MCP server

BoringToolsKit

io.github.roadtogideon222-byte/boringtoolskit

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

36 free private calculator tools for Claude. No accounts, no data leaves your session.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

36

Token cost

About 5,100 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 boringtoolskit https://boringtoolskit.com/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.boringtoolskit]
url = "https://boringtoolskit.com/mcp"

Gemini CLI

{"mcpServers":{"boringtoolskit":{"httpUrl":"https://boringtoolskit.com/mcp"}}}

Cursor

{"mcpServers":{"boringtoolskit":{"url":"https://boringtoolskit.com/mcp"}}}

VS Code

{"servers":{"boringtoolskit":{"type":"http","url":"https://boringtoolskit.com/mcp"}}}

Antigravity

agy mcp add boringtoolskit https://boringtoolskit.com/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":"boringtoolskit","server_url":"https://boringtoolskit.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"boringtoolskit","server_url":"https://boringtoolskit.com/mcp"}

Tools

• apy ~144 tokens
  Compute annual percentage yield from a nominal rate and a compounding frequency, plus the one year interest and ending balance on an example deposit.
• audio_time_stretch ~104 tokens
  Compute the new duration of audio at a playback speed, plus the percent time change.
• auto_loan ~144 tokens
  Estimate a monthly auto-loan payment from price, down payment, trade-in, term, and APR.
• bmi ~108 tokens
  Calculate body mass index and category from weight and height in US units.
• bmr_tdee ~179 tokens
  Estimate basal metabolic rate (Mifflin-St Jeor) and total daily energy expenditure from age, weight, height, sex, and an activity multiplier.
• boat_loan ~175 tokens
  Boat or RV loan payment with optional sales tax, down payment, and trade-in, including amount financed and total interest.
• budget_50_30_20 ~80 tokens
  Split monthly after-tax income by the 50/30/20 rule into needs, wants, and savings or debt paydown.
• cagr ~136 tokens
  Compute the compound annual growth rate connecting a starting and an ending value over a number of years, with total return percent and absolute change.
• calorie ~174 tokens
  Estimate BMR and total daily energy expenditure using Mifflin-St Jeor, from weight/height in US units.
• ceiling_tile ~100 tokens
  Count 2x2 ft ceiling tiles needed for a rectangular room, with room area and a 5 percent cut-waste reminder.
• combinations ~102 tokens
  Compute the number of distinct combinations, n choose r, using a multiplicative form that avoids factorial overflow.
• compound_interest ~198 tokens
  Grow a balance with compound interest and optional monthly contributions. Returns future value, total contributed, and interest earned.
• discount_percent_off ~180 tokens
  Compute the final checkout total after stacked percentage discounts, a fixed coupon, and a tax assumption. Sequential discounts are NOT additive.
• dividend_reinvestment ~205 tokens
  Compound a portfolio with a constant dividend yield and price growth, reinvesting monthly and optionally adding deposits. Returns ending value, total contributed, and dividends reinvested.
• emergency_fund ~162 tokens
  Emergency fund target (expenses times coverage months), the remaining gap versus current savings, and months to close the gap at a fixed monthly contribution.
• gross_rent_multiplier ~103 tokens
  Gross rent multiplier for a rental property: price divided by annual gross rent. Lower means more rent per dollar of price.
• growing_degree_day ~189 tokens
  Accumulate growing, heating, or cooling degree days (Fahrenheit basis) from daily high, low, a base threshold, and a day count. Includes Celsius-basis totals.
• insulation ~160 tokens
  U-value of an insulation upgrade and an estimated annual heating saving from conduction, using heating degree days, area, kWh conversion, and utility cost.
• key_transposition ~135 tokens
  Transpose a musical key and report the number of semitone steps upward between two keys.
• maintenance_calories ~196 tokens
  Daily maintenance calories (TDEE) from Mifflin-St Jeor BMR and an activity level, using metric inputs.
• margin_of_error ~118 tokens
  Compute the margin of error for a survey sample at the 90, 95, or 99 percent confidence level, assuming maximum variance proportions.
• mortgage_payment ~242 tokens
  Estimate the full monthly housing payment (principal, interest, tax, insurance, PMI, HOA) and the total interest over the term. Requires a positive home price.
• percentage ~118 tokens
  Solve percentage problems: what is X% of Y, X is what % of Y, or the % change from X to Y.
• pressure ~97 tokens
  Compute pressure in Pascals, kilopascals, and psi from a force in newtons over an area in square metres.
• protein_molecular_weight ~128 tokens
  Estimate a protein chain molecular weight in Da and kDa from residue count and average residue mass, plus peptide bond count.
• remainder ~89 tokens
  Compute the remainder and floored quotient of a division. Works for decimal inputs, not just integers.
• roofing ~147 tokens
  Roof area from footprint and pitch, with waste allowance, roofing squares, and approximate shingle bundles (3 per square).
• rule_of_72 ~101 tokens
  Estimate the doubling time of money at a fixed rate using the rule of 72, plus the exact doubling time from the compound formula. Rate must be between 0 and 30 percent.
• savings_growth ~137 tokens
  Project the future value of a lump-sum investment (optionally with monthly additions), including interest earned.
• simple_interest ~109 tokens
  Compute simple interest, total value, and a comparison to annual compounding.
• slope ~97 tokens
  Compute slope from rise and run as degrees, percent grade, and the rise to run ratio. Run must be above zero.
• square_footage ~156 tokens
  Compute total area (and with-waste area) from up to two rectangular spaces, plus square yards, square metres, and acres.
• tip_bill_split ~214 tokens
  Split a bill across a group after tax, tip, and optional rounding. Returns each person's share, the tip, the effective tip rate, and the collected total.
• va_mortgage ~147 tokens
  Monthly VA loan payment including the funding fee, with no PMI. Returns the financed amount, payment, and total interest.
• win_loss_percentage ~110 tokens
  Compute a winning percentage from wins, losses, and ties, where ties count as half a win.
• youtube_revenue ~116 tokens
  Estimated YouTube Adsense revenue from monthly views and RPM, with an annual figure and a 30 percent RPM swing range. RPM defaults to 2 when omitted.

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