magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
TradingLiveeip155:8453Exactvia cdp
Rhmp-30Hip-fractureMortalityKatz-adlAlbumin
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 12:32Z
—
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/rhmp_30",
"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/rhmp_30",
"tags": [
"rhmp-30",
"hip-fracture",
"mortality",
"katz-adl",
"albumin"
],
"mimeType": "application/json",
"description": "de Jong 2025 Rotterdam Hip Fracture Mortality Prediction-30 Days (RHMP-30) LASSO logit from age, sex (published female coefficient, not race), albumin g/L, dementia, Katz-ADL total 0-6, ASA 4, and nursing-home residence. Returns logit and estimated_mortality_percent from the unrounded logit. Not an operative vs nonoperative order. magent does not assign ASA or Katz.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 80,
"sex": "female",
"asa_4": false,
"dementia": false,
"katz_adl": 6,
"albumin_g_l": 38,
"nursing_home": false
}
},
"output": {
"type": "json",
"example": {
"sex": "female",
"asa_4": false,
"logit": -3.45,
"formula": "rhmp_30",
"citation": {
"id": "de-jong-2025",
"doi": "10.2106/JBJS.23.01397",
"pmid": "39836737",
"title": "Multidimensional Approach for Predicting 30-Day Mortality in Patients with a Hip Fracture: Development and External Validation of the Rotterdam Hip Fracture Mortality Prediction-30 Days (RHMP-30)",
"source": "J Bone Joint Surg Am. 2025;107(5):459-468",
"authors": "de Jong L, de Haan E, van Rijckevorsel VAJIM, Kuijper TM, Roukema GR"
},
"dementia": false,
"katz_adl": 6,
"age_years": 80,
"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.",
"albumin_g_l": 38,
"nursing_home": false,
"formula_expression": "logit = -2.69 - 0.0442*albumin_g_l + 0.0306*age_years - 1.012*female + 0.360*dementia - 0.0853*katz_adl + 0.856*asa_4 + 0.726*nursing_home; estimated_mortality_percent = 100 * exp(logit)/(1+exp(logit)) from the unrounded logit, 2 decimals; displayed logit 2 decimals; female is 1 if sex is female else 0; dementia, asa_4, and nursing_home are 1 if true else 0; albumin is g/L (not g/dL); Katz-ADL total 0-6 (6 = independent)",
"estimated_mortality_percent": 3.09
}
},
"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",
"sex",
"albumin_g_l",
"dementia",
"katz_adl",
"asa_4",
"nursing_home"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 40-110. de Jong 2025 coefficient +0.0306 per year. magent does not read an identity document."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used as the published de Jong 2025 female coefficient (female = 1, male = 0). Not race. magent does not examine the patient."
},
"asa_4": {
"type": "boolean",
"description": "true if the caller assigns ASA physical status 4 (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not assign ASA class."
},
"dementia": {
"type": "boolean",
"description": "true if the caller assigns a history of dementia (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not diagnose dementia."
},
"katz_adl": {
"type": "integer",
"description": "Katz Index of Independence in Activities of Daily Living total, integer 0-6 (de Jong 2025). 0 = completely dependent; 6 = completely independent. Caller-assigned total; magent does not score bathing, dressing, toileting, transferring, continence, or feeding."
},
"albumin_g_l": {
"type": "number",
"description": "Admission serum albumin in g/L (10-60). de Jong 2025 Table I uses g/L (typical 30-45). Not g/dL. Caller-supplied; magent does not assay albumin."
},
"nursing_home": {
"type": "boolean",
"description": "true if the caller assigns residence in a nursing home (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not determine residence."
}
}
}
},
"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/rhmp_30",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 80,
"sex": "female",
"asa_4": false,
"dementia": false,
"katz_adl": 6,
"albumin_g_l": 38,
"nursing_home": false
},
{
"age": 80,
"sex": "female",
"asa_4": false,
"dementia": false,
"katz_adl": 6,
"albumin_g_l": 38,
"nursing_home": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/rhmp_30",
"count": 2,
"items": [
{
"sex": "female",
"asa_4": false,
"logit": -3.45,
"formula": "rhmp_30",
"citation": {
"id": "de-jong-2025",
"doi": "10.2106/JBJS.23.01397",
"pmid": "39836737",
"title": "Multidimensional Approach for Predicting 30-Day Mortality in Patients with a Hip Fracture: Development and External Validation of the Rotterdam Hip Fracture Mortality Prediction-30 Days (RHMP-30)",
"source": "J Bone Joint Surg Am. 2025;107(5):459-468",
"authors": "de Jong L, de Haan E, van Rijckevorsel VAJIM, Kuijper TM, Roukema GR"
},
"dementia": false,
"katz_adl": 6,
"age_years": 80,
"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.",
"albumin_g_l": 38,
"nursing_home": false,
"formula_expression": "logit = -2.69 - 0.0442*albumin_g_l + 0.0306*age_years - 1.012*female + 0.360*dementia - 0.0853*katz_adl + 0.856*asa_4 + 0.726*nursing_home; estimated_mortality_percent = 100 * exp(logit)/(1+exp(logit)) from the unrounded logit, 2 decimals; displayed logit 2 decimals; female is 1 if sex is female else 0; dementia, asa_4, and nursing_home are 1 if true else 0; albumin is g/L (not g/dL); Katz-ADL total 0-6 (6 = independent)",
"estimated_mortality_percent": 3.09
},
{
"sex": "female",
"asa_4": false,
"logit": -3.45,
"formula": "rhmp_30",
"citation": {
"id": "de-jong-2025",
"doi": "10.2106/JBJS.23.01397",
"pmid": "39836737",
"title": "Multidimensional Approach for Predicting 30-Day Mortality in Patients with a Hip Fracture: Development and External Validation of the Rotterdam Hip Fracture Mortality Prediction-30 Days (RHMP-30)",
"source": "J Bone Joint Surg Am. 2025;107(5):459-468",
"authors": "de Jong L, de Haan E, van Rijckevorsel VAJIM, Kuijper TM, Roukema GR"
},
"dementia": false,
"katz_adl": 6,
"age_years": 80,
"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.",
"albumin_g_l": 38,
"nursing_home": false,
"formula_expression": "logit = -2.69 - 0.0442*albumin_g_l + 0.0306*age_years - 1.012*female + 0.360*dementia - 0.0853*katz_adl + 0.856*asa_4 + 0.726*nursing_home; estimated_mortality_percent = 100 * exp(logit)/(1+exp(logit)) from the unrounded logit, 2 decimals; displayed logit 2 decimals; female is 1 if sex is female else 0; dementia, asa_4, and nursing_home are 1 if true else 0; albumin is g/L (not g/dL); Katz-ADL total 0-6 (6 = independent)",
"estimated_mortality_percent": 3.09
}
]
}
},
"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",
"sex",
"albumin_g_l",
"dementia",
"katz_adl",
"asa_4",
"nursing_home"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 40-110. de Jong 2025 coefficient +0.0306 per year. magent does not read an identity document."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used as the published de Jong 2025 female coefficient (female = 1, male = 0). Not race. magent does not examine the patient."
},
"asa_4": {
"type": "boolean",
"description": "true if the caller assigns ASA physical status 4 (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not assign ASA class."
},
"dementia": {
"type": "boolean",
"description": "true if the caller assigns a history of dementia (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not diagnose dementia."
},
"katz_adl": {
"type": "integer",
"description": "Katz Index of Independence in Activities of Daily Living total, integer 0-6 (de Jong 2025). 0 = completely dependent; 6 = completely independent. Caller-assigned total; magent does not score bathing, dressing, toileting, transferring, continence, or feeding."
},
"albumin_g_l": {
"type": "number",
"description": "Admission serum albumin in g/L (10-60). de Jong 2025 Table I uses g/L (typical 30-45). Not g/dL. Caller-supplied; magent does not assay albumin."
},
"nursing_home": {
"type": "boolean",
"description": "true if the caller assigns residence in a nursing home (de Jong 2025). true scores 1 in the logit; false scores 0. magent does not determine residence."
}
}
},
"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 12:32Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 11:15Z
- 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. 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/rhmp_30, 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.