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magent Jones Criteria for Acute Rheumatic Fever (Gewitz 2015)
x402
magent Jones Criteria for Acute Rheumatic Fever (Gewitz 2015) 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 2015 AHA/Gewitz revised Jones criteria (Table 7) to classify whether a patient meets diagnostic criteria for acute rheumatic fever (ARF) based on caller-assigned clinical findings and population risk stratum.
Price / call$0.005
Success—
StatusUnknown
How this service works
Gewitz 2015 AHA Jones criteria (Table 7). jones_arf iff evidence_of_preceding_gas and the episode rule: initial 2 major or 1 major plus 2 minor; recurrent also allows 3 minor. Majors/minors follow population_risk for arthritis vs arthralgia, fever, and ESR/CRP. Prolonged PR does not count with carditis. Joints count in major or minor, not both. magent does not examine the patient or read an echocardiogram. Not Jones 1944. Not a diagnosis. Not a medical device.
Output
Returns a jones_arf boolean indicating whether the patient meets the 2015 AHA/Gewitz Jones criteria for acute rheumatic fever, along with counts and eligibility flags for each major and minor criterion applied under the specified population risk stratum and episode type. Accounts for rules such as: joints counting in major or minor but not both, prolonged PR excluded when carditis is present, and fever and ESR/CRP thresholds varying by population risk.
Example use cases
Initial ARF evaluation in low-risk child
“I'm assessing a child in a low-risk population for their first possible rheumatic fever episode — they have confirmed preceding strep infection, clinical carditis, and polyarthritis, fever above 38.5°C, elevated ESR above 60, no chorea, no erythema marginatum, no nodules, and no prolonged PR. Do they meet the 2015 Jones criteria for initial ARF?”
Recurrent ARF with only minor criteria
“This is a recurrent ARF episode in a moderate-to-high risk patient — no carditis, no arthritis, no chorea, no rash or nodules, but the patient has fever over 38°C, elevated ESR/CRP (≥30 or CRP ≥3), and a prolonged PR interval. Does a recurrent episode with 3 minor criteria satisfy the Jones 2015 criteria?”
Moderate-high risk with arthralgia vs arthritis ambiguity
“For a moderate-high risk population patient with a suspected initial ARF episode: preceding GAS confirmed, monoarthralgia only (no true arthritis), no carditis, no chorea, no skin findings, fever ≥38.0°C, ESR/CRP ≥30, prolonged PR interval present — run the Gewitz 2015 Jones scoring and tell me whether they qualify.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/jonesWhen to prefer
Use this endpoint when you need a fast, rule-based application of the 2015 AHA/Gewitz revised Jones criteria to caller-assigned findings, particularly when population risk stratification (low vs moderate/high) affects arthritis vs arthralgia and fever threshold eligibility. Prefer this over manual Jones scoring when building clinical decision support tools, EHR integrations, or automated cardiology/rheumatology workflows. Not suitable as a replacement for clinical judgment, echocardiography interpretation, or ECG reading — the caller must supply all findings.
Side effects
- Missing required query parameters returns a validation error
- Invalid enum values for episode or population_risk return a 400-level error
- Contradictory inputs (e.g., joints counted in both major and minor) may produce unexpected scoring — caller must ensure mutual exclusivity
- prolonged_pr set to true with carditis true: PR is silently excluded from minor count per Jones rules
- Incorrect population_risk stratum leads to wrong fever and ESR/CRP threshold application
- Not a diagnosis — result is a criterion-matching flag, not a clinical determination
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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