magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
TradingLiveeip155:8453Exactvia cdp
HopeHypothermiaCardiac-arrestEclsCalculator
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 11:46Z
—
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/hope",
"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/hope",
"tags": [
"hope",
"hypothermia",
"cardiac-arrest",
"ecls",
"calculator"
],
"mimeType": "application/json",
"description": "Pasquier 2018 HOPE survival probability after ECLS for hypothermic cardiac arrest from sex (published male coefficient, not race), asphyxia, age, potassium, CPR duration, and temperature. Returns logit, estimated_survival_percent from the unrounded logit, and Table 2 HOPE >= 10% flag. Not an ECLS or rewarming order. magent does not cannulate.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 40,
"sex": "female",
"asphyxia": false,
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4
}
},
"output": {
"type": "json",
"example": {
"sex": "female",
"logit": 1.6,
"formula": "hope",
"asphyxia": false,
"citation": {
"id": "pasquier-2018",
"doi": "10.1016/j.resuscitation.2018.02.026",
"pmid": "29481910",
"title": "Hypothermia outcome prediction after extracorporeal life support for hypothermic cardiac arrest patients: The HOPE score",
"source": "Resuscitation. 2018;126:58-64",
"authors": "Pasquier M, Hugli O, Paal P, Darocha T, Blancher M, Husby P, Silfvast T, Carron PN, Rousson V"
},
"age_years": 40,
"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.",
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4,
"formula_expression": "logit = 2.44 - 1.55*male - 1.95*asphyxia - 0.0191*age - 2.07*log2(potassium_mmol_l) - 0.573*log2(cpr_duration_min) + 0.937*temperature_c - 0.0247*temperature_c^2; survival_probability = exp(logit)/(1+exp(logit)); estimated_survival_percent = 100 * survival_probability from the unrounded logit, 2 decimals; male is 1 if sex is male else 0; asphyxia is 1 if asphyxia-related (head fully covered by water or snow AND cardiac arrest at extrication) else 0; hope_ge_10_percent is true when survival_probability >= 0.10 (Pasquier 2018 Table 2)",
"hope_ge_10_percent": true,
"estimated_survival_percent": 83.14
}
},
"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",
"asphyxia",
"cpr_duration_min",
"potassium_mmol_l",
"temperature_c"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 0-100. Pasquier 2018 coefficient -0.0191 per year. magent does not read an identity document."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used as the published Pasquier 2018 male coefficient (male = 1, female = 0). Not race. magent does not examine the patient."
},
"asphyxia": {
"type": "boolean",
"description": "true if the caller assigns an asphyxia-related mechanism: head fully covered by water or snow AND cardiac arrest at extrication (Pasquier 2018). true scores 1 in the logit; false scores 0. magent does not classify the scene."
},
"temperature_c": {
"type": "number",
"description": "Core temperature in C (10-37). Linear and squared Pasquier 2018 terms. Caller-supplied; magent does not measure temperature or convert Fahrenheit."
},
"cpr_duration_min": {
"type": "number",
"description": "Duration of CPR in minutes from start of CPR to ECLS (1-480). Enters as log2. Must be greater than 0 (0 is invalid). Caller-supplied; magent does not time the arrest."
},
"potassium_mmol_l": {
"type": "number",
"description": "Serum potassium in mmol/L (0.5-20). Enters as log2. Must be greater than 0. Caller-supplied; magent does not assay potassium."
}
}
}
},
"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/hope",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 40,
"sex": "female",
"asphyxia": false,
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4
},
{
"age": 40,
"sex": "female",
"asphyxia": false,
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/hope",
"count": 2,
"items": [
{
"sex": "female",
"logit": 1.6,
"formula": "hope",
"asphyxia": false,
"citation": {
"id": "pasquier-2018",
"doi": "10.1016/j.resuscitation.2018.02.026",
"pmid": "29481910",
"title": "Hypothermia outcome prediction after extracorporeal life support for hypothermic cardiac arrest patients: The HOPE score",
"source": "Resuscitation. 2018;126:58-64",
"authors": "Pasquier M, Hugli O, Paal P, Darocha T, Blancher M, Husby P, Silfvast T, Carron PN, Rousson V"
},
"age_years": 40,
"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.",
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4,
"formula_expression": "logit = 2.44 - 1.55*male - 1.95*asphyxia - 0.0191*age - 2.07*log2(potassium_mmol_l) - 0.573*log2(cpr_duration_min) + 0.937*temperature_c - 0.0247*temperature_c^2; survival_probability = exp(logit)/(1+exp(logit)); estimated_survival_percent = 100 * survival_probability from the unrounded logit, 2 decimals; male is 1 if sex is male else 0; asphyxia is 1 if asphyxia-related (head fully covered by water or snow AND cardiac arrest at extrication) else 0; hope_ge_10_percent is true when survival_probability >= 0.10 (Pasquier 2018 Table 2)",
"hope_ge_10_percent": true,
"estimated_survival_percent": 83.14
},
{
"sex": "female",
"logit": 1.6,
"formula": "hope",
"asphyxia": false,
"citation": {
"id": "pasquier-2018",
"doi": "10.1016/j.resuscitation.2018.02.026",
"pmid": "29481910",
"title": "Hypothermia outcome prediction after extracorporeal life support for hypothermic cardiac arrest patients: The HOPE score",
"source": "Resuscitation. 2018;126:58-64",
"authors": "Pasquier M, Hugli O, Paal P, Darocha T, Blancher M, Husby P, Silfvast T, Carron PN, Rousson V"
},
"age_years": 40,
"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.",
"temperature_c": 28,
"cpr_duration_min": 30,
"potassium_mmol_l": 4,
"formula_expression": "logit = 2.44 - 1.55*male - 1.95*asphyxia - 0.0191*age - 2.07*log2(potassium_mmol_l) - 0.573*log2(cpr_duration_min) + 0.937*temperature_c - 0.0247*temperature_c^2; survival_probability = exp(logit)/(1+exp(logit)); estimated_survival_percent = 100 * survival_probability from the unrounded logit, 2 decimals; male is 1 if sex is male else 0; asphyxia is 1 if asphyxia-related (head fully covered by water or snow AND cardiac arrest at extrication) else 0; hope_ge_10_percent is true when survival_probability >= 0.10 (Pasquier 2018 Table 2)",
"hope_ge_10_percent": true,
"estimated_survival_percent": 83.14
}
]
}
},
"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",
"asphyxia",
"cpr_duration_min",
"potassium_mmol_l",
"temperature_c"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years, integer 0-100. Pasquier 2018 coefficient -0.0191 per year. magent does not read an identity document."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used as the published Pasquier 2018 male coefficient (male = 1, female = 0). Not race. magent does not examine the patient."
},
"asphyxia": {
"type": "boolean",
"description": "true if the caller assigns an asphyxia-related mechanism: head fully covered by water or snow AND cardiac arrest at extrication (Pasquier 2018). true scores 1 in the logit; false scores 0. magent does not classify the scene."
},
"temperature_c": {
"type": "number",
"description": "Core temperature in C (10-37). Linear and squared Pasquier 2018 terms. Caller-supplied; magent does not measure temperature or convert Fahrenheit."
},
"cpr_duration_min": {
"type": "number",
"description": "Duration of CPR in minutes from start of CPR to ECLS (1-480). Enters as log2. Must be greater than 0 (0 is invalid). Caller-supplied; magent does not time the arrest."
},
"potassium_mmol_l": {
"type": "number",
"description": "Serum potassium in mmol/L (0.5-20). Enters as log2. Must be greater than 0. Caller-supplied; magent does not assay potassium."
}
}
},
"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 11:46Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 10:15Z
- 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/hope, 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.