magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
Sudbury-vertigoVertigoNeurologyEmergencyCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:34Z
—
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/sudbury_vertigo",
"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/sudbury_vertigo",
"tags": [
"sudbury-vertigo",
"vertigo",
"neurology",
"emergency",
"calculator"
],
"mimeType": "application/json",
"description": "Ohle 2025 Sudbury vertigo ED score (Table 2): male 1, age>65 flag 1, diabetes 1, hypertension 3, motor or sensory deficit 5, cerebellar signs 6, BPPV -5. Returns score (female+BPPV -5, not clamped), max 17, Table 3 bands lt_5 / 5_to_8 / gt_8 (0.0 / 2.1 / 41.0%), and investigate_further if score >4. Not a medical device, stroke diagnosis, CT order, HINTS, or HINTS-plus. magent does not examine the patient. Age is the age>65 flag, not years.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"sex": "female",
"diabetes": false,
"age_gt_65": false,
"hypertension": false,
"bppv_diagnosis": false,
"cerebellar_signs": false,
"motor_or_sensory_deficit": false
}
},
"output": {
"type": "json",
"example": {
"sex": "female",
"score": 0,
"formula": "sudbury_vertigo",
"citation": {
"id": "ohle-2025",
"doi": "10.1016/j.annemergmed.2024.06.003",
"pmid": "39093245",
"title": "Development of a Clinical Risk Score to Risk Stratify for a Serious Cause of Vertigo in Patients Presenting to the Emergency Department",
"source": "Ann Emerg Med. 2025;85(2):122-131",
"authors": "Ohle R, Savage DW, Roy D, et al."
},
"diabetes": false,
"age_gt_65": false,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"factor": "age_gt_65",
"points": 0,
"present": false
},
{
"factor": "diabetes",
"points": 0,
"present": false
},
{
"factor": "hypertension",
"points": 0,
"present": false
},
{
"factor": "motor_or_sensory_deficit",
"points": 0,
"present": false
},
{
"factor": "cerebellar_signs",
"points": 0,
"present": false
},
{
"factor": "bppv_diagnosis",
"points": 0,
"present": false
}
],
"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.",
"hypertension": false,
"sudbury_band": "lt_5",
"bppv_diagnosis": false,
"cerebellar_signs": false,
"formula_expression": "Sudbury vertigo = male 1 + age_gt_65 1 + diabetes 1 + hypertension 3 + motor_or_sensory_deficit 5 + cerebellar_signs 6 + bppv_diagnosis -5; Ohle 2025 Table 2; Table 3 bands score <5 -> 0.0%, 5-8 -> 2.1%, >8 -> 41.0%; investigate_further iff score >4; max 17 (sum of positive weights; BPPV is negative and not in the max); do not clamp",
"investigate_further": false,
"serious_cause_percent": 0,
"motor_or_sensory_deficit": false
}
},
"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": [
"sex",
"age_gt_65",
"diabetes",
"hypertension",
"motor_or_sensory_deficit",
"cerebellar_signs",
"bppv_diagnosis"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male (Ohle 2025 Table 2). Male scores 1. Female scores 0. Assigned by the caller. Do not send a male boolean."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller (Ohle 2025 Table 2). true or false. 1 point if true. magent does not examine the patient."
},
"age_gt_65": {
"type": "boolean",
"description": "Age greater than 65 as a published yes/no flag (Ohle 2025 Table 2). true scores 1. Age 65 scores 0. true or false. Do not send years. magent does not measure age."
},
"hypertension": {
"type": "boolean",
"description": "Hypertension as assigned by the caller (Ohle 2025 Table 2). true or false. 3 points if true. magent does not measure blood pressure."
},
"bppv_diagnosis": {
"type": "boolean",
"description": "BPPV diagnosis as assigned by the caller (Ohle 2025 Table 2). true or false. -5 points if true. magent does not examine the patient."
},
"cerebellar_signs": {
"type": "boolean",
"description": "Cerebellar signs as assigned by the caller (Ohle 2025 Table 2 footnote: diplopia, dysarthria, dysphagia, dysmetria, ataxia). true or false. 6 points if true. magent does not examine the patient."
},
"motor_or_sensory_deficit": {
"type": "boolean",
"description": "Motor or sensory deficit as assigned by the caller (Ohle 2025 Table 2). true or false. 5 points if true. magent does not examine 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/sudbury_vertigo",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"sex": "female",
"diabetes": false,
"age_gt_65": false,
"hypertension": false,
"bppv_diagnosis": false,
"cerebellar_signs": false,
"motor_or_sensory_deficit": false
},
{
"sex": "female",
"diabetes": false,
"age_gt_65": false,
"hypertension": false,
"bppv_diagnosis": false,
"cerebellar_signs": false,
"motor_or_sensory_deficit": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/sudbury_vertigo",
"count": 2,
"items": [
{
"sex": "female",
"score": 0,
"formula": "sudbury_vertigo",
"citation": {
"id": "ohle-2025",
"doi": "10.1016/j.annemergmed.2024.06.003",
"pmid": "39093245",
"title": "Development of a Clinical Risk Score to Risk Stratify for a Serious Cause of Vertigo in Patients Presenting to the Emergency Department",
"source": "Ann Emerg Med. 2025;85(2):122-131",
"authors": "Ohle R, Savage DW, Roy D, et al."
},
"diabetes": false,
"age_gt_65": false,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"factor": "age_gt_65",
"points": 0,
"present": false
},
{
"factor": "diabetes",
"points": 0,
"present": false
},
{
"factor": "hypertension",
"points": 0,
"present": false
},
{
"factor": "motor_or_sensory_deficit",
"points": 0,
"present": false
},
{
"factor": "cerebellar_signs",
"points": 0,
"present": false
},
{
"factor": "bppv_diagnosis",
"points": 0,
"present": false
}
],
"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.",
"hypertension": false,
"sudbury_band": "lt_5",
"bppv_diagnosis": false,
"cerebellar_signs": false,
"formula_expression": "Sudbury vertigo = male 1 + age_gt_65 1 + diabetes 1 + hypertension 3 + motor_or_sensory_deficit 5 + cerebellar_signs 6 + bppv_diagnosis -5; Ohle 2025 Table 2; Table 3 bands score <5 -> 0.0%, 5-8 -> 2.1%, >8 -> 41.0%; investigate_further iff score >4; max 17 (sum of positive weights; BPPV is negative and not in the max); do not clamp",
"investigate_further": false,
"serious_cause_percent": 0,
"motor_or_sensory_deficit": false
},
{
"sex": "female",
"score": 0,
"formula": "sudbury_vertigo",
"citation": {
"id": "ohle-2025",
"doi": "10.1016/j.annemergmed.2024.06.003",
"pmid": "39093245",
"title": "Development of a Clinical Risk Score to Risk Stratify for a Serious Cause of Vertigo in Patients Presenting to the Emergency Department",
"source": "Ann Emerg Med. 2025;85(2):122-131",
"authors": "Ohle R, Savage DW, Roy D, et al."
},
"diabetes": false,
"age_gt_65": false,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"factor": "age_gt_65",
"points": 0,
"present": false
},
{
"factor": "diabetes",
"points": 0,
"present": false
},
{
"factor": "hypertension",
"points": 0,
"present": false
},
{
"factor": "motor_or_sensory_deficit",
"points": 0,
"present": false
},
{
"factor": "cerebellar_signs",
"points": 0,
"present": false
},
{
"factor": "bppv_diagnosis",
"points": 0,
"present": false
}
],
"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.",
"hypertension": false,
"sudbury_band": "lt_5",
"bppv_diagnosis": false,
"cerebellar_signs": false,
"formula_expression": "Sudbury vertigo = male 1 + age_gt_65 1 + diabetes 1 + hypertension 3 + motor_or_sensory_deficit 5 + cerebellar_signs 6 + bppv_diagnosis -5; Ohle 2025 Table 2; Table 3 bands score <5 -> 0.0%, 5-8 -> 2.1%, >8 -> 41.0%; investigate_further iff score >4; max 17 (sum of positive weights; BPPV is negative and not in the max); do not clamp",
"investigate_further": false,
"serious_cause_percent": 0,
"motor_or_sensory_deficit": false
}
]
}
},
"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": [
"sex",
"age_gt_65",
"diabetes",
"hypertension",
"motor_or_sensory_deficit",
"cerebellar_signs",
"bppv_diagnosis"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male (Ohle 2025 Table 2). Male scores 1. Female scores 0. Assigned by the caller. Do not send a male boolean."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller (Ohle 2025 Table 2). true or false. 1 point if true. magent does not examine the patient."
},
"age_gt_65": {
"type": "boolean",
"description": "Age greater than 65 as a published yes/no flag (Ohle 2025 Table 2). true scores 1. Age 65 scores 0. true or false. Do not send years. magent does not measure age."
},
"hypertension": {
"type": "boolean",
"description": "Hypertension as assigned by the caller (Ohle 2025 Table 2). true or false. 3 points if true. magent does not measure blood pressure."
},
"bppv_diagnosis": {
"type": "boolean",
"description": "BPPV diagnosis as assigned by the caller (Ohle 2025 Table 2). true or false. -5 points if true. magent does not examine the patient."
},
"cerebellar_signs": {
"type": "boolean",
"description": "Cerebellar signs as assigned by the caller (Ohle 2025 Table 2 footnote: diplopia, dysarthria, dysphagia, dysmetria, ataxia). true or false. 6 points if true. magent does not examine the patient."
},
"motor_or_sensory_deficit": {
"type": "boolean",
"description": "Motor or sensory deficit as assigned by the caller (Ohle 2025 Table 2). true or false. 5 points if true. magent does not examine 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 13:34Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 21:45Z
- x402 version
- 2
- Max timeout
- 600s
- Liveness probe
- HTTP 0
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. 12 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/sudbury_vertigo, 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.