Schwartz 2009 bedside eGFR for children with CKD (CKiD)
Schwartz 2009 bedside eGFR for children with CKD (CKiD): 0.413 × height in cm divided by serum creatinine in mg/dL, rounded to one decimal as mL/min/1.73m2. Height may be centimeters or inches; creatinine may be mg/dL or µmol/L. Not a dosing recommendation, not CKD-EPI, not Cockcroft–Gault, and not the 1976 Schwartz k=0.55 formula. Does not assign CKD stages.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
259 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/schwartz_gfr
| 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 | $0.007 | 259 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"creatinine_mg_dl": 1,
"creatinine_umol_l": 88.42,
"height_cm": 140,
"height_in": 60
},
{
"creatinine_mg_dl": 1,
"creatinine_umol_l": 88.42,
"height_cm": 140,
"height_in": 60
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"creatinine_mg_dl": {
"description": "Serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l.",
"type": "number"
},
"creatinine_umol_l": {
"description": "Serum creatinine in \u00b5mol/L (9-1768). Converted as mg/dL = \u00b5mol/L / 88.42.",
"type": "number"
},
"height_cm": {
"description": "Height in centimeters (50-250). Provide height_cm or height_in.",
"type": "number"
},
"height_in": {
"description": "Height in inches (20-98). Converted as cm = in * 2.54.",
"type": "number"
}
},
"required": [],
"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"
}