard deviation (n-1) of a series of returns. Pass percents to get a percent stdev (volatility).
• roa ~93 tokens
  Return on assets, percent: net income over total assets.
• roe ~94 tokens
  Return on equity, percent: net income over shareholders' equity.
• roi ~136 tokens
  Return on investment: total percent gain, plus the annualized rate when a holding period in years is given.
• rule-of-72 ~85 tokens
  Years to double: the rule-of-72 estimate (72/rate) and the exact figure (ln2 / ln(1+rate)).
• salary-to-hourly ~117 tokens
  Hourly rate implied by an annual salary.
• savings-rate ~95 tokens
  Fraction of income saved (savings divided by income). Returns a decimal.
• sharpe-ratio ~131 tokens
  Sharpe ratio: excess mean return per unit of volatility, (mean - riskFree) / stdev. Null when volatility is undefined or zero.
• straight-line-depreciation ~152 tokens
  Straight-line depreciation: value falling evenly to a salvage value over a useful life.
• successive-discounts ~122 tokens
  Stacked discounts applied in order: the final price and the effective single discount rate.
• sum-of-years-digits ~146 tokens
  Sum-of-the-years'-digits depreciation: the depreciable base weighted toward the early years.
• tax-equivalent-yield ~123 tokens
  Tax-equivalent yield: the taxable yield that matches a tax-free (e.g. muni) yield. Percents in and out.
• tax-from-brackets ~211 tokens
  Progressive tax from caller-supplied brackets. No jurisdiction, year, or rates are baked in: pass the brackets yourself. Returns total tax, effective rate, and marginal rate.
• tip-split ~117 tokens
  Tip and split: the tip amount, the total, and the per-person share.
• unit-price ~101 tokens
  Unit price: price divided by quantity (for comparing pack sizes). Null when quantity is zero.
• units-of-production-depreciation ~173 tokens
  Units-of-production depreciation: the depreciable base spread over total expected units, charged by the units used this period.
• vat ~178 tokens
  Value-added tax (MwSt/USt, sales tax) on a price. By default adds the tax to a net price; with inclusive=true treats the amount as gross and extracts the tax. The rate is always an input (19 or 7 for Germany, etc.).
• wacc ~184 tokens
  Weighted average cost of capital: equity and after-tax debt weighted by the capital structure. Percents in and out.
• xirr ~160 tokens
  Date-aware internal rate of return: the annual rate that zeroes the XNPV of irregular dated cashflows. Null if no rate fits.
• xnpv ~194 tokens
  Date-aware net present value: each amount discounted by its fractional years (act/365) from the first cashflow's date. Annual rate in percent.
• yield-to-maturity ~218 tokens
  Bond yield to maturity: the nominal annual yield that prices a bond at the given price, with periodic coupons and face returned at maturity. Solved numerically. Returns a percent, or null.
• zero-coupon-price ~150 tokens
  Price of a zero-coupon bond: face value discounted to today at the yield.

Browse

• GitHub tools
• Payments
• GitHub and code hosting

Related MCP servers

• SmartFin
  Backtest S&P 500 stocks and ETFs on real prices, plus loan, savings, FIRE and retirement tools.
• TradingCalc MCP: Options, Forex, Risk Stats, Prediction Markets, On-Chain & Crypto Futures
  Deterministic options, forex, risk, on-chain & futures math. 77 tools. Not AI estimates.
• Senaro Personal Finance
  Credit card payoff, mortgages, refinancing, 401(k), rent vs buy. Every rule and default is cited.
• Fi-Plan
  Financial simulator for Indian salaries: loans, taxes, SIPs and 50-year FIRE plans.
• EveryCalc
  69 free finance, military, school and everyday calculators as MCP tools.
• MaCalculatriceEnLigne
  Calculatrices francaises : salaire net, SMIC, impots, bareme kilometrique, TVA, conversions.
• Calculate.co.nz NZ Calculators
  Search and run New Zealand tax, KiwiSaver, mortgage and property calculators
• CalcBright Calculators
  160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/io.github.VladimirWrites/nestegg-calculators.svg)](https://aptlynx.net/servers/io.github.VladimirWrites/nestegg-calculators)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents