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magent HAT Score Calculator (sICH after Stroke Thrombolysis)
x402
magent HAT Score Calculator (sICH after Stroke Thrombolysis) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Computes the HAT (Hemorrhage After Thrombolysis) score to estimate risk of symptomatic intracranial hemorrhage (sICH) following tPA stroke treatment
Price / call$0.005
Success—
StatusUnknown
How this service works
HAT (Lou 2008 Neurology) for sICH after stroke thrombolysis. Diabetes or glucose >200 mg/dL (1; not additive). NIHSS <15 0, 15-20 1, >20 2. CT hypodensity none 0, <1/3 MCA 1, >1/3 MCA 2 (no equals-1/3). Max 5. Collective sICH 2/5/10/15/44% for scores 0/1/2/3/>3. Glucose in mg/dL (mmol × 18). Not a tPA withhold. magent does not assign NIHSS or read CT.
Output
Returns a HAT total score (0–5) and associated collective sICH probability: 2% for score 0, 5% for score 1, 10% for score 2, 15% for score 3, and 44% for scores above 3. The response reflects the Lou 2008 validated scoring categories. This is not a tPA withholding recommendation and does not include NIHSS computation or CT interpretation.
Example use cases
Post-tPA sICH risk stratification in ED
“My stroke patient just received tPA — NIHSS was 23, no diabetes, glucose 215 mg/dL, and CT shows hypodensity greater than a third of the MCA. What's the HAT score and what's the sICH risk?”
Borderline glucose without diabetes history
“I have a stroke patient going for thrombolysis — no known diabetes, baseline glucose is 210 mg/dL, NIHSS 14, and CT shows no visible hypodensity. Can you compute the HAT score for me?”
Low-risk pre-tPA documentation
“Stroke patient with NIHSS 8, no diabetes, glucose 155 mg/dL, and no CT hypodensity — calculate the HAT score so I can document the sICH risk before giving tPA.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/hatWhen to prefer
Use this endpoint when you need a fast, validated HAT score computation following the Lou 2008 Neurology methodology for sICH risk after stroke thrombolysis. Prefer it over manual calculation when integrating clinical decision support into stroke workflows, EHR pipelines, or agent-based triage systems. This is specifically the HAT score — not the SEDAN, SITS-SICH, or other post-thrombolysis hemorrhage risk tools.
Side effects
- Missing required parameters (diabetes, nihss, hypodensity) returns a validation error
- Both glucose_mg_dl and glucose_mmol_l provided simultaneously causes a rejection
- NIHSS value outside 0–42 integer range may be rejected or produce unexpected output
- Glucose at exactly 200 mg/dL does not score the glucose item — borderline edge case
- Hypodensity value not matching enum (none, less_than_third, greater_than_third) returns error
- Payment failure (x402) if USDC balance insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
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