magent
Battle 2014 STUMBL integer score after blunt chest wall trauma: 1 point per decade of age starting at 10, 3 per rib fracture, 5 for chronic lung disease, 4 for preinjury anticoagulants, and 2 per 5% SpO2 decrease starting at 94%. Table 5 complication probabilities 13/29/52/70/80/88%. magent does not examine the chest or count ribs. Not a medical device, not a disposition or ICU order.
Searchofflineeip155:8453Exactvia cdp
StumblChest-traumaRib-fractureEmergency
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 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 13:28Z
—
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/stumbl",
"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/stumbl",
"tags": [
"stumbl",
"chest-trauma",
"rib-fracture",
"emergency"
],
"mimeType": "application/json",
"description": "Battle 2014 STUMBL integer score after blunt chest wall trauma: 1 point per decade of age starting at 10, 3 per rib fracture, 5 for chronic lung disease, 4 for preinjury anticoagulants, and 2 per 5% SpO2 decrease starting at 94%. Table 5 complication probabilities 13/29/52/70/80/88%. magent does not examine the chest or count ribs. Not a medical device, not a disposition or ICU order.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 67,
"rib_count": 3,
"spo2_percent": 87,
"chronic_lung_disease": true,
"preinjury_anticoagulants": false
}
},
"output": {
"type": "json",
"example": {
"score": 24,
"formula": "stumbl",
"citation": {
"id": "battle-2014",
"doi": "10.1186/cc13873",
"pmid": "24887537",
"title": "Predicting outcomes after blunt chest wall trauma: development and external validation of a new prognostic model",
"source": "Crit Care. 2014;18(3):R98",
"authors": "Battle CE, Hutchings H, Lovett S, Bouamra O, Jones S, Sen A, Gagg J, Robinson D, Hartford-Beynon J, Williams J, Evans A"
},
"age_years": 67,
"rib_count": 3,
"components": [
{
"value": 67,
"factor": "age",
"points": 6,
"present": true
},
{
"value": 3,
"factor": "rib_count",
"points": 9,
"present": true
},
{
"factor": "chronic_lung_disease",
"points": 5,
"present": true
},
{
"factor": "preinjury_anticoagulants",
"points": 0,
"present": false
},
{
"value": 87,
"factor": "spo2_percent",
"points": 4,
"present": true
}
],
"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.",
"stumbl_band": "band_21_25",
"spo2_percent": 87,
"formula_expression": "STUMBL = div(age, 10) + 3*rib_count + chronic_lung_disease 5 + preinjury_anticoagulants 4 + spo2 (>=95 0 else 2*(1+div(94-spo2_percent, 5))); Battle 2014 Table 4; Table 5 0-10 13%, 11-15 29%, 16-20 52%, 21-25 70%, 26-30 80%, 31+ 88%",
"chronic_lung_disease": true,
"icu_admission_cutoff": false,
"preinjury_anticoagulants": false,
"at_risk_for_complications": true,
"complication_probability_percent": 70
}
},
"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",
"rib_count",
"chronic_lung_disease",
"preinjury_anticoagulants",
"spo2_percent"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 1–120. Battle 2014 Table 4: 1 point per additional 10-year increase starting at 10 (div(age, 10); age 10 scores 1, age 67 scores 6, age 1–9 scores 0). Not the adult 18–120 clamp."
},
"rib_count": {
"type": "integer",
"description": "Caller-assigned number of rib fractures, integer 0–24. Battle 2014 Table 4: 3 points per additional rib fracture (3 ribs scores 9). magent does not examine the chest or count ribs."
},
"spo2_percent": {
"type": "integer",
"description": "Oxygen saturation percent, integer 50–100. Battle 2014 Table 4 footnote c: 2 points per 5% decrease starting at 94% (≥95 scores 0; else 2*(1+div(94-spo2_percent, 5)); 87% scores 4). magent does not measure SpO2."
},
"chronic_lung_disease": {
"type": "boolean",
"description": "Pre-injury chronic lung disease as assigned by the caller (Battle 2014 Table 4). true or false. true scores 5."
},
"preinjury_anticoagulants": {
"type": "boolean",
"description": "Pre-injury anticoagulant use as assigned by the caller (Battle 2014 Table 4). true or false. true scores 4."
}
}
}
},
"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/stumbl",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 67,
"rib_count": 3,
"spo2_percent": 87,
"chronic_lung_disease": true,
"preinjury_anticoagulants": false
},
{
"age": 67,
"rib_count": 3,
"spo2_percent": 87,
"chronic_lung_disease": true,
"preinjury_anticoagulants": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/stumbl",
"count": 2,
"items": [
{
"score": 24,
"formula": "stumbl",
"citation": {
"id": "battle-2014",
"doi": "10.1186/cc13873",
"pmid": "24887537",
"title": "Predicting outcomes after blunt chest wall trauma: development and external validation of a new prognostic model",
"source": "Crit Care. 2014;18(3):R98",
"authors": "Battle CE, Hutchings H, Lovett S, Bouamra O, Jones S, Sen A, Gagg J, Robinson D, Hartford-Beynon J, Williams J, Evans A"
},
"age_years": 67,
"rib_count": 3,
"components": [
{
"value": 67,
"factor": "age",
"points": 6,
"present": true
},
{
"value": 3,
"factor": "rib_count",
"points": 9,
"present": true
},
{
"factor": "chronic_lung_disease",
"points": 5,
"present": true
},
{
"factor": "preinjury_anticoagulants",
"points": 0,
"present": false
},
{
"value": 87,
"factor": "spo2_percent",
"points": 4,
"present": true
}
],
"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.",
"stumbl_band": "band_21_25",
"spo2_percent": 87,
"formula_expression": "STUMBL = div(age, 10) + 3*rib_count + chronic_lung_disease 5 + preinjury_anticoagulants 4 + spo2 (>=95 0 else 2*(1+div(94-spo2_percent, 5))); Battle 2014 Table 4; Table 5 0-10 13%, 11-15 29%, 16-20 52%, 21-25 70%, 26-30 80%, 31+ 88%",
"chronic_lung_disease": true,
"icu_admission_cutoff": false,
"preinjury_anticoagulants": false,
"at_risk_for_complications": true,
"complication_probability_percent": 70
},
{
"score": 24,
"formula": "stumbl",
"citation": {
"id": "battle-2014",
"doi": "10.1186/cc13873",
"pmid": "24887537",
"title": "Predicting outcomes after blunt chest wall trauma: development and external validation of a new prognostic model",
"source": "Crit Care. 2014;18(3):R98",
"authors": "Battle CE, Hutchings H, Lovett S, Bouamra O, Jones S, Sen A, Gagg J, Robinson D, Hartford-Beynon J, Williams J, Evans A"
},
"age_years": 67,
"rib_count": 3,
"components": [
{
"value": 67,
"factor": "age",
"points": 6,
"present": true
},
{
"value": 3,
"factor": "rib_count",
"points": 9,
"present": true
},
{
"factor": "chronic_lung_disease",
"points": 5,
"present": true
},
{
"factor": "preinjury_anticoagulants",
"points": 0,
"present": false
},
{
"value": 87,
"factor": "spo2_percent",
"points": 4,
"present": true
}
],
"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.",
"stumbl_band": "band_21_25",
"spo2_percent": 87,
"formula_expression": "STUMBL = div(age, 10) + 3*rib_count + chronic_lung_disease 5 + preinjury_anticoagulants 4 + spo2 (>=95 0 else 2*(1+div(94-spo2_percent, 5))); Battle 2014 Table 4; Table 5 0-10 13%, 11-15 29%, 16-20 52%, 21-25 70%, 26-30 80%, 31+ 88%",
"chronic_lung_disease": true,
"icu_admission_cutoff": false,
"preinjury_anticoagulants": false,
"at_risk_for_complications": true,
"complication_probability_percent": 70
}
]
}
},
"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",
"rib_count",
"chronic_lung_disease",
"preinjury_anticoagulants",
"spo2_percent"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 1–120. Battle 2014 Table 4: 1 point per additional 10-year increase starting at 10 (div(age, 10); age 10 scores 1, age 67 scores 6, age 1–9 scores 0). Not the adult 18–120 clamp."
},
"rib_count": {
"type": "integer",
"description": "Caller-assigned number of rib fractures, integer 0–24. Battle 2014 Table 4: 3 points per additional rib fracture (3 ribs scores 9). magent does not examine the chest or count ribs."
},
"spo2_percent": {
"type": "integer",
"description": "Oxygen saturation percent, integer 50–100. Battle 2014 Table 4 footnote c: 2 points per 5% decrease starting at 94% (≥95 scores 0; else 2*(1+div(94-spo2_percent, 5)); 87% scores 4). magent does not measure SpO2."
},
"chronic_lung_disease": {
"type": "boolean",
"description": "Pre-injury chronic lung disease as assigned by the caller (Battle 2014 Table 4). true or false. true scores 5."
},
"preinjury_anticoagulants": {
"type": "boolean",
"description": "Pre-injury anticoagulant use as assigned by the caller (Battle 2014 Table 4). true or false. true scores 4."
}
}
},
"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 13:28Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 06:15Z
- 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. 13 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/stumbl, 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.