Levine 2020 CHOSEN (COVID Home Safely Now)
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.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
284 msmedian answer time
$0.005listed price per call
$0.007price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.magentlab.com/api/calc/chosen
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 284 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"age": 40,
"albumin_g_dl": 4,
"spo2_percent": 99
},
{
"age": 40,
"albumin_g_dl": 4,
"spo2_percent": 99
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"age": {
"description": "Age in years (integer 18-120). Levine 2020 Figure 2: 18-45 \u2192 5; 46-59 \u2192 2; 60-73 \u2192 1; >73 \u2192 0. Age 73 scores 1; age 74 scores 0. Adults as in the derivation cohort.",
"type": "integer"
},
"albumin_g_dl": {
"description": "Serum albumin in g/dL (1.0-6.0). Levine 2020 Figure 2: <2.8 \u2192 0; 2.8-3.3 \u2192 5; 3.4-3.7 \u2192 15; >3.7 \u2192 29. Not g/L. magent does not assay albumin.",
"type": "number"
},
"spo2_percent": {
"description": "Oxygen saturation percent (50-100). Levine 2020 Figure 2: <94 \u2192 0; 94-96 \u2192 9; 97-98 \u2192 14; >98 \u2192 21. magent does not measure SpO2.",
"type": "number"
}
},
"required": [
"age",
"spo2_percent",
"albumin_g_dl"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}