BoringToolsKit
36 calculators for bills, mortgages, savings, health, home projects, and music without accounts or data collection.
Private calculator tools for splitting bills, mortgages, auto loans, compound interest, BMI, calorie needs, property valuation, roofing, insulation, and other household and financial estimates. All computation stays in your session.
Try asking Muse: "Calculate how much each person owes after splitting a restaurant bill with tax and tip."
See the most upvoted connectors
Source: Found in the official MCP Registry (io.github.roadtogideon222-byte/boringtoolskit) · First listed October 29, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 54 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://boringtoolskit.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
BoringToolsKit is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://boringtoolskit.com/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 329ms. Worked in 100% of checks over 30 days.
Screening · October 29, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 36
tip_bill_splitSplit 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.discount_percent_offCompute the final checkout total after stacked percentage discounts, a fixed coupon, and a tax assumption. Sequential discounts are NOT additive.bmiCalculate body mass index and category from weight and height in US units.bmr_tdeeEstimate basal metabolic rate (Mifflin-St Jeor) and total daily energy expenditure from age, weight, height, sex, and an activity multiplier.mortgage_paymentEstimate the full monthly housing payment (principal, interest, tax, insurance, PMI, HOA) and the total interest over the term. Requires a positive home price.auto_loanEstimate a monthly auto-loan payment from price, down payment, trade-in, term, and APR.compound_interestGrow a balance with compound interest and optional monthly contributions. Returns future value, total contributed, and interest earned.savings_growthProject the future value of a lump-sum investment (optionally with monthly additions), including interest earned.simple_interestCompute simple interest, total value, and a comparison to annual compounding.calorieEstimate BMR and total daily energy expenditure using Mifflin-St Jeor, from weight/height in US units.percentageSolve percentage problems: what is X% of Y, X is what % of Y, or the % change from X to Y.square_footageCompute total area (and with-waste area) from up to two rectangular spaces, plus square yards, square metres, and acres.apyCompute annual percentage yield from a nominal rate and a compounding frequency, plus the one year interest and ending balance on an example deposit.win_loss_percentageCompute a winning percentage from wins, losses, and ties, where ties count as half a win.slopeCompute slope from rise and run as degrees, percent grade, and the rise to run ratio. Run must be above zero.rule_of_72Estimate 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.cagrCompute the compound annual growth rate connecting a starting and an ending value over a number of years, with total return percent and absolute change.remainderCompute the remainder and floored quotient of a division. Works for decimal inputs, not just integers.combinationsCompute the number of distinct combinations, n choose r, using a multiplicative form that avoids factorial overflow.margin_of_errorCompute the margin of error for a survey sample at the 90, 95, or 99 percent confidence level, assuming maximum variance proportions.va_mortgageMonthly VA loan payment including the funding fee, with no PMI. Returns the financed amount, payment, and total interest.gross_rent_multiplierGross rent multiplier for a rental property: price divided by annual gross rent. Lower means more rent per dollar of price.emergency_fundEmergency fund target (expenses times coverage months), the remaining gap versus current savings, and months to close the gap at a fixed monthly contribution.dividend_reinvestmentCompound a portfolio with a constant dividend yield and price growth, reinvesting monthly and optionally adding deposits. Returns ending value, total contributed, and dividends reinvested.budget_50_30_20Split monthly after-tax income by the 50/30/20 rule into needs, wants, and savings or debt paydown.growing_degree_dayAccumulate growing, heating, or cooling degree days (Fahrenheit basis) from daily high, low, a base threshold, and a day count. Includes Celsius-basis totals.insulationU-value of an insulation upgrade and an estimated annual heating saving from conduction, using heating degree days, area, kWh conversion, and utility cost.roofingRoof area from footprint and pitch, with waste allowance, roofing squares, and approximate shingle bundles (3 per square).maintenance_caloriesDaily maintenance calories (TDEE) from Mifflin-St Jeor BMR and an activity level, using metric inputs.protein_molecular_weightEstimate a protein chain molecular weight in Da and kDa from residue count and average residue mass, plus peptide bond count.key_transpositionTranspose a musical key and report the number of semitone steps upward between two keys.audio_time_stretchCompute the new duration of audio at a playback speed, plus the percent time change.youtube_revenueEstimated 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.ceiling_tileCount 2x2 ft ceiling tiles needed for a rectangular room, with room area and a 5 percent cut-waste reminder.boat_loanBoat or RV loan payment with optional sales tax, down payment, and trade-in, including amount financed and total interest.pressureCompute pressure in Pascals, kilopascals, and psi from a force in newtons over an area in square metres.Recent checks
Link
https://boringtoolskit.com/mcpQuestions about BoringToolsKit in Muse
How do I connect BoringToolsKit to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use BoringToolsKit to help me. It is a free service with an MCP server at https://boringtoolskit.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is BoringToolsKit working right now?
At the last check (October 29, 2026, 11:00 UTC) the endpoint was working, answering in 329ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is BoringToolsKit safe to connect to Muse?
It was screened on October 29, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can BoringToolsKit do in Muse?
It exposes 36 tools, including tip_bill_split, discount_percent_off, bmi, bmr_tdee. For example, you could ask Muse: "Calculate how much each person owes after splitting a restaurant bill with tax and tip."
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