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magent NDI Calculator (Vernon 1991)
x402
magent NDI Calculator (Vernon 1991) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Computes the Vernon 1991 Neck Disability Index (NDI) raw score and severity band from ten caller-supplied 0–5 item scores
Price / call$0.005
Success—
StatusUnknown
How this service works
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.
Output
Returns the NDI raw sum (integer 0–50, sum of the ten input subscores) and the Vernon 1991 severity band: none (0–4), mild (5–14), moderate (15–24), severe (25–34), or complete (>34). Does not apply percentage-based variants or produce a diagnosis.
Example use cases
Pre-clinic neck disability triage
“A patient filled out their NDI items before their appointment: pain intensity 4, personal care 3, lifting 5, reading 2, headaches 3, concentration 4, work 4, driving 3, sleeping 4, recreation 4. Calculate the Vernon 1991 NDI raw score and tell me which severity band they fall into.”
Research data pipeline scoring
“I have NDI subscore data from 50 enrolled participants — for the next patient their scores are: pain 2, personal care 1, lifting 2, reading 1, headaches 1, concentration 2, work 2, driving 1, sleeping 1, recreation 1. Compute their Vernon 1991 NDI total and band for the database.”
Post-treatment outcome comparison
“My patient finished physical therapy. Their follow-up NDI subscores are: pain intensity 1, personal care 1, lifting 1, reading 0, headaches 1, concentration 1, work 1, driving 0, sleeping 1, recreation 0. What is their Vernon 1991 NDI total and severity classification now?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/ndiWhen to prefer
Use this endpoint when you need a strictly Vernon 1991 NDI raw-score calculation with the original 0–4/5–14/15–24/25–34/>34 severity bands. Prefer it over manual summation for auditability and when you need a structured band label returned automatically. Do not use it for percentage-converted NDI variants, Oswestry Disability Index scoring, or any other outcome measure.
Side effects
- Missing any of the ten required query parameters returns an error
- Any subscore outside integer range 0–5 is rejected
- Non-integer or non-numeric input for subscores fails validation
- HTTP 402 if payment header is absent or insufficient (x402 protocol)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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