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ISS Calculator (Baker 1974)
x402
ISS Calculator (Baker 1974) 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).
Computes the Injury Severity Score (ISS) from caller-provided AIS grades for the six standard body regions using the Baker 1974 published formula.
Price / call$0.005
Success—
StatusUnknown
How this service works
Injury Severity Score (Baker 1974): ISS is the sum of squares of the three highest caller-assigned AIS body-region grades (head, face, chest, abdomen, extremity, external; each 0-6). Any AIS 6 (unsurvivable) is ISS 75. Deterministic published arithmetic with citation; not a triage order and not NISS (which squares the three worst injuries regardless of region).
Output
Returns the computed ISS integer (0–75). If any AIS region grade is 6 (unsurvivable), ISS is returned as 75 per the Baker 1974 convention. Otherwise ISS is the sum of the squares of the three highest AIS grades across the six body regions, following the published deterministic formula.
Example use cases
Trauma bay ISS scoring
“My trauma patient has AIS scores: head 5, face 0, chest 4, abdomen 3, extremity 2, external 0. What is their ISS?”
Unsurvivable injury flag
“A patient came in with AIS grade 6 for the chest. Can you confirm what the ISS would be and whether that triggers the unsurvivable ISS 75 result?”
Research dataset ISS computation
“I have a set of AIS regional grades from a study: head 2, face 1, chest 3, abdomen 4, extremity 1, external 0. Compute the Injury Severity Score so I can include it in the dataset.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/issWhen to prefer
Use this endpoint when you need a fast, deterministic, citation-backed ISS computation from pre-assigned AIS grades and do not want NISS (New Injury Severity Score). It is not a triage decision tool and does not assign AIS grades itself — the caller must supply the six regional AIS values. Prefer this over manual calculation to avoid arithmetic errors and to get automatic handling of the AIS-6 edge case (ISS 75).
Side effects
- Missing required AIS parameter — returns error indicating which region grade was omitted
- AIS grade outside 0–6 integer range — validation error
- Non-integer AIS value — type error
- All AIS grades are 0 — returns ISS 0 (valid but may indicate data entry error)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/iss",
"count": 2,
"items": [
{
"score": 14,
"formula": "iss",
"ais_face": 0,
"ais_head": 3,
"citation": {
"id": "baker-1974",
"doi": "10.1097/00005373-197403000-00001",
"title": "The injury severity score: a method for describing patients with multiple injuries and evaluating emergency care",
"source": "J Trauma. 1974;14(3):187-196",
"authors": "Baker SP, O'Neill B, Haddon W Jr, Long WB"
},
"used_ais": [
3,
2,
1
],
"ais_chest": 2,
"max_score": 75,
"components": [
{
"ais": 3,
"factor": "ais_head",
"points": 9,
"present": true
},
{
"ais": 0,
"factor": "ais_face",
"points": 0,
"present": false
},
{
"ais": 2,
"factor": "ais_chest",
"points": 4,
"present": true
},
{
"ais": 1,
"factor": "ais_abdomen",
"points": 1,
"present": true
},
{
"ais": 0,
"factor": "ais_extremity",
"points": 0,
"present": false
},
{
"ais": 0,
"factor": "ais_external",
"points": 0,
"present": false
}
],
"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.",
"ais_abdomen": 1,
"ais_external": 0,
"ais_extremity": 0,
"formula_expression": "ISS = a^2 + b^2 + c^2 for the three highest AIS body-region grades (0-5); any AIS 6 => 75"
},
{
"score": 14,
"formula": "iss",
"ais_face": 0,
"ais_head": 3,
"citation": {
"id": "baker-1974",
"doi": "10.1097/00005373-197403000-00001",
"title": "The injury severity score: a method for describing patients with multiple injuries and evaluating emergency care",
"source": "J Trauma. 1974;14(3):187-196",
"authors": "Baker SP, O'Neill B, Haddon W Jr, Long WB"
},
"used_ais": [
3,
2,
1
],
"ais_chest": 2,
"max_score": 75,
"components": [
{
"ais": 3,
"factor": "ais_head",
"points": 9,
"present": true
},
{
"ais": 0,
"factor": "ais_face",
"points": 0,
"present": false
},
{
"ais": 2,
"factor": "ais_chest",
"points": 4,
"present": true
},
{
"ais": 1,
"factor": "ais_abdomen",
"points": 1,
"present": true
},
{
"ais": 0,
"factor": "ais_extremity",
"points": 0,
"present": false
},
{
"ais": 0,
"factor": "ais_external",
"points": 0,
"present": false
}
],
"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.",
"ais_abdomen": 1,
"ais_external": 0,
"ais_extremity": 0,
"formula_expression": "ISS = a^2 + b^2 + c^2 for the three highest AIS body-region grades (0-5); any AIS 6 => 75"
}
]
}
}Tags
x402
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