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HEAR Score Calculator (No Troponin)
x402
HEAR Score Calculator (No Troponin) 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).
Computes the HEAR score (0–8) for emergency chest pain risk stratification using age, caller-assigned history, ECG, and risk factors — without troponin.
Price / call$0.005
Success—
StatusUnknown
How this service works
HEAR score for emergency chest pain from age and caller-assigned history, ECG, and risk factors (each 0-2, max 8). No troponin. Smith 2020 very-low-risk group is scores 0 and 1 (MACE ~0.9% in that paper). Deterministic published score with citation; not a diagnosis or discharge protocol. magent does not interpret history, count risk factors, or read an ECG.
Output
Returns the numeric HEAR score (integer 0–8) computed from the four caller-supplied components (age bracket, history, ECG, risk factors), plus an indication of whether the score falls in the Smith 2020 very-low-risk group (scores 0–1, associated with ~0.9% MACE). The score is deterministic and cites published methodology; it is not a diagnosis or discharge recommendation.
Example use cases
ED triage for low-risk chest pain
“I have a 42-year-old patient in the ED with nonspecific chest pain history (score 0), a normal ECG (score 0), and no cardiac risk factors (score 0) — can you compute the HEAR score and tell me if they fall into Smith 2020's very-low-risk group?”
Moderate-risk chest pain stratification
“Compute the HEAR score for a 55-year-old with moderately suspicious history (score 1), ECG showing repolarization changes but no significant ST depression (score 1), and one known risk factor (score 1).”
High-risk older patient scoring
“What's the HEAR score for a 72-year-old with highly suspicious chest pain history (score 2), significant ST elevation on ECG (score 2), and known atherosclerotic disease (score 2)?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/hearWhen to prefer
Use this endpoint when you need a fast, deterministic HEAR score for emergency chest pain triage and troponin results are not yet available or not included in the workflow. Prefer it over full HEART score calculators when troponin is intentionally omitted. Ideal for ED clinical decision support pipelines that require a citable, published rule (Smith 2020 / Six 2008 HEART age cutoffs) rather than a probabilistic model.
Side effects
- Missing required query parameters (age, history, ecg, risk_factors) returns an error
- Age out of range (below 18 or above 120) may return a validation error
- Integer inputs outside 0–2 for history, ecg, or risk_factors return a validation error
- Payment not included or insufficient USDC results in 402 Payment Required
- Caller-assigned scores that do not accurately reflect clinical findings will produce a valid but clinically misleading score — the API cannot verify inputs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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