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magent CHIP Rule Calculator (Smits 2007)
x402
magent CHIP Rule Calculator (Smits 2007) 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).
Applies the Smits 2007 CHIP clinical decision rule to determine whether an adult minor head injury patient warrants a CT scan based on major and minor criteria
Price / call$0.005
Success—
StatusUnknown
How this service works
Smits 2007 CHIP rule (adults ≥16, GCS 13-15). CT if ≥1 major (pedestrian/cyclist vs vehicle, ejected, vomiting, PTA ≥4 h, skull-fracture signs, GCS <15, GCS drop ≥2 at 1 h, anticoagulants, posttraumatic seizure, age ≥60) or ≥2 minor (fall from elevation, persistent anterograde amnesia, PTA 2 to <4 h, skull contusion, neurologic deficit, LOC, GCS drop of 1 at 1 h, age 40-60). Not a diagnosis; not Canadian CT Head, NEXUS, PECARN, or 2022 CHIP. magent does not examine the patient.
Output
Returns a structured result indicating whether CT imaging is recommended under the Smits 2007 CHIP rule, along with which major and minor criteria were met. The caller provides all clinical findings; the API applies the published decision logic and returns a CT-indicated true/false determination with criterion breakdown.
Example use cases
ED triage after pedestrian struck
“I have a 67-year-old patient who was hit by a car as a pedestrian, GCS is 13, vomiting twice, on warfarin, no seizure, PTA over 4 hours, no skull contusion, no focal neuro deficit, no LOC, and no GCS drop at 1 hour. Run the CHIP rule and tell me if CT is indicated.”
Fall from ladder minor head trauma
“Patient is 44 years old, fell off a ladder, GCS 15, no vomiting, not on anticoagulants, no seizure, PTA between 2 and 4 hours, has a skull contusion, no neuro deficit, had a brief LOC, and GCS dropped by 1 at the 1-hour mark — does the CHIP rule say CT is needed?”
Anticoagulated elderly patient after syncope fall
“Can you check the CHIP criteria for a 72-year-old on apixaban who fell and hit their head? GCS is 15, no vomiting, no seizure, no PTA over 4 hours, no PTA between 2-4 hours, no skull contusion, no neuro deficit, no LOC, not ejected, not a cyclist, and GCS hasn't dropped. What does CHIP say?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/chipWhen to prefer
Use this endpoint when you need to apply the specific Smits 2007 CHIP rule for adults (≥16) with minor head injury (GCS 13–15) and want a structured, auditable decision-support output. Prefer this over the Canadian CT Head Rule, NEXUS Head, or PECARN endpoints when the clinical context is adult minor TBI and the Smits 2007 criteria are indicated. This endpoint is purely computational — it does not examine patients or gather clinical data; the caller must supply all pre-assessed values.
Side effects
- Missing required query parameters (age, GCS, or any boolean criterion) returns a 400 error
- Age below 16 or GCS outside 13–15 may produce an error or undefined behavior as the rule only applies to adults with minor head injury
- Mutually exclusive pta_ge_4h and pta_2_to_lt_4h both set to true may produce an error or unreliable result
- Payment not included or insufficient USDC balance returns a 402 Payment Required response
- GCS value outside integer range 13–15 will be rejected as invalid per the published rule
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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