magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
TradingLiveeip155:8453Exactvia cdp
NdiNeckDisabilityNeurologyCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far.
$13.75
Verified settled volume
2,750 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 23:55Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "PAYMENT-SIGNATURE header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/ndi",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"withdrawDelay": 86400,
"receiverAuthorizer": "0x3721824a31197dcDD2984cF43b92B6cc8A87c0Fb",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://api.magentlab.com/api/calc/ndi",
"tags": [
"ndi",
"neck",
"disability",
"neurology",
"calculator"
],
"mimeType": "application/json",
"description": "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.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"work": 0,
"driving": 0,
"lifting": 0,
"reading": 0,
"sleeping": 0,
"headaches": 0,
"recreation": 0,
"concentration": 0,
"personal_care": 0,
"pain_intensity": 0
}
},
"output": {
"type": "json",
"example": {
"score": 0,
"formula": "ndi",
"citation": {
"id": "vernon-1991",
"pmid": "1834753",
"title": "The Neck Disability Index: a study of reliability and validity",
"source": "J Manipulative Physiol Ther. 1991;14(7):409-415",
"authors": "Vernon H, Mior S"
},
"max_score": 50,
"components": [
{
"value": 0,
"factor": "pain_intensity",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "personal_care",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "lifting",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "reading",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "headaches",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "concentration",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "work",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "driving",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "sleeping",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "recreation",
"points": 0,
"present": true
}
],
"disability": "none",
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "NDI = pain_intensity + personal_care + lifting + reading + headaches + concentration + work + driving + sleeping + recreation; each caller-assigned 0-5; Vernon 1991 ten sections; max 50; raw 0-50 bands 0-4 none, 5-14 mild, 15-24 moderate, 25-34 severe, >34 complete"
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"required": [
"pain_intensity",
"personal_care",
"lifting",
"reading",
"headaches",
"concentration",
"work",
"driving",
"sleeping",
"recreation"
],
"properties": {
"work": {
"type": "integer",
"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."
},
"driving": {
"type": "integer",
"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."
},
"lifting": {
"type": "integer",
"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."
},
"reading": {
"type": "integer",
"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."
},
"sleeping": {
"type": "integer",
"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."
},
"headaches": {
"type": "integer",
"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."
},
"recreation": {
"type": "integer",
"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."
},
"concentration": {
"type": "integer",
"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."
},
"personal_care": {
"type": "integer",
"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."
},
"pain_intensity": {
"type": "integer",
"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."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x836B…19Ee2. The signed payment is good for 10 minutes.
- Paid to
- 0x836B…19Ee2
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/ndi",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"work": 0,
"driving": 0,
"lifting": 0,
"reading": 0,
"sleeping": 0,
"headaches": 0,
"recreation": 0,
"concentration": 0,
"personal_care": 0,
"pain_intensity": 0
},
{
"work": 0,
"driving": 0,
"lifting": 0,
"reading": 0,
"sleeping": 0,
"headaches": 0,
"recreation": 0,
"concentration": 0,
"personal_care": 0,
"pain_intensity": 0
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/ndi",
"count": 2,
"items": [
{
"score": 0,
"formula": "ndi",
"citation": {
"id": "vernon-1991",
"pmid": "1834753",
"title": "The Neck Disability Index: a study of reliability and validity",
"source": "J Manipulative Physiol Ther. 1991;14(7):409-415",
"authors": "Vernon H, Mior S"
},
"max_score": 50,
"components": [
{
"value": 0,
"factor": "pain_intensity",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "personal_care",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "lifting",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "reading",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "headaches",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "concentration",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "work",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "driving",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "sleeping",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "recreation",
"points": 0,
"present": true
}
],
"disability": "none",
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "NDI = pain_intensity + personal_care + lifting + reading + headaches + concentration + work + driving + sleeping + recreation; each caller-assigned 0-5; Vernon 1991 ten sections; max 50; raw 0-50 bands 0-4 none, 5-14 mild, 15-24 moderate, 25-34 severe, >34 complete"
},
{
"score": 0,
"formula": "ndi",
"citation": {
"id": "vernon-1991",
"pmid": "1834753",
"title": "The Neck Disability Index: a study of reliability and validity",
"source": "J Manipulative Physiol Ther. 1991;14(7):409-415",
"authors": "Vernon H, Mior S"
},
"max_score": 50,
"components": [
{
"value": 0,
"factor": "pain_intensity",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "personal_care",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "lifting",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "reading",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "headaches",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "concentration",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "work",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "driving",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "sleeping",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "recreation",
"points": 0,
"present": true
}
],
"disability": "none",
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "NDI = pain_intensity + personal_care + lifting + reading + headaches + concentration + work + driving + sleeping + recreation; each caller-assigned 0-5; Vernon 1991 ten sections; max 50; raw 0-50 bands 0-4 none, 5-14 mild, 15-24 moderate, 25-34 severe, >34 complete"
}
]
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"pain_intensity",
"personal_care",
"lifting",
"reading",
"headaches",
"concentration",
"work",
"driving",
"sleeping",
"recreation"
],
"properties": {
"work": {
"type": "integer",
"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."
},
"driving": {
"type": "integer",
"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."
},
"lifting": {
"type": "integer",
"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."
},
"reading": {
"type": "integer",
"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."
},
"sleeping": {
"type": "integer",
"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."
},
"headaches": {
"type": "integer",
"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."
},
"recreation": {
"type": "integer",
"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."
},
"concentration": {
"type": "integer",
"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."
},
"personal_care": {
"type": "integer",
"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."
},
"pain_intensity": {
"type": "integer",
"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."
}
}
},
"maxItems": 25,
"minItems": 1
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"const": "POST"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-31 23:55Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 20:45Z
- x402 version
- 2
- Max timeout
- 600s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service magent and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=magent' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.magentlab.com/api/calc/ndi, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.