magent
Antzelevitch 2016 Shanghai Score System (Table 2) for Brugada syndrome. Caller assigns ECG (spontaneous type 1 3.5, fever type 1 3, drug-converted type 2/3 2; required; highest only), clinical history (0–3), family history (0–2), and pathogenic BrS-gene mutation (0.5). Bands: probable_definite ≥3.5, possible 2–3. magent does not read tracings. Not a diagnosis or ICD indication. Not the ERS Table 5 score.
Tradingofflineeip155:8453Exactvia cdp
ShanghaiBrugadaEcgJ-waveCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 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 2026-09-02 06:14Z
—
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/shanghai",
"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/shanghai",
"tags": [
"shanghai",
"brugada",
"ecg",
"j-wave",
"calculator"
],
"mimeType": "application/json",
"description": "Antzelevitch 2016 Shanghai Score System (Table 2) for Brugada syndrome. Caller assigns ECG (spontaneous type 1 3.5, fever type 1 3, drug-converted type 2/3 2; required; highest only), clinical history (0–3), family history (0–2), and pathogenic BrS-gene mutation (0.5). Bands: probable_definite ≥3.5, possible 2–3. magent does not read tracings. Not a diagnosis or ICD indication. Not the ERS Table 5 score.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"family": "none",
"clinical": "none",
"ecg_pattern": "spontaneous_type1",
"pathogenic_mutation": false
}
},
"output": {
"type": "json",
"example": {
"score": 3.5,
"family": "none",
"formula": "shanghai",
"citation": {
"id": "antzelevitch-2016",
"doi": "10.1016/j.hrthm.2016.05.024",
"pmid": "27423412",
"title": "J-Wave syndromes expert consensus conference report: Emerging concepts and gaps in knowledge",
"source": "Heart Rhythm. 2016;13(10):e295-e324",
"authors": "Antzelevitch C, Yan GX, Ackerman MJ, Borggrefe M, Corrado D, Guo J, et al."
},
"clinical": "none",
"max_score": 9,
"components": [
{
"value": "spontaneous_type1",
"factor": "ecg_pattern",
"points": 3.5,
"present": true
},
{
"value": "none",
"factor": "clinical",
"points": 0,
"present": false
},
{
"value": "none",
"factor": "family",
"points": 0,
"present": false
},
{
"value": false,
"factor": "pathogenic_mutation",
"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.",
"ecg_pattern": "spontaneous_type1",
"shanghai_band": "probable_definite",
"formula_expression": "Shanghai Table 2 (Antzelevitch 2016): ECG required, highest only (spontaneous_type1 3.5, fever_type1 3, drug_converted_type2_3 2) + clinical highest only (vf_arrest 3, nocturnal_agonal 2, arrhythmic_syncope 2, unclear_syncope 1, af_under_30 0.5, none 0) + family highest only (relative_definite_brs 2, suspicious_scd 1, unexplained_scd_under_45 0.5, none 0) + pathogenic_mutation 0.5; max 9; probable_definite ≥3.5, possible 2–3, nondiagnostic <2. Not ERS Table 5",
"pathogenic_mutation": 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": [
"ecg_pattern",
"pathogenic_mutation"
],
"properties": {
"family": {
"enum": [
"relative_definite_brs",
"suspicious_scd",
"unexplained_scd_under_45",
"none"
],
"type": "string",
"description": "Highest Table 2 family-history item as assigned by the caller (Antzelevitch 2016). relative_definite_brs 2; suspicious_scd 1; unexplained_scd_under_45 0.5; none 0. Optional; omitted defaults to none. Award once (highest item only). magent does not take a pedigree."
},
"clinical": {
"enum": [
"vf_arrest",
"nocturnal_agonal",
"arrhythmic_syncope",
"unclear_syncope",
"af_under_30",
"none"
],
"type": "string",
"description": "Highest Table 2 clinical-history item as assigned by the caller (Antzelevitch 2016). vf_arrest 3; nocturnal_agonal 2; arrhythmic_syncope 2; unclear_syncope 1; af_under_30 0.5; none 0. Optional; omitted defaults to none. Award once (highest item only). magent does not take a history."
},
"ecg_pattern": {
"enum": [
"spontaneous_type1",
"fever_type1",
"drug_converted_type2_3"
],
"type": "string",
"description": "Highest Table 2 ECG finding as assigned by the caller (Antzelevitch 2016). spontaneous_type1 scores 3.5; fever_type1 scores 3; drug_converted_type2_3 scores 2. At least one ECG finding is required. Award once (highest item only). magent does not read tracings."
},
"pathogenic_mutation": {
"type": "boolean",
"description": "Probable pathogenic mutation in a BrS susceptibility gene (Antzelevitch 2016 Table 2 IV). true scores 0.5; false scores 0. magent does not interpret sequencing."
}
}
}
},
"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/shanghai",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"family": "none",
"clinical": "none",
"ecg_pattern": "spontaneous_type1",
"pathogenic_mutation": false
},
{
"family": "none",
"clinical": "none",
"ecg_pattern": "spontaneous_type1",
"pathogenic_mutation": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/shanghai",
"count": 2,
"items": [
{
"score": 3.5,
"family": "none",
"formula": "shanghai",
"citation": {
"id": "antzelevitch-2016",
"doi": "10.1016/j.hrthm.2016.05.024",
"pmid": "27423412",
"title": "J-Wave syndromes expert consensus conference report: Emerging concepts and gaps in knowledge",
"source": "Heart Rhythm. 2016;13(10):e295-e324",
"authors": "Antzelevitch C, Yan GX, Ackerman MJ, Borggrefe M, Corrado D, Guo J, et al."
},
"clinical": "none",
"max_score": 9,
"components": [
{
"value": "spontaneous_type1",
"factor": "ecg_pattern",
"points": 3.5,
"present": true
},
{
"value": "none",
"factor": "clinical",
"points": 0,
"present": false
},
{
"value": "none",
"factor": "family",
"points": 0,
"present": false
},
{
"value": false,
"factor": "pathogenic_mutation",
"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.",
"ecg_pattern": "spontaneous_type1",
"shanghai_band": "probable_definite",
"formula_expression": "Shanghai Table 2 (Antzelevitch 2016): ECG required, highest only (spontaneous_type1 3.5, fever_type1 3, drug_converted_type2_3 2) + clinical highest only (vf_arrest 3, nocturnal_agonal 2, arrhythmic_syncope 2, unclear_syncope 1, af_under_30 0.5, none 0) + family highest only (relative_definite_brs 2, suspicious_scd 1, unexplained_scd_under_45 0.5, none 0) + pathogenic_mutation 0.5; max 9; probable_definite ≥3.5, possible 2–3, nondiagnostic <2. Not ERS Table 5",
"pathogenic_mutation": false
},
{
"score": 3.5,
"family": "none",
"formula": "shanghai",
"citation": {
"id": "antzelevitch-2016",
"doi": "10.1016/j.hrthm.2016.05.024",
"pmid": "27423412",
"title": "J-Wave syndromes expert consensus conference report: Emerging concepts and gaps in knowledge",
"source": "Heart Rhythm. 2016;13(10):e295-e324",
"authors": "Antzelevitch C, Yan GX, Ackerman MJ, Borggrefe M, Corrado D, Guo J, et al."
},
"clinical": "none",
"max_score": 9,
"components": [
{
"value": "spontaneous_type1",
"factor": "ecg_pattern",
"points": 3.5,
"present": true
},
{
"value": "none",
"factor": "clinical",
"points": 0,
"present": false
},
{
"value": "none",
"factor": "family",
"points": 0,
"present": false
},
{
"value": false,
"factor": "pathogenic_mutation",
"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.",
"ecg_pattern": "spontaneous_type1",
"shanghai_band": "probable_definite",
"formula_expression": "Shanghai Table 2 (Antzelevitch 2016): ECG required, highest only (spontaneous_type1 3.5, fever_type1 3, drug_converted_type2_3 2) + clinical highest only (vf_arrest 3, nocturnal_agonal 2, arrhythmic_syncope 2, unclear_syncope 1, af_under_30 0.5, none 0) + family highest only (relative_definite_brs 2, suspicious_scd 1, unexplained_scd_under_45 0.5, none 0) + pathogenic_mutation 0.5; max 9; probable_definite ≥3.5, possible 2–3, nondiagnostic <2. Not ERS Table 5",
"pathogenic_mutation": 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": [
"ecg_pattern",
"pathogenic_mutation"
],
"properties": {
"family": {
"enum": [
"relative_definite_brs",
"suspicious_scd",
"unexplained_scd_under_45",
"none"
],
"type": "string",
"description": "Highest Table 2 family-history item as assigned by the caller (Antzelevitch 2016). relative_definite_brs 2; suspicious_scd 1; unexplained_scd_under_45 0.5; none 0. Optional; omitted defaults to none. Award once (highest item only). magent does not take a pedigree."
},
"clinical": {
"enum": [
"vf_arrest",
"nocturnal_agonal",
"arrhythmic_syncope",
"unclear_syncope",
"af_under_30",
"none"
],
"type": "string",
"description": "Highest Table 2 clinical-history item as assigned by the caller (Antzelevitch 2016). vf_arrest 3; nocturnal_agonal 2; arrhythmic_syncope 2; unclear_syncope 1; af_under_30 0.5; none 0. Optional; omitted defaults to none. Award once (highest item only). magent does not take a history."
},
"ecg_pattern": {
"enum": [
"spontaneous_type1",
"fever_type1",
"drug_converted_type2_3"
],
"type": "string",
"description": "Highest Table 2 ECG finding as assigned by the caller (Antzelevitch 2016). spontaneous_type1 scores 3.5; fever_type1 scores 3; drug_converted_type2_3 scores 2. At least one ECG finding is required. Award once (highest item only). magent does not read tracings."
},
"pathogenic_mutation": {
"type": "boolean",
"description": "Probable pathogenic mutation in a BrS susceptibility gene (Antzelevitch 2016 Table 2 IV). true scores 0.5; false scores 0. magent does not interpret sequencing."
}
}
},
"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
- 2026-09-02 06:14Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 22:15Z
- 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. 7 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/shanghai, 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.