Bell 2023 C-DIVA from four caller-assigned 0-2 domains (visual appearance, palpa
Bell 2023 C-DIVA from four caller-assigned 0-2 domains (visual appearance, palpable sites, history of difficult access, clinical factors) using that paper's Figure 1 0/1/2 descriptors. magent sums only (max 8) and returns Figure 1 bands low (0-3), medium (4-5), or high (6-8). magent does not examine veins or insert a catheter. Not a vascular-access order, not a medical device.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
299 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/c_diva
| 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 | $0.007 | 299 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"clinical_factors": 0,
"history_of_difficult_access": 0,
"palpable_sites": 0,
"visual_appearance": 0
},
{
"clinical_factors": 0,
"history_of_difficult_access": 0,
"palpable_sites": 0,
"visual_appearance": 0
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"clinical_factors": {
"description": "Caller-assigned Bell 2023 Figure 1 clinical factors (integer 0-2): 0 not applicable; 1 pediatric patients or urgent conditions (ESI 3-4); 2 comorbidities or emergency conditions (ESI 1-2). magent does not assign ESI or examine the patient.",
"type": "integer"
},
"history_of_difficult_access": {
"description": "Caller-assigned Bell 2023 Figure 1 history of difficult access (integer 0-2): 0 no difficulty; 1 reported difficulty or recent missed attempts; 2 history of major difficulty as evidenced by previous central lines or PICCs. magent does not take a history.",
"type": "integer"
},
"palpable_sites": {
"description": "Caller-assigned Bell 2023 Figure 1 palpable sites (integer 0-2): 0 many palpable veins; 1 few palpable veins; 2 no palpable veins. magent does not examine the patient.",
"type": "integer"
},
"visual_appearance": {
"description": "Caller-assigned Bell 2023 Figure 1 visual appearance (integer 0-2): 0 many visible veins; 1 few visible veins; 2 no visible veins. magent does not examine the patient.",
"type": "integer"
}
},
"required": [
"visual_appearance",
"palpable_sites",
"history_of_difficult_access",
"clinical_factors"
],
"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"
}