Fitness Tools
Calculate TDEE, body fat, one-rep max, macros, and muscle potential using fitness science formulas.
Deterministic fitness calculators using consensus methods for TDEE, adaptive TDEE from logged data, body fat estimation, one-rep max, macro targets, activity multipliers, powerlifting attempts, muscle potential, FFMI, and muscle mass index. No sign-up required.
Try asking Muse: "Calculate my daily calorie needs based on my age, weight, and activity level."
Source: Found in the official MCP Registry (io.github.almostjacked/fitness-tools) · First listed September 25, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h 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.
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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://fitness-tools-mcp.ajwallacemusic.workers.dev/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: 1310ms. Worked in 100% of checks over 30 days.
Screening · September 25, 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 · 10
tdeeEstimate BMR and TDEE via Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and Cunningham. Provide body_fat or lean_mass to unlock the LBM-based methods.adaptive-tdeeMeasure actual TDEE from a logged history of daily weight and/or calorie intake. Default method (kalman) is a joint Kalman filter over true weight and TDEE — handles missing days, gates outliers, and reports uncertainty (CI95) alongside denoised true weight; regression/endpoints body-fatEstimate body-fat % via US Navy circumference, Jackson-Pollock 3-site skinfold, and Deurenberg (BMI-based) methods.one-rep-maxEstimate 1RM from a submaximal set via Epley, Brzycki, Lombardi, Wathan, O'Conner, and Mayhew; returns a %1RM load chart.macrosCompute protein/fat/carb grams for a calorie target using the g-per-kg-bodyweight method, with goal-based protein defaults.activity-multiplierEstimate the TDEE activity multiplier via the classic lookup table or a NEAT+EAT model (occupation/steps for non-exercise, training volume for exercise).powerlifting-attemptsDeterministic opener/second/third attempts from an estimated 1RM, plus a warmup ramp and per-side plate loading. Tunable by aggressiveness and available plates.muscle-potentialEstimate drug-free maximum bodyweight at a target body-fat % via Casey Butt (wrist+ankle), the FFMI~25 natural cap, and Berkhan's max-contest-weight model. Men only in v1.ffmiCompute the Fat-Free Mass Index (FFMI) and its height-adjusted form from weight and body fat (or lean mass), and flag whether it exceeds the ~25 natural ceiling.rsmiEstimate the appendicular skeletal muscle index (RSMI) from a DXA value (direct) and/or an anthropometric estimate (Wen 2011), and flag low muscle mass against EWGSOP2, AWGS, and Baumgartner sarcopenia cutoffs.Recent checks
Link
https://fitness-tools-mcp.ajwallacemusic.workers.dev/mcpQuestions about Fitness Tools in Muse
How do I connect Fitness Tools to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Fitness Tools to help me. It is a free service with an MCP server at https://fitness-tools-mcp.ajwallacemusic.workers.dev/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 Fitness Tools working right now?
At the last check (September 28, 2026, 07:31 UTC) the endpoint was working, answering in 1310ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Fitness Tools 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 Fitness Tools do in Muse?
It exposes 10 tools, including tdee, adaptive-tdee, body-fat, one-rep-max. For example, you could ask Muse: "Calculate my daily calorie needs based on my age, weight, and activity level."
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<a href="https://musedirectory.ai/connector/fitness-tools"><img src="https://musedirectory.ai/badge/fitness-tools.svg" alt="Fitness Tools on musedirectory.ai" width="236" height="40"></a>