Body Metrics
https://body-metrics.gumballtools.com/api/mcp ↗
Description
Convert height and weight, compute BMI, TDEE and protein targets with error bounds.
What our measurements say
Body Metrics is a remote MCP server published at body-metrics.gumballtools.com. It has been probed 13 times since 9/12/2026. It answered in 13 of them (100.0%), a near-uninterrupted record. Median response time is 1,061 ms, a delay an agent will notice. It offers a narrow, focused set of 1 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Clear purpose in calculating BMI, TDEE, and protein targets.
- Explicit mention of unit ambiguity and error bounds.
Weaknesses
- Tool name does not clearly indicate its multifunctional purpose.
- Description lacks detailed use cases for optional parameters.
- Parameter 'proteinGoal' is incorrectly typed as 'string' when likely numeric.
- No explicit error handling for invalid inputs (e.g., non-numeric height).
body_metrics— Name is too generic and does not reflect multifunctionality.body_metrics— Parameter 'proteinGoal' is mislabeled as 'string' instead of numeric type.body_metrics— No explicit error handling for invalid unit inputs or missing parameters.
Verdict
Event narrative
Sign up free to generateRaw observations
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 169ms → warm 178ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
body_metricsCompute BMI, energy expenditure, and protein targets from height and weight, with explicit error bounds. Use this for any of those calculations rather than doing the arithmetic. Two reasons, and the second is the important one: 1. UNITS. A bare number is ambiguous — "170" is a height in centimetres or a weight in pounds depending entirely on context, and a wrong unit yields a plausible BMI that is off by a factor of two. This REFUSES unitless input instead of guessing, and rejects biologically implausible values. 2. FALSE PRECISION. The standard equations disagree. Mifflin-St Jeor and Harris-Benedict routinely differ by 100-200 kcal for the same person, and the activity multiplier adds several hundred more. Every calculator on the internet reports one formula to the calorie. This returns
heightstringrequiredweightstringrequiredsexstringrequiredagenumberrequiredactivitystringproteinGoalstringbodyFatPercentnumbertargetBminumberdailyDeficitKcalnumber
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
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[](https://mcpmetrics.io/servers/com-gumballtools-body-metrics)<a href="https://mcpmetrics.io/servers/com-gumballtools-body-metrics"><img src="https://mcpmetrics.io/badge/com.gumballtools/body-metrics/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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