magent
Thiruganasambandamoorthy 2016 Canadian Syncope Risk Score: vasovagal predisposition −1, heart disease +1, any ED SBP <90 or >180 +2, troponin above the 99th percentile +2, QRS axis < −30° or >100° +1, QRS duration >130 ms +1, QTc >480 ms +2, ED vasovagal diagnosis −2, ED cardiac diagnosis +2. Score −3 to 11. Caller assigns flags and ECG numbers. Not a medical device, not a syncope diagnosis, and not a disposition protocol.
DataLiveeip155:8453Exactvia cdp
CsrsSyncopeEmergencyEcgCalculator
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 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.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:32Z
—
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/csrs",
"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/csrs",
"tags": [
"csrs",
"syncope",
"emergency",
"ecg",
"calculator"
],
"mimeType": "application/json",
"description": "Thiruganasambandamoorthy 2016 Canadian Syncope Risk Score: vasovagal predisposition −1, heart disease +1, any ED SBP <90 or >180 +2, troponin above the 99th percentile +2, QRS axis < −30° or >100° +1, QRS duration >130 ms +1, QTc >480 ms +2, ED vasovagal diagnosis −2, ED cardiac diagnosis +2. Score −3 to 11. Caller assigns flags and ECG numbers. Not a medical device, not a syncope diagnosis, and not a disposition protocol.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"qtc_ms": 400,
"qrs_axis_deg": 0,
"heart_disease": false,
"qrs_duration_ms": 80,
"elevated_troponin": false,
"ed_cardiac_syncope": false,
"sbp_lt_90_or_gt_180": false,
"ed_vasovagal_syncope": false,
"predisposition_vasovagal": false
}
},
"output": {
"type": "json",
"example": {
"score": 0,
"qtc_ms": 400,
"formula": "csrs",
"citation": {
"id": "thiruganasambandamoorthy-2016",
"doi": "10.1503/cmaj.151469",
"pmid": "27378464",
"title": "Development of the Canadian Syncope Risk Score to predict serious adverse events after emergency department assessment of syncope.",
"source": "CMAJ. 2016;188(12):E289-E298",
"authors": "Thiruganasambandamoorthy V, Kwong K, Wells GA, et al."
},
"max_score": 11,
"components": [
{
"factor": "predisposition_vasovagal",
"points": 0,
"present": false
},
{
"factor": "heart_disease",
"points": 0,
"present": false
},
{
"factor": "sbp_lt_90_or_gt_180",
"points": 0,
"present": false
},
{
"factor": "elevated_troponin",
"points": 0,
"present": false
},
{
"value": 0,
"factor": "qrs_axis",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "qrs_duration",
"points": 0,
"present": false
},
{
"value": 400,
"factor": "qtc",
"points": 0,
"present": false
},
{
"factor": "ed_vasovagal_syncope",
"points": 0,
"present": false
},
{
"factor": "ed_cardiac_syncope",
"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.",
"qrs_axis_deg": 0,
"qrs_duration_ms": 80,
"formula_expression": "CSRS = predisposition_vasovagal(-1) + heart_disease(1) + sbp_lt_90_or_gt_180(2) + elevated_troponin(2) + (qrs_axis < -30 or > 100)(1) + (qrs_duration > 130)(1) + (qtc > 480)(2) + ed_vasovagal_syncope(-2) + ed_cardiac_syncope(2); range -3 to 11; max 11; Figure 2 / abstract (axis >100, not table 110)"
}
},
"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": [
"predisposition_vasovagal",
"heart_disease",
"sbp_lt_90_or_gt_180",
"elevated_troponin",
"qrs_axis_deg",
"qrs_duration_ms",
"qtc_ms",
"ed_vasovagal_syncope",
"ed_cardiac_syncope"
],
"properties": {
"qtc_ms": {
"type": "number",
"description": "QTc in milliseconds (200-800). Scores 2 when >480. 480 does not score; 481 does."
},
"qrs_axis_deg": {
"type": "number",
"description": "QRS axis in degrees (-180 to 180). Scores 1 when < -30 or > 100 (Figure 2 / abstract; not table 110). -30 and 100 do not score; -31 and 101 do."
},
"heart_disease": {
"type": "boolean",
"description": "History of heart disease (Thiruganasambandamoorthy 2016). true or false. Scores 1 if true."
},
"qrs_duration_ms": {
"type": "number",
"description": "QRS duration in milliseconds (40-300). Scores 1 when >130. 130 does not score; 131 does."
},
"elevated_troponin": {
"type": "boolean",
"description": "Troponin above the 99th percentile (Thiruganasambandamoorthy 2016). true or false. Scores 2 if true."
},
"ed_cardiac_syncope": {
"type": "boolean",
"description": "ED diagnosis of cardiac syncope (Thiruganasambandamoorthy 2016). true or false. Scores 2 if true. Cannot be true together with ed_vasovagal_syncope."
},
"sbp_lt_90_or_gt_180": {
"type": "boolean",
"description": "Any ED systolic BP <90 or >180 mm Hg (caller-assigned; SBP 90 and 180 are not out of range). true or false. Scores 2 if true. magent does not take a numeric SBP."
},
"ed_vasovagal_syncope": {
"type": "boolean",
"description": "ED diagnosis of vasovagal syncope (Thiruganasambandamoorthy 2016). true or false. Scores -2 if true. Cannot be true together with ed_cardiac_syncope."
},
"predisposition_vasovagal": {
"type": "boolean",
"description": "Predisposition to vasovagal syncope (Thiruganasambandamoorthy 2016). true or false. Scores -1 if true."
}
}
}
},
"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/csrs",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"qtc_ms": 400,
"qrs_axis_deg": 0,
"heart_disease": false,
"qrs_duration_ms": 80,
"elevated_troponin": false,
"ed_cardiac_syncope": false,
"sbp_lt_90_or_gt_180": false,
"ed_vasovagal_syncope": false,
"predisposition_vasovagal": false
},
{
"qtc_ms": 400,
"qrs_axis_deg": 0,
"heart_disease": false,
"qrs_duration_ms": 80,
"elevated_troponin": false,
"ed_cardiac_syncope": false,
"sbp_lt_90_or_gt_180": false,
"ed_vasovagal_syncope": false,
"predisposition_vasovagal": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/csrs",
"count": 2,
"items": [
{
"score": 0,
"qtc_ms": 400,
"formula": "csrs",
"citation": {
"id": "thiruganasambandamoorthy-2016",
"doi": "10.1503/cmaj.151469",
"pmid": "27378464",
"title": "Development of the Canadian Syncope Risk Score to predict serious adverse events after emergency department assessment of syncope.",
"source": "CMAJ. 2016;188(12):E289-E298",
"authors": "Thiruganasambandamoorthy V, Kwong K, Wells GA, et al."
},
"max_score": 11,
"components": [
{
"factor": "predisposition_vasovagal",
"points": 0,
"present": false
},
{
"factor": "heart_disease",
"points": 0,
"present": false
},
{
"factor": "sbp_lt_90_or_gt_180",
"points": 0,
"present": false
},
{
"factor": "elevated_troponin",
"points": 0,
"present": false
},
{
"value": 0,
"factor": "qrs_axis",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "qrs_duration",
"points": 0,
"present": false
},
{
"value": 400,
"factor": "qtc",
"points": 0,
"present": false
},
{
"factor": "ed_vasovagal_syncope",
"points": 0,
"present": false
},
{
"factor": "ed_cardiac_syncope",
"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.",
"qrs_axis_deg": 0,
"qrs_duration_ms": 80,
"formula_expression": "CSRS = predisposition_vasovagal(-1) + heart_disease(1) + sbp_lt_90_or_gt_180(2) + elevated_troponin(2) + (qrs_axis < -30 or > 100)(1) + (qrs_duration > 130)(1) + (qtc > 480)(2) + ed_vasovagal_syncope(-2) + ed_cardiac_syncope(2); range -3 to 11; max 11; Figure 2 / abstract (axis >100, not table 110)"
},
{
"score": 0,
"qtc_ms": 400,
"formula": "csrs",
"citation": {
"id": "thiruganasambandamoorthy-2016",
"doi": "10.1503/cmaj.151469",
"pmid": "27378464",
"title": "Development of the Canadian Syncope Risk Score to predict serious adverse events after emergency department assessment of syncope.",
"source": "CMAJ. 2016;188(12):E289-E298",
"authors": "Thiruganasambandamoorthy V, Kwong K, Wells GA, et al."
},
"max_score": 11,
"components": [
{
"factor": "predisposition_vasovagal",
"points": 0,
"present": false
},
{
"factor": "heart_disease",
"points": 0,
"present": false
},
{
"factor": "sbp_lt_90_or_gt_180",
"points": 0,
"present": false
},
{
"factor": "elevated_troponin",
"points": 0,
"present": false
},
{
"value": 0,
"factor": "qrs_axis",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "qrs_duration",
"points": 0,
"present": false
},
{
"value": 400,
"factor": "qtc",
"points": 0,
"present": false
},
{
"factor": "ed_vasovagal_syncope",
"points": 0,
"present": false
},
{
"factor": "ed_cardiac_syncope",
"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.",
"qrs_axis_deg": 0,
"qrs_duration_ms": 80,
"formula_expression": "CSRS = predisposition_vasovagal(-1) + heart_disease(1) + sbp_lt_90_or_gt_180(2) + elevated_troponin(2) + (qrs_axis < -30 or > 100)(1) + (qrs_duration > 130)(1) + (qtc > 480)(2) + ed_vasovagal_syncope(-2) + ed_cardiac_syncope(2); range -3 to 11; max 11; Figure 2 / abstract (axis >100, not table 110)"
}
]
}
},
"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": [
"predisposition_vasovagal",
"heart_disease",
"sbp_lt_90_or_gt_180",
"elevated_troponin",
"qrs_axis_deg",
"qrs_duration_ms",
"qtc_ms",
"ed_vasovagal_syncope",
"ed_cardiac_syncope"
],
"properties": {
"qtc_ms": {
"type": "number",
"description": "QTc in milliseconds (200-800). Scores 2 when >480. 480 does not score; 481 does."
},
"qrs_axis_deg": {
"type": "number",
"description": "QRS axis in degrees (-180 to 180). Scores 1 when < -30 or > 100 (Figure 2 / abstract; not table 110). -30 and 100 do not score; -31 and 101 do."
},
"heart_disease": {
"type": "boolean",
"description": "History of heart disease (Thiruganasambandamoorthy 2016). true or false. Scores 1 if true."
},
"qrs_duration_ms": {
"type": "number",
"description": "QRS duration in milliseconds (40-300). Scores 1 when >130. 130 does not score; 131 does."
},
"elevated_troponin": {
"type": "boolean",
"description": "Troponin above the 99th percentile (Thiruganasambandamoorthy 2016). true or false. Scores 2 if true."
},
"ed_cardiac_syncope": {
"type": "boolean",
"description": "ED diagnosis of cardiac syncope (Thiruganasambandamoorthy 2016). true or false. Scores 2 if true. Cannot be true together with ed_vasovagal_syncope."
},
"sbp_lt_90_or_gt_180": {
"type": "boolean",
"description": "Any ED systolic BP <90 or >180 mm Hg (caller-assigned; SBP 90 and 180 are not out of range). true or false. Scores 2 if true. magent does not take a numeric SBP."
},
"ed_vasovagal_syncope": {
"type": "boolean",
"description": "ED diagnosis of vasovagal syncope (Thiruganasambandamoorthy 2016). true or false. Scores -2 if true. Cannot be true together with ed_cardiac_syncope."
},
"predisposition_vasovagal": {
"type": "boolean",
"description": "Predisposition to vasovagal syncope (Thiruganasambandamoorthy 2016). true or false. Scores -1 if true."
}
}
},
"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 13:32Z
- 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. 15 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/csrs, 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.