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CHA2DS2-VASc Score Calculator
x402
CHA2DS2-VASc Score Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).
Computes the CHA2DS2-VASc stroke-risk score for atrial fibrillation patients from discrete clinical flags (age, sex, CHF, hypertension, diabetes, prior stroke/TIA, vascular disease).
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Output
Returns the integer CHA2DS2-VASc total score (0–9) computed from the submitted clinical flags, with individual component contributions and a citation to the published scoring method for stroke-risk stratification in atrial fibrillation.
Example use cases
Anticoagulation decision for new AFib diagnosis
“My patient is a 68-year-old male just diagnosed with atrial fibrillation — he has hypertension and had a prior MI, but no diabetes, no heart failure, and no history of stroke or TIA. What's his CHA2DS2-VASc score?”
High-risk elderly female stroke screening
“Can you run the CHA2DS2-VASc score for a 76-year-old female with congestive heart failure, diabetes, and a previous TIA? She also has peripheral artery disease but no hypertension.”
Low-risk male AFib triage
“I have a 58-year-old male AFib patient with no hypertension, no diabetes, no heart failure, no stroke history, and no vascular disease — calculate his CHA2DS2-VASc score so I can see if he needs anticoagulation.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/cha2ds2_vasc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, citation-backed CHA2DS2-VASc score computed from discrete structured clinical inputs within an automated clinical or administrative workflow. Prefer it over general LLM reasoning for auditable, reproducible stroke-risk arithmetic that must match the published Lip 2010 / ESC guideline formula exactly.
Side effects
- Missing required query parameters (age, sex, chf, hypertension, diabetes, stroke_tia, vascular_disease) returns a 400 error
- Age outside valid range (18–120) may return a validation error
- Invalid enum for sex (not 'male' or 'female') returns a schema error
- Network timeout or upstream unavailability returns a 5xx error
- Payment not provided or insufficient USDC triggers x402 payment-required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/cha2ds2_vasc",
"count": 2,
"items": [
{
"sex": "female",
"score": 5,
"formula": "cha2ds2_vasc",
"citation": {
"id": "lip-2010",
"doi": "10.1378/chest.09-1584",
"title": "Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation",
"source": "Chest. 2010;137(2):263-272",
"authors": "Lip GYH, Nieuwlaat R, Pisters R, Lane DA, Crijns HJ"
},
"age_years": 78,
"max_score": 9,
"components": [
{
"factor": "congestive_heart_failure",
"points": 0,
"present": false
},
{
"factor": "hypertension",
"points": 1,
"present": true
},
{
"value": 78,
"factor": "age",
"points": 2,
"present": true
},
{
"factor": "diabetes",
"points": 1,
"present": true
},
{
"factor": "stroke_tia_thromboembolism",
"points": 0,
"present": false
},
{
"factor": "vascular_disease",
"points": 0,
"present": false
},
{
"factor": "sex_female",
"points": 1,
"present": true
}
],
"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": "CHA2DS2-VASc = CHF 1 + HTN 1 + Age≥75 2 (or 65-74 1) + diabetes 1 + stroke/TIA 2 + vascular 1 + female 1; max 9"
},
{
"sex": "female",
"score": 5,
"formula": "cha2ds2_vasc",
"citation": {
"id": "lip-2010",
"doi": "10.1378/chest.09-1584",
"title": "Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation",
"source": "Chest. 2010;137(2):263-272",
"authors": "Lip GYH, Nieuwlaat R, Pisters R, Lane DA, Crijns HJ"
},
"age_years": 78,
"max_score": 9,
"components": [
{
"factor": "congestive_heart_failure",
"points": 0,
"present": false
},
{
"factor": "hypertension",
"points": 1,
"present": true
},
{
"value": 78,
"factor": "age",
"points": 2,
"present": true
},
{
"factor": "diabetes",
"points": 1,
"present": true
},
{
"factor": "stroke_tia_thromboembolism",
"points": 0,
"present": false
},
{
"factor": "vascular_disease",
"points": 0,
"present": false
},
{
"factor": "sex_female",
"points": 1,
"present": true
}
],
"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": "CHA2DS2-VASc = CHF 1 + HTN 1 + Age≥75 2 (or 65-74 1) + diabetes 1 + stroke/TIA 2 + vascular 1 + female 1; max 9"
}
]
}
}Tags
x402
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