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qCSI Calculator (Quick COVID-19 Severity Index)
x402
qCSI Calculator (Quick COVID-19 Severity Index) 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 Haimovich 2020 qCSI score (0–12) from respiratory rate, SpO2, and nasal-cannula oxygen flow, following the published Table 2 bedside points.
Price / call$0.005
Success—
StatusUnknown
How this service works
Haimovich 2020 qCSI (Table 2 bedside points): RR ≤22 → 0, 23–28 → 1, >28 → 2; SpO2 >92 → 0, 89–92 → 2, ≤88 → 5; O2 ≤2 L/min → 0, 3–4 → 4, 5–6 → 5. Max 12. Lowest SpO2 and nasal-cannula flow as assigned by the caller. Not a COVID-19 diagnosis, triage order, or the 12-variable CSI gradient-boosting model. Derivation excluded >6 L/min. magent does not measure vitals.
Output
Returns a numeric qCSI score between 0 and 12, derived from the summed Table 2 points for respiratory rate (≤22→0, 23–28→1, >28→2), SpO2 (>92→0, 89–92→2, ≤88→5), and nasal-cannula oxygen flow (≤2 L/min→0, 3–4→4, 5–6→5). Higher scores indicate greater respiratory severity. Does not diagnose COVID-19 or produce triage orders.
Example use cases
ED triage respiratory severity check
“My patient in the ED has a respiratory rate of 24, SpO2 of 91%, and is on 4 L/min nasal cannula — what's their qCSI score?”
Remote monitoring severity flag
“Flag this telehealth patient: RR is 30 breaths per minute, SpO2 is 87%, and they're on 5 L/min oxygen at home. Give me the qCSI bedside score.”
Inpatient COVID progression tracking
“Run the Haimovich qCSI for my inpatient: respiratory rate 22, SpO2 93%, on 2 L/min nasal cannula. I want to track how their score changes each shift.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/qcsiWhen to prefer
Use this endpoint when you need a fast, deterministic bedside qCSI computation following the exact Haimovich 2020 Table 2 point mapping, and your patient is on ≤6 L/min nasal cannula. Prefer it over manual lookup tables or the full 12-variable CSI gradient-boosting model when a simple, reproducible integer score from three vitals is sufficient. Not appropriate if the patient requires >6 L/min, uses a non-nasal-cannula device, or if you need COVID-19 diagnostic output.
Side effects
- Missing required parameter (respiratory_rate, spo2_percent, or oxygen_l_min) → validation error
- oxygen_l_min > 6 → outside derivation cohort, result may be unreliable or rejected
- respiratory_rate outside 4–80 or spo2_percent outside 50–100 → schema validation failure
- Non-integer respiratory_rate → type error
- Payment not provided or x402 authorization fails → 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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