Saisho 2011 CPR index
Saisho 2011 CPR index: serum C-peptide (ng/mL) / plasma glucose (mg/dL) * 100, two decimals. timing fasting or postprandial (same formula; required label). below_best_cutoff true iff cpri < 2.02 (ROC for later insulin therapy; 80.8% sensitivity, 63.3% specificity). Glucose mg/dL only. Not HOMA-IR, not a diabetes diagnosis, not C-peptide alone, and not an insulin order.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
271 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/cpri
| 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 | $0.007 | 271 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"c_peptide_ng_ml": 2.02,
"glucose_mg_dl": 100,
"timing": "postprandial"
},
{
"c_peptide_ng_ml": 2.02,
"glucose_mg_dl": 100,
"timing": "postprandial"
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"c_peptide_ng_ml": {
"description": "Serum C-peptide in ng/mL (0-40). Saisho 2011 CPR units.",
"type": "number"
},
"glucose_mg_dl": {
"description": "Plasma glucose in mg/dL (50-1000). mg/dL only; magent does not convert mmol/L.",
"type": "number"
},
"timing": {
"description": "Sample timing as assigned by the caller: fasting or postprandial. Same CPR-index arithmetic; magent does not pick a formula from the clock.",
"enum": [
"fasting",
"postprandial"
],
"type": "string"
}
},
"required": [
"timing",
"c_peptide_ng_ml",
"glucose_mg_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"
}