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CHOSEN Score Calculator (COVID Home Safely Now)
x402
CHOSEN Score Calculator (COVID Home Safely Now) 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).
Computes the Levine 2020 CHOSEN score (0–55) for COVID-19 patients based on age, SpO2, and serum albumin to estimate likelihood of event-free home monitoring.
Price / call$0.005
Success—
StatusUnknown
How this service works
Levine 2020 CHOSEN (COVID Home Safely Now): age 18-45 +5, 46-59 +2, 60-73 +1, >73 +0; SpO2 <94 +0, 94-96 +9, 97-98 +14, >98 +21; albumin g/dL <2.8 +0, 2.8-3.3 +5, 3.4-3.7 +15, >3.7 +29. Score 0-55. Cutpoint 30 (derivation sensitivity 83%, specificity 82%). Higher score favored event-free status in the paper. Not a discharge order.
Output
Returns the computed CHOSEN score (integer 0–55) derived from age-band, SpO2-band, and albumin-band point contributions as defined in Levine 2020 Figure 2. Scores ≥30 indicate higher likelihood of event-free status based on the derivation cohort (sensitivity 83%, specificity 82%). The result is a clinical decision-support value, not a discharge order.
Example use cases
ED triage for COVID home monitoring
“My patient is a 41-year-old COVID-positive adult with SpO2 reading of 98% and serum albumin of 3.5 g/dL — can you calculate the CHOSEN score and tell me if they're above the cutpoint of 30?”
Telemedicine discharge risk check
“I'm doing a telehealth visit with a 67-year-old COVID patient whose SpO2 is 95% and albumin came back at 2.9 g/dL — run the Levine 2020 CHOSEN score for them so I know where they land.”
Retrospective cohort chart review
“For our chart review, calculate the CHOSEN score for each of these patients: first one is 80 years old, SpO2 96%, albumin 3.6 g/dL — what does their score come out to?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/chosenWhen to prefer
Choose this endpoint when you need a standardized, validated CHOSEN score computation per the exact Levine 2020 band definitions, avoiding manual point-lookup errors. Prefer it over general-purpose LLM arithmetic for auditability and consistency. Use when building clinical triage workflows, telehealth discharge tools, or retrospective research pipelines that require reproducible COVID home monitoring risk scores.
Side effects
- Missing required query parameters (age, spo2_percent, albumin_g_dl) returns a 400 error
- Age outside 18–120 integer range returns validation error
- SpO2 outside 50–100 range returns validation error
- Albumin outside 1.0–6.0 g/dL range returns validation error
- Albumin provided in wrong units (g/L instead of g/dL) will silently produce incorrect score
- Payment not attached or insufficient USDC balance returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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