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A1C to eAG Bidirectional Converter
x402
A1C to eAG Bidirectional Converter is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Converts HbA1c percentage to estimated average glucose (eAG) or eAG back to HbA1c using the Nathan/ADAG published deterministic equation.
Price / call$0.005
Success—
StatusUnknown
How this service works
Nathan/ADAG A1C to estimated average glucose conversion, or the reverse. Provide exactly one of a1c_percent or eAG. Deterministic published equation with citation.
Output
Returns the converted value — either the estimated average glucose (in mg/dL and possibly mmol/L) corresponding to the provided A1C percentage, or the A1C percentage corresponding to the provided eAG — computed via the deterministic Nathan/ADAG published equation with citation metadata.
Example use cases
Patient A1C lab result interpretation
“My patient's HbA1c just came back at 8.5% — what does that translate to in estimated average glucose in mg/dL so I can explain it to them in plain terms?”
Reverse eAG to A1C lookup
“My continuous glucose monitor shows an average glucose of 183 mg/dL over the past 3 months — what would that correspond to as an A1C percentage?”
Metric unit eAG conversion
“Convert an eAG of 9.5 mmol/L to its equivalent A1C percentage using the Nathan/ADAG equation.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/a1c_eagWhen to prefer
Use this endpoint when you need a standards-compliant, citation-backed bidirectional conversion between HbA1c and estimated average glucose for clinical or patient-facing applications. Prefer it over manual formula application to ensure use of the correct Nathan/ADAG coefficients. Ideal for embedding in diabetes management tools, EHR integrations, or clinical decision support agents.
Side effects
- Both a1c_percent and an eAG parameter provided simultaneously — endpoint requires exactly one
- A1C value outside valid range (4–15%) returns an error
- eAG in mg/dL outside valid range (50–500) returns an error
- Missing required input (neither a1c_percent nor eAG provided) returns validation error
- Non-numeric input for numeric fields causes a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/a1c_eag",
"count": 2,
"items": [
{
"formula": "nathan_adag",
"citation": {
"id": "nathan-2008",
"doi": "10.2337/dc08-0545",
"title": "Translating the A1C assay into estimated average glucose values",
"source": "Diabetes Care. 2008;31(8):1473-1478",
"authors": "Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ"
},
"direction": "a1c_to_eag",
"eag_mg_dl": 154.2,
"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.",
"eag_mmol_l": 8.6,
"a1c_percent": 7,
"formula_expression": "eAG_mg_dl = 28.7 * A1C_percent - 46.7"
},
{
"formula": "nathan_adag",
"citation": {
"id": "nathan-2008",
"doi": "10.2337/dc08-0545",
"title": "Translating the A1C assay into estimated average glucose values",
"source": "Diabetes Care. 2008;31(8):1473-1478",
"authors": "Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ"
},
"direction": "a1c_to_eag",
"eag_mg_dl": 154.2,
"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.",
"eag_mmol_l": 8.6,
"a1c_percent": 7,
"formula_expression": "eAG_mg_dl = 28.7 * A1C_percent - 46.7"
}
]
}
}Tags
x402
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