Finance & Bills
Calcgrid
by tttkmbb · tttkmbb.com
Financial, health, time-zone and unit calculators with China working-day data
Calcgrid offers 533 deterministic calculators for loans, mortgages, compound interest, BMI, running pace, temperature conversion, lunar calendar dates, and China national working days (2024-2026). Muse can search, run calculations and return typed results with formulas and sources.
Try asking Muse: "How much will my monthly mortgage payment be on a $300,000 home with 20% down at 6.5% over 30 years?"
Working now?
Working
Worked last 7 days
100% of checks
How to get it
Extra setup
Account
No account needed
Price
Not stated
Source: Found in the official MCP Registry (com.tttkmbb/calcgrid) · First listed September 25, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 34 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://tttkmbb.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 608ms. Worked in 100% of checks over 30 days.
Screening · September 25, 2026
Screened, no issues found
MCP handshake
Pass
Answered in 215ms
Domain against threat feeds (Cloudflare security DNS)
Pass
tttkmbb.com 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
48 tools read, nothing found
Inputs asking for passwords, card numbers or seed phrases
Pass
None found
Domain and redirects
Pass
Domain registered 181 days ago
AI review of purpose and tool behavior
Pass
No concerns
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 · 40
search_calculatorsUse this when a user needs a deterministic calculation but none of the dedicated tools clearly matches and the calculator_id is unknown. Search 539 calculators from the complete task in English or Chinese, then call run_calculator with the top matching calculator_id and returned list_calculatorsList all calculators, optionally filtered by category id (finance, health, fitness, math, geometry, statistics, conversion, physics, chemistry, everyday, food, construction, business, time, medical, engineering, weather, investing, developer, energy, photography, science, gaming,list_calculator_categoriesList the calculator categories with id, name, description and calculator count. Use it to orient before list_calculators. Does not perform calculations.get_calculator_schemaUse this only after search_calculators when its input_hints do not resolve a range, enum or optional-field question. Return the full input/output schema, formula, sources, examples and limitations for one calculator. Do not call it when the search result already supplies enough irun_calculatorUse this when the user needs one of Calcgrid's 539 deterministic calculators and no dedicated typed tool covers it. Call it immediately after search_calculators once calculator_id and input_hints are known; do not stop at search or schema discovery. Do not use it for trivial aritconvert_unitsUse this when the user asks to convert a numeric value between units of the same physical quantity: length, mass, temperature, area, volume, speed, time, data, energy, pressure, power, angle, fuel economy, force, frequency, density or torque. Unit symbols and common names are acclist_unitsList every unit symbol supported by convert_units, grouped by quantity, with names. Use it when a unit symbol is rejected with UNKNOWN_UNIT. Does not convert anything.calculate_business_deadlineUse this when you need an SLA, support, procurement or order deadline measured in business hours under the published mainland China or UK calendar, and must express the result in another team's IANA time zone with reproducible holiday and DST evidence. Call this tool directly andcheck_china_working_dayUse this when you need to know whether a specific 2024-2026 date is a working day in mainland China, especially around Spring Festival, National Day or another adjusted holiday. Call this tool directly and return its calculation instead of answering the formula from memory or stoadd_china_working_daysUse this when you need a deadline or settlement date a stated number of mainland China national working days before or after a 2024-2026 date. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use thiscount_china_working_daysUse this when you need the number of official mainland China working days in a 2024-2026 date range for an SLA, payroll, project or delivery estimate. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not check_uk_working_dayUse this when you need to know whether a 2024-2028 UK date is a Monday-Friday working day after applying the official bank holidays for the selected division. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery.add_uk_working_daysUse this when you need a deadline a stated number of UK working days before or after a 2024-2028 date and the correct division's bank holidays matter. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not count_uk_working_daysUse this when you need a 2024-2028 UK SLA, payroll, project or delivery-day count and the selected division's bank holidays must be excluded. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this convert_solar_to_lunarUse this when you need the Chinese lunar date, ganzhi day/month/year, zodiac year or current solar term for a given Gregorian date (defaults to today). Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do notconvert_lunar_to_solarUse this when you know a lunar date such as 八月十五 or 闰六月初一 of a given lunar year and need the Gregorian date (e.g. for a lunar birthday or festival). Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not uslist_solar_termsUse this when you need the date or time of 立春, 清明, 夏至, 冬至 or any other solar term in a given year, or the full 24-term table. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you only neresolve_local_timeUse this when you must safely turn a named-zone local time into an instant, validate a scheduled time around a daylight-saving transition, or preserve every possible interpretation instead of silently choosing one. Call this tool directly and return its calculation instead of anslist_time_zone_transitionsUse this when you need the next or historical daylight-saving/offset changes for scheduling, payroll, travel, audits or a regression test, with a specific reproducible tzdb version. Call this tool directly and return its calculation instead of answering the formula from memory orconvert_time_zoneUse this when you need to know what time an event scheduled in one city corresponds to in another city or in UTC on a specific date. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you calculate_loan_paymentUse this when you need the monthly payment or total interest cost of an auto, personal, student or other fixed-rate installment loan given its amount, APR and term. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at disccompare_loansUse this when you have two loan or mortgage quotes with different rates, terms or fees for the same amount and want the payments and lifetime costs side by side. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovecalculate_compound_interestUse this when you need to project a savings account, certificate of deposit or investment balance from a starting amount, an annual rate, a term and optional monthly deposits. Call this tool directly and return its calculation instead of answering the formula from memory or stoppcalculate_mortgage_paymentUse this when you want the monthly cost of buying a home with a fixed-rate mortgage, including escrowed taxes and insurance, or the total interest over the loan. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovecalculate_tipUse this when you need to add a gratuity to a restaurant, delivery or service bill and optionally divide the total among several people. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when calculate_amortization_scheduleUse this when you need to see how each payment splits into principal and interest over the life of a mortgage or loan, the balance at the end of each year, or the effect of paying extra every month. Call this tool directly and return its calculation instead of answering the formucalculate_bmiUse this when you need an adult's BMI, its WHO/CDC weight category, or the weight range that corresponds to a normal BMI (18.5–24.9) for a given height. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do nocalculate_bmrUse this when you need resting daily calorie needs for an adult from sex, weight, height and age, as a base for diet or TDEE calculations. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this whecalculate_tdeeUse this when you need daily maintenance calories for an adult, or calorie targets for a mild/standard deficit or surplus. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when the person is calculate_running_paceUse this when you know a distance and the time it took (or a target time) and need the pace, the equivalent speed, or the time that pace gives over standard race distances. Call this tool directly and return its calculation instead of answering the formula from memory or stoppingcalculate_percentageUse this when you need a percentage of a value, the percentage one value represents of another, or the base value that a part and its percentage imply. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do notcalculate_percentage_changeUse this when you have a starting and an ending value and need the percentage increase or decrease, or a symmetric percent difference between two comparable values. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discsolve_quadratic_equationUse this when you need the solutions of a second-degree polynomial equation, or the vertex and discriminant of a parabola y = ax² + bx + c. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this whcalculate_fraction_arithmeticUse this when you need an exact result of an operation on two fractions (e.g. 3/4 + 1/6), including mixed numbers such as 1 1/2, rather than a rounded decimal. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discoverycalculate_circle_propertiesUse this when you know a circle's radius or diameter and need its area, circumference or the other dimension. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when the shape is an ellipse (uscalculate_descriptive_statisticsUse this when you have a set of numeric observations and need its central tendency, spread or quartiles, e.g. the standard deviation of a data set. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not usecalculate_t_testUse this when you want to test whether a sample mean differs from a hypothesised value, whether two independent groups have different means, or whether paired before/after measurements changed. Call this tool directly and return its calculation instead of answering the formula frconvert_temperatureUse this when you need a weather, cooking, body or laboratory temperature in another scale, e.g. Fahrenheit to Celsius or Celsius to Kelvin. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this wcalculate_kinetic_energyUse this when you need the energy of motion of an object of known mass and speed (vehicle, projectile, ball), for example to compare impact or braking energies. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discoversolve_ohms_lawUse this when you know two of voltage, current and resistance in a DC or purely resistive circuit and need the third and the power. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when the lRecent checks
2026-09-28 09:01:34live · HTTP 200608ms
2026-09-28 06:45:55live · HTTP 200932ms
2026-09-28 04:30:48live · HTTP 200264ms
2026-09-28 02:01:03live · HTTP 200246ms
2026-09-27 23:45:52live · HTTP 200297ms
2026-09-27 21:16:15live · HTTP 2001459ms
2026-09-27 19:01:04live · HTTP 200412ms
2026-09-27 16:45:58live · HTTP 2001895ms
2026-09-27 14:45:59live · HTTP 200547ms
2026-09-27 12:16:41live · HTTP 2001484ms
2026-09-27 10:01:54live · HTTP 200404ms
2026-09-27 07:45:55live · HTTP 2001551ms
Link
https://tttkmbb.com/mcpQuestions about Calcgrid in Muse
How do I connect Calcgrid to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Calcgrid to help me. It is a free service with an MCP server at https://tttkmbb.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 Calcgrid working right now?
At the last check (September 28, 2026, 09:01 UTC) the endpoint was working, answering in 608ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Calcgrid safe to connect to Muse?
It was screened on September 25, 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 Calcgrid do in Muse?
It exposes 40 tools, including search_calculators, list_calculators, list_calculator_categories, get_calculator_schema. For example, you could ask Muse: "How much will my monthly mortgage payment be on a $300,000 home with 20% down at 6.5% over 30 years?"
Follow Calcgrid
Made this app? Claim it or get a status badge
Is this yours?
This listing was added from public sources (Found in the official MCP Registry (com.tttkmbb/calcgrid)). If you build Calcgrid, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/calcgrid"><img src="https://musedirectory.ai/badge/calcgrid.svg" alt="Calcgrid on musedirectory.ai" width="236" height="40"></a>