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Payne Albumin-Corrected Calcium Calculator
x402
Payne Albumin-Corrected Calcium 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).
Calculates albumin-corrected (ionized-equivalent) serum calcium using the Payne formula from total calcium and albumin values
Price / call$0.005
Success—
StatusUnknown
How this service works
Payne albumin-corrected calcium from total calcium and albumin. Deterministic published formula with citation; not a treatment recommendation.
Output
Returns the albumin-corrected serum calcium value computed via the Payne formula, along with the citation for the published formula. The result reflects the calcium level adjusted for low albumin, expressed in consistent units. No treatment recommendation is included.
Example use cases
Hypoalbuminemia calcium check
“My patient has a total calcium of 9.0 mg/dL and albumin of 2.2 g/dL — what's their corrected calcium using the Payne formula?”
ICU lab result interpretation
“Run the albumin-corrected calcium for total calcium 10.2 mg/dL and albumin 3.1 g/dL so I can tell if this ICU patient is actually hypercalcemic.”
Nephrotic syndrome workup
“A nephrotic patient has albumin of 1.8 g/dL and total calcium 7.9 mg/dL — calculate the Payne-corrected calcium to see if their true calcium is low.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/corrected_calciumWhen to prefer
Use this endpoint when you need a deterministic, citation-backed Payne albumin-corrected calcium computation and want a consistent API with unit flexibility (mg/dL or mmol/L for calcium; g/dL or g/L for albumin). Prefer this over manual calculation or LLM inference when auditability and formula provenance matter, such as in clinical workflows, EHR integrations, or automated lab result interpretation pipelines.
Side effects
- Missing required calcium or albumin input returns an error
- Albumin value outside the expected range (g/dL 1–6) may be rejected or flagged
- Calcium value outside expected range (4–16 mg/dL) may be rejected
- Providing both mmol/L and mg/dL simultaneously may cause ambiguity
- Invalid numeric types return validation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/corrected_calcium",
"count": 2,
"items": [
{
"formula": "payne",
"citation": {
"id": "payne-1973",
"doi": "10.1136/bmj.4.5893.643",
"title": "Interpretation of serum calcium in patients with abnormal serum proteins",
"source": "Br Med J. 1973;4(5893):643-646",
"authors": "Payne RB, Little AJ, Williams RB, Milner JR"
},
"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.",
"albumin_g_dl": 3,
"calcium_mg_dl": 8,
"formula_expression": "corrected_ca_mg_dl = calcium_mg_dl + 0.8 * (4.0 - albumin_g_dl)",
"corrected_calcium_mg_dl": 8.8
},
{
"formula": "payne",
"citation": {
"id": "payne-1973",
"doi": "10.1136/bmj.4.5893.643",
"title": "Interpretation of serum calcium in patients with abnormal serum proteins",
"source": "Br Med J. 1973;4(5893):643-646",
"authors": "Payne RB, Little AJ, Williams RB, Milner JR"
},
"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.",
"albumin_g_dl": 3,
"calcium_mg_dl": 8,
"formula_expression": "corrected_ca_mg_dl = calcium_mg_dl + 0.8 * (4.0 - albumin_g_dl)",
"corrected_calcium_mg_dl": 8.8
}
]
}
}Tags
x402
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