magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Mediaofflineeip155:8453Exactvia cdp
Hcm-risk-scdHypertrophic-cmScdHemodynamicsCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 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 2026-09-01 17:32Z
—
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/hcm_risk_scd",
"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/hcm_risk_scd",
"tags": [
"hcm-risk-scd",
"hypertrophic-cm",
"scd",
"hemodynamics",
"calculator"
],
"mimeType": "application/json",
"description": "O'Mahony 2014 HCM Risk-SCD: 5-year SCD probability from wall thickness, LA diameter, LVOT gradient, family history of SCD, NSVT, unexplained syncope, and age. Returns prognostic_index, five_year_scd_risk_percent, and 4%/6% risk_band (lower / intermediate / higher). Not an ICD or device order. Not a medical device.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 40,
"nsvt": false,
"la_diameter_mm": 40,
"family_history_scd": false,
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20
}
},
"output": {
"type": "json",
"example": {
"age": 40,
"nsvt": false,
"formula": "hcm_risk_scd",
"citation": {
"id": "omahony-2014",
"doi": "10.1093/eurheartj/eht439",
"pmid": "24126876",
"title": "A novel clinical risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy (HCM Risk-SCD)",
"source": "Eur Heart J. 2014;35(30):2010-2020",
"authors": "O'Mahony C, Jichi F, Pavlou M, et al."
},
"risk_band": "lower",
"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.",
"la_diameter_mm": 40,
"prognostic_index": 2.416468,
"family_history_scd": false,
"formula_expression": "P_5y = 1 - 0.998^exp(PI); PI = 0.15939858*max_wall_thickness_mm - 0.00294271*max_wall_thickness_mm^2 + 0.0259082*la_diameter_mm + 0.00446131*max_lvot_gradient_mm_hg + 0.4583082*family_history_scd + 0.82639195*nsvt + 0.71650361*unexplained_syncope - 0.01799934*age; flags 1 if true else 0; O'Mahony 2014; risk_band <4 lower, 4 to <6 intermediate, >=6 higher",
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20,
"five_year_scd_risk_percent": 2.2
}
},
"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": [
"age",
"max_wall_thickness_mm",
"la_diameter_mm",
"max_lvot_gradient_mm_hg",
"family_history_scd",
"nsvt",
"unexplained_syncope"
],
"properties": {
"age": {
"type": "integer",
"description": "Age at clinical evaluation in years (integer 16-80). O'Mahony 2014 continuous predictor (coefficient -0.01799934). Derivation was HCM evaluated at 16 years or older. magent does not examine the patient."
},
"nsvt": {
"type": "boolean",
"description": "Non-sustained ventricular tachycardia as assigned by the caller (true=1, false=0). magent does not interpret Holter monitoring."
},
"la_diameter_mm": {
"type": "number",
"description": "Left-atrial diameter in mm (20.0-70.0). O'Mahony 2014 continuous predictor. magent does not measure the atrium."
},
"family_history_scd": {
"type": "boolean",
"description": "Family history of sudden cardiac death as assigned by the caller (true=1, false=0). magent does not take a family history."
},
"unexplained_syncope": {
"type": "boolean",
"description": "Unexplained syncope as assigned by the caller (true=1, false=0). magent does not adjudicate syncope."
},
"max_wall_thickness_mm": {
"type": "number",
"description": "Maximal left-ventricular wall thickness in mm (10.0-35.0). Enters as linear and squared terms. magent does not read an echocardiogram."
},
"max_lvot_gradient_mm_hg": {
"type": "number",
"description": "Maximal left-ventricular outflow-tract gradient in mm Hg (0.0-154.0). magent does not measure the gradient."
}
}
}
},
"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/hcm_risk_scd",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 40,
"nsvt": false,
"la_diameter_mm": 40,
"family_history_scd": false,
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20
},
{
"age": 40,
"nsvt": false,
"la_diameter_mm": 40,
"family_history_scd": false,
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/hcm_risk_scd",
"count": 2,
"items": [
{
"age": 40,
"nsvt": false,
"formula": "hcm_risk_scd",
"citation": {
"id": "omahony-2014",
"doi": "10.1093/eurheartj/eht439",
"pmid": "24126876",
"title": "A novel clinical risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy (HCM Risk-SCD)",
"source": "Eur Heart J. 2014;35(30):2010-2020",
"authors": "O'Mahony C, Jichi F, Pavlou M, et al."
},
"risk_band": "lower",
"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.",
"la_diameter_mm": 40,
"prognostic_index": 2.416468,
"family_history_scd": false,
"formula_expression": "P_5y = 1 - 0.998^exp(PI); PI = 0.15939858*max_wall_thickness_mm - 0.00294271*max_wall_thickness_mm^2 + 0.0259082*la_diameter_mm + 0.00446131*max_lvot_gradient_mm_hg + 0.4583082*family_history_scd + 0.82639195*nsvt + 0.71650361*unexplained_syncope - 0.01799934*age; flags 1 if true else 0; O'Mahony 2014; risk_band <4 lower, 4 to <6 intermediate, >=6 higher",
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20,
"five_year_scd_risk_percent": 2.2
},
{
"age": 40,
"nsvt": false,
"formula": "hcm_risk_scd",
"citation": {
"id": "omahony-2014",
"doi": "10.1093/eurheartj/eht439",
"pmid": "24126876",
"title": "A novel clinical risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy (HCM Risk-SCD)",
"source": "Eur Heart J. 2014;35(30):2010-2020",
"authors": "O'Mahony C, Jichi F, Pavlou M, et al."
},
"risk_band": "lower",
"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.",
"la_diameter_mm": 40,
"prognostic_index": 2.416468,
"family_history_scd": false,
"formula_expression": "P_5y = 1 - 0.998^exp(PI); PI = 0.15939858*max_wall_thickness_mm - 0.00294271*max_wall_thickness_mm^2 + 0.0259082*la_diameter_mm + 0.00446131*max_lvot_gradient_mm_hg + 0.4583082*family_history_scd + 0.82639195*nsvt + 0.71650361*unexplained_syncope - 0.01799934*age; flags 1 if true else 0; O'Mahony 2014; risk_band <4 lower, 4 to <6 intermediate, >=6 higher",
"unexplained_syncope": false,
"max_wall_thickness_mm": 20,
"max_lvot_gradient_mm_hg": 20,
"five_year_scd_risk_percent": 2.2
}
]
}
},
"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": [
"age",
"max_wall_thickness_mm",
"la_diameter_mm",
"max_lvot_gradient_mm_hg",
"family_history_scd",
"nsvt",
"unexplained_syncope"
],
"properties": {
"age": {
"type": "integer",
"description": "Age at clinical evaluation in years (integer 16-80). O'Mahony 2014 continuous predictor (coefficient -0.01799934). Derivation was HCM evaluated at 16 years or older. magent does not examine the patient."
},
"nsvt": {
"type": "boolean",
"description": "Non-sustained ventricular tachycardia as assigned by the caller (true=1, false=0). magent does not interpret Holter monitoring."
},
"la_diameter_mm": {
"type": "number",
"description": "Left-atrial diameter in mm (20.0-70.0). O'Mahony 2014 continuous predictor. magent does not measure the atrium."
},
"family_history_scd": {
"type": "boolean",
"description": "Family history of sudden cardiac death as assigned by the caller (true=1, false=0). magent does not take a family history."
},
"unexplained_syncope": {
"type": "boolean",
"description": "Unexplained syncope as assigned by the caller (true=1, false=0). magent does not adjudicate syncope."
},
"max_wall_thickness_mm": {
"type": "number",
"description": "Maximal left-ventricular wall thickness in mm (10.0-35.0). Enters as linear and squared terms. magent does not read an echocardiogram."
},
"max_lvot_gradient_mm_hg": {
"type": "number",
"description": "Maximal left-ventricular outflow-tract gradient in mm Hg (0.0-154.0). magent does not measure the gradient."
}
}
},
"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
- 2026-09-01 17:32Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 08:45Z
- 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. 8 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/hcm_risk_scd, 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.