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magent BMI Calculator
x402
magent BMI Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes Body Mass Index (BMI) from height and weight using the Keys/Quetelet formula, returning the deterministic index value with citation.
Price / call$0.005
Success—
StatusUnknown
How this service works
Body-mass index from height and weight (Keys/Quetelet). Use for GLP-1 and bariatric prior-auth arithmetic. Deterministic published index with citation; not a diagnosis.
Output
Returns a numeric BMI value computed as weight_kg divided by height_m squared (Keys/Quetelet), accompanied by a citation to the published formula. Not a clinical diagnosis — a deterministic arithmetic result suitable for documentation in prior authorization workflows.
Example use cases
GLP-1 prior authorization arithmetic
“I'm filling out a prior auth for semaglutide and need the patient's BMI — they're 5 feet 8 inches tall and weigh 245 pounds. Can you calculate that and give me the cited index value?”
Bariatric surgery eligibility check
“Does this patient qualify for bariatric surgery based on BMI? They're 162 cm and 110 kg — please compute their BMI using the standard Keys/Quetelet formula.”
Population health screening workflow
“I have a patient who is 68 inches tall and weighs 190 pounds. What's their BMI? I need the deterministic calculated value for their chart.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/bmiWhen to prefer
Choose this endpoint when you need a deterministic, citable BMI value for clinical documentation, insurance prior authorization (especially GLP-1 or bariatric), or structured medical workflows where reproducibility and citation are required. Prefer it over general-purpose calculators when the citation lineage (Keys/Quetelet) matters for audit trails or payer forms.
Side effects
- Missing both height parameters (height_cm and height_in not provided) — returns error
- Missing both weight parameters (weight_kg and weight_lb not provided) — returns error
- Implausible or zero/negative input values may produce nonsensical BMI output
- Payment failure via x402 protocol results in 402 response with no calculation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/bmi",
"count": 2,
"items": [
{
"bmi": 24.2,
"formula": "bmi",
"citation": {
"id": "keys-1972",
"doi": "10.1016/0021-9681(72)90027-6",
"title": "Indices of relative weight and obesity",
"source": "J Chronic Dis. 1972;25(6):329-343",
"authors": "Keys A, Fidanza F, Karvonen MJ, Kimura N, Taylor HL"
},
"height_cm": 170,
"weight_kg": 70,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "BMI = weight_kg / (height_m ^ 2)",
"who_adult_category": "normal"
},
{
"bmi": 24.2,
"formula": "bmi",
"citation": {
"id": "keys-1972",
"doi": "10.1016/0021-9681(72)90027-6",
"title": "Indices of relative weight and obesity",
"source": "J Chronic Dis. 1972;25(6):329-343",
"authors": "Keys A, Fidanza F, Karvonen MJ, Kimura N, Taylor HL"
},
"height_cm": 170,
"weight_kg": 70,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "BMI = weight_kg / (height_m ^ 2)",
"who_adult_category": "normal"
}
]
}
}Tags
x402
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