# SmartTools Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## SmartTools

70+ free calculators and unit converters for finance, health, travel and everyday math

- Record: https://musedirectory.ai/connector/smarttools
- Category: Productivity
- Developer: smart-tools.xyz (https://smart-tools.xyz/en/mcp)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 885ms, checked 2026-09-28T09:16:02Z
- Endpoint: https://smart-tools.xyz/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-25T01:06:17Z)
- Source: Found in the official MCP Registry (io.github.9thShini/smart-tools) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.9thShini%2Fsmart-tools

Collection of calculators and converters covering units (length, weight, temperature, area, volume, speed, pressure, energy, data, time), finance (loans, mortgages, compound interest, VAT, tips, discounts, salary), health (BMI, body fat, ideal weight, pregnancy due date), and utilities (age, date math, aspect ratio, statistics, fractions, triangles, running pace, subnets, colors, GPA, scientific expressions).

Example request: "How much will my monthly mortgage payment be if I buy a 300,000 dollar house at 6 percent interest over 30 years?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use SmartTools to help me. It is a free service with an MCP server at https://smart-tools.xyz/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.

Tools:
- length_converter: Convert a value between length units. Units: km (Kilometer), m (Meter), cm (Centimeter), mm (Millimeter), µm (Micrometer), mi (Mile), yd (Yard), ft (Foot), in (Inch), nmi (Nautical mile). Calculation runs on smart-tools.xyz.
- weight_converter: Convert a value between weight units. Units: t (Tonne), kg (Kilogram), g (Gram), mg (Milligram), lb (Pound), oz (Ounce), st (Stone). Calculation runs on smart-tools.xyz.
- temperature_converter: Convert a value between temperature units. Units: °C (Celsius), °F (Fahrenheit), K (Kelvin), °R (Rankine). Calculation runs on smart-tools.xyz.
- area_converter: Convert a value between area units. Units: km² (Square kilometer), m² (Square meter), cm² (Square centimeter), mm² (Square millimeter), ha (Hectare), ac (Acre), mi² (Square mile), ft² (Square foot), yd² (Square yard), in² (Square inch). Calculation runs on smart-tools.xyz.
- volume_converter: Convert a value between volume units. Units: m³ (Cubic meter), L (Liter), mL (Milliliter), gal_us (US gallon), gal_uk (UK gallon), qt (US quart), pt_us (US pint), pt_uk (UK pint), cup (US cup), fl oz (US fluid ounce). Calculation runs on smart-tools.xyz.
- speed_converter: Convert a value between speed units. Units: m/s (Meter per second), km/h (Kilometer per hour), mph (Mile per hour), ft/s (Foot per second), kn (Knot). Calculation runs on smart-tools.xyz.
- pressure_converter: Convert a value between pressure units. Units: Pa (Pascal), kPa (Kilopascal), hPa (Hectopascal), bar (Bar), atm (Atmosphere), psi (Pound per sq inch), mmHg (Millimeter of mercury), inHg (Inch of mercury). Calculation runs on smart-tools.xyz.
- angle_converter: Convert a value between angle units. Units: ° (Degree), rad (Radian), grad (Gradian), mrad (Milliradian), rev (Turn), ′ (Arcminute), ″ (Arcsecond). Calculation runs on smart-tools.xyz.
- energy_converter: Convert a value between energy units. Units: J (Joule), kJ (Kilojoule), cal (Calorie), kcal (Kilocalorie), Wh (Watt-hour), kWh (Kilowatt-hour), BTU (British thermal unit), ft·lb (Foot-pound), eV (Electronvolt). Calculation runs on smart-tools.xyz.
- data_converter: Convert a value between data units. Units: bit (Bit), B (Byte), kB (Kilobyte), MB (Megabyte), GB (Gigabyte), TB (Terabyte), KiB (Kibibyte), MiB (Mebibyte), GiB (Gibibyte), TiB (Tebibyte). Calculation runs on smart-tools.xyz.
- time_converter: Convert a value between time units. Units: µs (Microsecond), ms (Millisecond), s (Second), min (Minute), h (Hour), d (Day), wk (Week), mo (Month), yr (Year). Calculation runs on smart-tools.xyz.
- loan_calculator: Monthly payment, total repayment and interest for an amortising loan (annuity formula). Runs on smart-tools.xyz.
- mortgage_calculator: Monthly mortgage payment including optional down payment, property tax and insurance (PITI). Runs on smart-tools.xyz.
- compound_interest_calculator: Future balance and interest earned: A = P(1 + r/n)^(nt). Runs on smart-tools.xyz.
- vat_calculator: Add VAT to a net amount or remove it from a gross amount. Runs on smart-tools.xyz.
- tip_calculator: Tip amount, total and per-person split for a bill. Runs on smart-tools.xyz.
- discount_calculator: Final price after one or two successive discounts, plus amount saved. Runs on smart-tools.xyz.
- percentage_calculator: Percentage operations. operation=percent_of: a% of b. operation=is_what_percent: a is what % of b. operation=change: percent change from a to b. Runs on smart-tools.xyz.
- salary_calculator: Convert pay between hourly, daily, weekly, biweekly, monthly and annual. Runs on smart-tools.xyz.
- margin_calculator: Profit, margin (share of price) and markup (share of cost) from cost and selling price. Runs on smart-tools.xyz.
- unit_price_calculator: Compare price per unit of two packs and report which is cheaper. Runs on smart-tools.xyz.
- fuel_cost_calculator: Fuel needed and trip cost. system=metric: distance km, consumption L/100km. system=imperial: distance miles, consumption mpg. Runs on smart-tools.xyz.
- electricity_cost_calculator: Running cost of an appliance per day, month and year from its wattage. Runs on smart-tools.xyz.
- bmi_calculator: Body Mass Index and category. system=metric: weight_kg, height_cm. system=imperial: weight_lb, height_ft (+height_in). Runs on smart-tools.xyz.
- bmr_calculator: Basal metabolic rate (Mifflin–St Jeor) and daily calories (TDEE = BMR × activity). Runs on smart-tools.xyz.
- body_fat_calculator: Body fat percentage by the US Navy (Hodgdon–Beckett) method, metric measurements in cm. Females require hip_cm. Runs on smart-tools.xyz.
- ideal_weight_calculator: Healthy weight range (BMI 18.5–24.9) plus Devine, Robinson, Miller and Hamwi formula estimates, from height in cm. Runs on smart-tools.xyz.
- due_date_calculator: Estimated due date by Naegele's rule (+280 days from last period, adjusted for cycle length). Runs on smart-tools.xyz.
- age_calculator: Exact age in years, months and days between a birth date and a reference date (default: today). Runs on smart-tools.xyz.
- date_difference_calculator: Difference between two dates: calendar years/months/days, total days, weeks and weekday count. Runs on smart-tools.xyz.
- hours_calculator: Time worked between two clock times (handles overnight), minus a break, with optional pay. Times as HH:MM. Runs on smart-tools.xyz.
- aspect_ratio_calculator: Simplify a width×height ratio and scale to a new width or height. Runs on smart-tools.xyz.
- standard_deviation_calculator: Mean, variance and standard deviation (both sample and population) of a list of numbers. Runs on smart-tools.xyz.
- fraction_calculator: Exact arithmetic on two fractions (a/b op c/d), reduced to lowest terms. op is one of + - * /. Runs on smart-tools.xyz.
- triangle_calculator: Solve a triangle. mode=sss: three sides a,b,c. mode=sas: two sides a,b and the included angle angle_c (degrees). Returns sides, angles (degrees), area and perimeter. Runs on smart-tools.xyz.
- pace_calculator: Running pace per km and per mile, plus speed, from distance and time. Runs on smart-tools.xyz.
- subnet_calculator: IPv4 subnet details: network, broadcast, mask, wildcard, host range and count for an IP and prefix. Runs on smart-tools.xyz.
- color_converter: Convert a color between HEX, RGB and HSL. Accepts #hex, rgb()/rgba(), hsl()/hsla(). Runs on smart-tools.xyz.
- gpa_calculator: Weighted grade point average from letter grades (US 4.0 scale, +/-) or numeric grade points and credit hours. Runs on smart-tools.xyz.
- scientific_calculator: Evaluate a math expression with correct order of operations: + - * / % ^, parentheses, and functions (sqrt, sin, cos, tan, ln, log, exp, min, max, factorial via !). Constants pi, e. Angles in radians. Runs on smart-tools.xyz.

Screening checks:
- MCP handshake: pass (Answered in 75ms)
- Domain against threat feeds (Cloudflare security DNS): pass (smart-tools.xyz not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (74 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)