magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
Pecarn-cspinePediatricC-spineEmergencyTrauma
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 13:22Z
—
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/pecarn_cspine",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
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{
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"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://api.magentlab.com/api/calc/pecarn_cspine",
"tags": [
"pecarn-cspine",
"pediatric",
"c-spine",
"emergency",
"trauma"
],
"mimeType": "application/json",
"description": "PECARN pediatric C-spine (Leonard 2024). No age split. High (consider CT) if GCS 3-8 or AVPU U; abnormal airway, breathing, or circulation; or focal neurologic deficit. Else intermediate (consider x-rays) if neck pain; AMS GCS 9-14; substantial head or torso injury; or midline neck tenderness. Else low (consider clinical clearance). High-risk beats intermediate. Not NEXUS, Canadian C-spine, PECARN head, or PECARN IAI. Not a medical device. magent does not examine the patient.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"neck_pain": false,
"gcs_3_to_8_or_avpu_u": false,
"midline_neck_tenderness": false,
"substantial_head_injury": false,
"focal_neurologic_deficit": false,
"substantial_torso_injury": false,
"altered_mental_status_gcs_9_to_14": false,
"abnormal_airway_breathing_or_circulation": false
}
},
"output": {
"type": "json",
"example": {
"formula": "pecarn_cspine",
"citation": {
"id": "leonard-2024",
"doi": "10.1016/S2352-4642(24)00104-4",
"pmid": "38843852",
"title": "PECARN prediction rule for cervical spine imaging of children presenting to the emergency department with blunt trauma: a multicentre prospective observational study",
"source": "Lancet Child Adolesc Health. 2024;8(7):482-490",
"authors": "Leonard JC, Harding M, Cook LJ, et al."
},
"criteria": [
{
"met": false,
"factor": "gcs_3_to_8_or_avpu_u"
},
{
"met": false,
"factor": "abnormal_airway_breathing_or_circulation"
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{
"met": false,
"factor": "focal_neurologic_deficit"
},
{
"met": false,
"factor": "neck_pain"
},
{
"met": false,
"factor": "altered_mental_status_gcs_9_to_14"
},
{
"met": false,
"factor": "substantial_head_injury"
},
{
"met": false,
"factor": "substantial_torso_injury"
},
{
"met": false,
"factor": "midline_neck_tenderness"
}
],
"risk_tier": "low",
"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.",
"consider_ct": false,
"consider_xray": false,
"formula_expression": "high if any high-risk factor (gcs_3_to_8_or_avpu_u, abnormal_airway_breathing_or_circulation, or focal_neurologic_deficit), else intermediate if any CART non-negligible factor (neck_pain, altered_mental_status_gcs_9_to_14, substantial_head_injury, substantial_torso_injury, or midline_neck_tenderness), else low; high-risk beats intermediate; no age split (Leonard 2024)",
"consider_clinical_clearance": true
}
},
"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": [
"gcs_3_to_8_or_avpu_u",
"abnormal_airway_breathing_or_circulation",
"focal_neurologic_deficit",
"neck_pain",
"altered_mental_status_gcs_9_to_14",
"substantial_head_injury",
"substantial_torso_injury",
"midline_neck_tenderness"
],
"properties": {
"neck_pain": {
"type": "boolean",
"description": "Self-reported neck pain as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. Consider x-rays when any intermediate factor is true and no high-risk factor is true. magent does not take a pain score."
},
"gcs_3_to_8_or_avpu_u": {
"type": "boolean",
"description": "GCS 3-8 or AVPU = U as assigned by the caller (Leonard 2024 high-risk; paper: factors associated with >10% CSI). true or false. High-risk; consider CT when any high-risk factor is true. This is not the intermediate GCS 9-14 / AVPU V or P / other AMS flag. magent does not take a GCS integer or AVPU letter."
},
"midline_neck_tenderness": {
"type": "boolean",
"description": "Midline neck tenderness as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. magent does not palpate the neck."
},
"substantial_head_injury": {
"type": "boolean",
"description": "Substantial head injury as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). Paper: injuries warranting inpatient observation or surgical intervention (example: skull fracture). true or false. Caller assigns the boolean; magent does not interpret imaging."
},
"focal_neurologic_deficit": {
"type": "boolean",
"description": "Focal neurologic deficit (paresthesia, numbness, or weakness) as assigned by the caller (Leonard 2024 high-risk). true or false. High-risk; consider CT when any high-risk factor is true. magent does not examine the patient."
},
"substantial_torso_injury": {
"type": "boolean",
"description": "Substantial torso injury as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). Paper: injuries warranting inpatient observation or surgical intervention (examples: pneumothorax; solid-organ injury; T/L/S spine fracture; pelvic fracture). true or false. Caller assigns the boolean; magent does not interpret imaging."
},
"altered_mental_status_gcs_9_to_14": {
"type": "boolean",
"description": "Altered mental status as GCS 9-14, AVPU V or P, or other AMS (not the high-risk U / GCS 3-8 flag) as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. magent does not take a GCS integer or AVPU letter."
},
"abnormal_airway_breathing_or_circulation": {
"type": "boolean",
"description": "Abnormal airway, breathing, or circulation as assigned by the caller (Leonard 2024 high-risk). true or false. High-risk; consider CT when any high-risk factor is true. magent does not examine airway, breathing, or circulation."
}
}
}
},
"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/pecarn_cspine",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"neck_pain": false,
"gcs_3_to_8_or_avpu_u": false,
"midline_neck_tenderness": false,
"substantial_head_injury": false,
"focal_neurologic_deficit": false,
"substantial_torso_injury": false,
"altered_mental_status_gcs_9_to_14": false,
"abnormal_airway_breathing_or_circulation": false
},
{
"neck_pain": false,
"gcs_3_to_8_or_avpu_u": false,
"midline_neck_tenderness": false,
"substantial_head_injury": false,
"focal_neurologic_deficit": false,
"substantial_torso_injury": false,
"altered_mental_status_gcs_9_to_14": false,
"abnormal_airway_breathing_or_circulation": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/pecarn_cspine",
"count": 2,
"items": [
{
"formula": "pecarn_cspine",
"citation": {
"id": "leonard-2024",
"doi": "10.1016/S2352-4642(24)00104-4",
"pmid": "38843852",
"title": "PECARN prediction rule for cervical spine imaging of children presenting to the emergency department with blunt trauma: a multicentre prospective observational study",
"source": "Lancet Child Adolesc Health. 2024;8(7):482-490",
"authors": "Leonard JC, Harding M, Cook LJ, et al."
},
"criteria": [
{
"met": false,
"factor": "gcs_3_to_8_or_avpu_u"
},
{
"met": false,
"factor": "abnormal_airway_breathing_or_circulation"
},
{
"met": false,
"factor": "focal_neurologic_deficit"
},
{
"met": false,
"factor": "neck_pain"
},
{
"met": false,
"factor": "altered_mental_status_gcs_9_to_14"
},
{
"met": false,
"factor": "substantial_head_injury"
},
{
"met": false,
"factor": "substantial_torso_injury"
},
{
"met": false,
"factor": "midline_neck_tenderness"
}
],
"risk_tier": "low",
"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.",
"consider_ct": false,
"consider_xray": false,
"formula_expression": "high if any high-risk factor (gcs_3_to_8_or_avpu_u, abnormal_airway_breathing_or_circulation, or focal_neurologic_deficit), else intermediate if any CART non-negligible factor (neck_pain, altered_mental_status_gcs_9_to_14, substantial_head_injury, substantial_torso_injury, or midline_neck_tenderness), else low; high-risk beats intermediate; no age split (Leonard 2024)",
"consider_clinical_clearance": true
},
{
"formula": "pecarn_cspine",
"citation": {
"id": "leonard-2024",
"doi": "10.1016/S2352-4642(24)00104-4",
"pmid": "38843852",
"title": "PECARN prediction rule for cervical spine imaging of children presenting to the emergency department with blunt trauma: a multicentre prospective observational study",
"source": "Lancet Child Adolesc Health. 2024;8(7):482-490",
"authors": "Leonard JC, Harding M, Cook LJ, et al."
},
"criteria": [
{
"met": false,
"factor": "gcs_3_to_8_or_avpu_u"
},
{
"met": false,
"factor": "abnormal_airway_breathing_or_circulation"
},
{
"met": false,
"factor": "focal_neurologic_deficit"
},
{
"met": false,
"factor": "neck_pain"
},
{
"met": false,
"factor": "altered_mental_status_gcs_9_to_14"
},
{
"met": false,
"factor": "substantial_head_injury"
},
{
"met": false,
"factor": "substantial_torso_injury"
},
{
"met": false,
"factor": "midline_neck_tenderness"
}
],
"risk_tier": "low",
"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.",
"consider_ct": false,
"consider_xray": false,
"formula_expression": "high if any high-risk factor (gcs_3_to_8_or_avpu_u, abnormal_airway_breathing_or_circulation, or focal_neurologic_deficit), else intermediate if any CART non-negligible factor (neck_pain, altered_mental_status_gcs_9_to_14, substantial_head_injury, substantial_torso_injury, or midline_neck_tenderness), else low; high-risk beats intermediate; no age split (Leonard 2024)",
"consider_clinical_clearance": true
}
]
}
},
"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": [
"gcs_3_to_8_or_avpu_u",
"abnormal_airway_breathing_or_circulation",
"focal_neurologic_deficit",
"neck_pain",
"altered_mental_status_gcs_9_to_14",
"substantial_head_injury",
"substantial_torso_injury",
"midline_neck_tenderness"
],
"properties": {
"neck_pain": {
"type": "boolean",
"description": "Self-reported neck pain as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. Consider x-rays when any intermediate factor is true and no high-risk factor is true. magent does not take a pain score."
},
"gcs_3_to_8_or_avpu_u": {
"type": "boolean",
"description": "GCS 3-8 or AVPU = U as assigned by the caller (Leonard 2024 high-risk; paper: factors associated with >10% CSI). true or false. High-risk; consider CT when any high-risk factor is true. This is not the intermediate GCS 9-14 / AVPU V or P / other AMS flag. magent does not take a GCS integer or AVPU letter."
},
"midline_neck_tenderness": {
"type": "boolean",
"description": "Midline neck tenderness as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. magent does not palpate the neck."
},
"substantial_head_injury": {
"type": "boolean",
"description": "Substantial head injury as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). Paper: injuries warranting inpatient observation or surgical intervention (example: skull fracture). true or false. Caller assigns the boolean; magent does not interpret imaging."
},
"focal_neurologic_deficit": {
"type": "boolean",
"description": "Focal neurologic deficit (paresthesia, numbness, or weakness) as assigned by the caller (Leonard 2024 high-risk). true or false. High-risk; consider CT when any high-risk factor is true. magent does not examine the patient."
},
"substantial_torso_injury": {
"type": "boolean",
"description": "Substantial torso injury as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). Paper: injuries warranting inpatient observation or surgical intervention (examples: pneumothorax; solid-organ injury; T/L/S spine fracture; pelvic fracture). true or false. Caller assigns the boolean; magent does not interpret imaging."
},
"altered_mental_status_gcs_9_to_14": {
"type": "boolean",
"description": "Altered mental status as GCS 9-14, AVPU V or P, or other AMS (not the high-risk U / GCS 3-8 flag) as assigned by the caller (Leonard 2024 CART non-negligible / intermediate). true or false. magent does not take a GCS integer or AVPU letter."
},
"abnormal_airway_breathing_or_circulation": {
"type": "boolean",
"description": "Abnormal airway, breathing, or circulation as assigned by the caller (Leonard 2024 high-risk). true or false. High-risk; consider CT when any high-risk factor is true. magent does not examine airway, breathing, or circulation."
}
}
},
"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 13:22Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 21:16Z
- 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/pecarn_cspine, 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.