Vernon 1991 Neck Disability Index
Vernon 1991 Neck Disability Index: ten caller-assigned integers 0-5 (pain intensity, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, recreation). Sum 0-50. Vernon 1991 raw-score bands 0-4 none, 5-14 mild, 15-24 moderate, 25-34 severe, >34 complete. Does not apply later 0-8%/10-28% website percentage bands or score Oswestry. magent does not interview. Not a diagnosis and 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
306 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/ndi
| 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 | $0.007 | 306 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"concentration": 0,
"driving": 0,
"headaches": 0,
"lifting": 0,
"pain_intensity": 0,
"personal_care": 0,
"reading": 0,
"recreation": 0,
"sleeping": 0,
"work": 0
},
{
"concentration": 0,
"driving": 0,
"headaches": 0,
"lifting": 0,
"pain_intensity": 0,
"personal_care": 0,
"reading": 0,
"recreation": 0,
"sleeping": 0,
"work": 0
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"concentration": {
"description": "Caller-assigned Vernon 1991 NDI concentration (integer 0-5): 0 can concentrate fully with no difficulty through 5 cannot concentrate at all. magent does not interview the patient.",
"type": "integer"
},
"driving": {
"description": "Caller-assigned Vernon 1991 NDI driving (integer 0-5): 0 can drive without neck pain through 5 cannot drive at all. magent does not interview the patient.",
"type": "integer"
},
"headaches": {
"description": "Caller-assigned Vernon 1991 NDI headaches (integer 0-5): 0 no headaches through 5 headaches almost all the time. magent does not interview the patient.",
"type": "integer"
},
"lifting": {
"description": "Caller-assigned Vernon 1991 NDI lifting (integer 0-5): 0 can lift heavy weights without extra pain through 5 cannot lift or carry anything. magent does not interview the patient.",
"type": "integer"
},
"pain_intensity": {
"description": "Caller-assigned Vernon 1991 NDI pain intensity (integer 0-5): 0 no pain at the moment through 5 worst imaginable pain at the moment. magent does not interview the patient.",
"type": "integer"
},
"personal_care": {
"description": "Caller-assigned Vernon 1991 NDI personal care (washing, dressing) (integer 0-5): 0 looks after self normally without extra pain through 5 does not get dressed, washes with difficulty and stays in bed. magent does not interview the patient.",
"type": "integer"
},
"reading": {
"description": "Caller-assigned Vernon 1991 NDI reading (integer 0-5): 0 can read as much as wanted with no neck pain through 5 cannot read at all. magent does not interview the patient.",
"type": "integer"
},
"recreation": {
"description": "Caller-assigned Vernon 1991 NDI recreation (integer 0-5): 0 can engage in all recreation activities with no neck pain through 5 cannot do any recreation activities. magent does not interview the patient.",
"type": "integer"
},
"sleeping": {
"description": "Caller-assigned Vernon 1991 NDI sleeping (integer 0-5): 0 no trouble sleeping through 5 sleep completely disturbed (5-7 hours sleepless). magent does not interview the patient.",
"type": "integer"
},
"work": {
"description": "Caller-assigned Vernon 1991 NDI work (integer 0-5): 0 can do as much work as wanted through 5 cannot do any work at all. magent does not interview the patient.",
"type": "integer"
}
},
"required": [
"pain_intensity",
"personal_care",
"lifting",
"reading",
"headaches",
"concentration",
"work",
"driving",
"sleeping",
"recreation"
],
"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"
}