magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Inferenceofflineeip155:8453Exactvia cdp
ReynoldsCvd-riskLipidsHscrpCalculator
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 2026-09-02 02:17Z
—
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/reynolds",
"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/reynolds",
"tags": [
"reynolds",
"cvd-risk",
"lipids",
"hscrp",
"calculator"
],
"mimeType": "application/json",
"description": "Ridker JAMA 2007 Reynolds Risk Score, women Model B only: 10-year CVD percent from age, SBP, hsCRP, total cholesterol, HDL-C, HbA1c if diabetic, current smoking, and parental MI before 60. Natural-log Box formula. Not men (Ridker 2008), not ATP-III, not 2013 PCE, not a diagnosis or statin order. magent does not assay lipids or hsCRP.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 55,
"smoker": false,
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"hscrp_mg_l": 2,
"a1c_percent": 7.5,
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
}
},
"output": {
"type": "json",
"example": {
"b": 22.4031,
"age": 55,
"smoker": false,
"formula": "reynolds",
"citation": {
"id": "ridker-2007",
"doi": "10.1001/jama.297.6.611",
"pmid": "17299196",
"title": "Development and validation of improved algorithms for the assessment of global cardiovascular risk in women: the Reynolds Risk Score",
"source": "JAMA. 2007;297(6):611-619",
"authors": "Ridker PM, Buring JE, Rifai N, Cook NR"
},
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"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.",
"hscrp_mg_l": 2,
"risk_percent": 1.5,
"formula_expression": "10-year CVD risk (%) = [1 - 0.98634^(exp(B - 22.325))] * 100; B = 0.0799*age + 3.137*ln(SBP) + 0.180*ln(hsCRP) + 1.382*ln(total cholesterol) - 1.172*ln(HDL-C) + 0.134*HbA1c(%) [if diabetic] + 0.818 [if current smoker] + 0.438 [if family history of premature MI]; Ridker JAMA 2007 Model B women; natural log; cholesterol and HDL mg/dL; hsCRP mg/L; SBP mm Hg; not men; not ATP-III; not 2013 PCE",
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
}
},
"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",
"sbp_mm_hg",
"hscrp_mg_l",
"total_cholesterol_mg_dl",
"hdl_mg_dl",
"diabetes",
"smoker",
"family_mi_before_60"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 45-84). Ridker JAMA 2007 Model B was derived in women 45 years or older. magent accepts 45-84 only. Not men."
},
"smoker": {
"type": "boolean",
"description": "Current cigarette smoking as assigned by the caller. true adds 0.818. magent does not take a smoking history."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller. If true, a1c_percent (4-15) is required and adds 0.134*HbA1c(%). If false, omit a1c; the HbA1c term is not added. magent does not diagnose diabetes."
},
"hdl_mg_dl": {
"type": "number",
"description": "HDL cholesterol in mg/dL (5-150). Enters as ln(HDL-C). magent does not assay lipids."
},
"sbp_mm_hg": {
"type": "number",
"description": "Systolic blood pressure in mm Hg (50-250). Enters as ln(SBP). magent does not measure blood pressure."
},
"hscrp_mg_l": {
"type": "number",
"description": "High-sensitivity C-reactive protein in mg/L (0.1-50). Enters as ln(hsCRP). magent does not assay hsCRP."
},
"a1c_percent": {
"type": "number",
"description": "HbA1c in percent (4-15). Required when diabetes=true. Ignored when diabetes=false. magent does not assay HbA1c."
},
"family_mi_before_60": {
"type": "boolean",
"description": "Parental myocardial infarction before age 60 as assigned by the caller. true adds 0.438. magent does not take a family history."
},
"total_cholesterol_mg_dl": {
"type": "number",
"description": "Total cholesterol in mg/dL (50-800). Enters as ln(total cholesterol). magent does not assay lipids."
}
}
}
},
"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/reynolds",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 55,
"smoker": false,
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"hscrp_mg_l": 2,
"a1c_percent": 7.5,
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
},
{
"age": 55,
"smoker": false,
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"hscrp_mg_l": 2,
"a1c_percent": 7.5,
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/reynolds",
"count": 2,
"items": [
{
"b": 22.4031,
"age": 55,
"smoker": false,
"formula": "reynolds",
"citation": {
"id": "ridker-2007",
"doi": "10.1001/jama.297.6.611",
"pmid": "17299196",
"title": "Development and validation of improved algorithms for the assessment of global cardiovascular risk in women: the Reynolds Risk Score",
"source": "JAMA. 2007;297(6):611-619",
"authors": "Ridker PM, Buring JE, Rifai N, Cook NR"
},
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"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.",
"hscrp_mg_l": 2,
"risk_percent": 1.5,
"formula_expression": "10-year CVD risk (%) = [1 - 0.98634^(exp(B - 22.325))] * 100; B = 0.0799*age + 3.137*ln(SBP) + 0.180*ln(hsCRP) + 1.382*ln(total cholesterol) - 1.172*ln(HDL-C) + 0.134*HbA1c(%) [if diabetic] + 0.818 [if current smoker] + 0.438 [if family history of premature MI]; Ridker JAMA 2007 Model B women; natural log; cholesterol and HDL mg/dL; hsCRP mg/L; SBP mm Hg; not men; not ATP-III; not 2013 PCE",
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
},
{
"b": 22.4031,
"age": 55,
"smoker": false,
"formula": "reynolds",
"citation": {
"id": "ridker-2007",
"doi": "10.1001/jama.297.6.611",
"pmid": "17299196",
"title": "Development and validation of improved algorithms for the assessment of global cardiovascular risk in women: the Reynolds Risk Score",
"source": "JAMA. 2007;297(6):611-619",
"authors": "Ridker PM, Buring JE, Rifai N, Cook NR"
},
"diabetes": false,
"hdl_mg_dl": 50,
"sbp_mm_hg": 125,
"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.",
"hscrp_mg_l": 2,
"risk_percent": 1.5,
"formula_expression": "10-year CVD risk (%) = [1 - 0.98634^(exp(B - 22.325))] * 100; B = 0.0799*age + 3.137*ln(SBP) + 0.180*ln(hsCRP) + 1.382*ln(total cholesterol) - 1.172*ln(HDL-C) + 0.134*HbA1c(%) [if diabetic] + 0.818 [if current smoker] + 0.438 [if family history of premature MI]; Ridker JAMA 2007 Model B women; natural log; cholesterol and HDL mg/dL; hsCRP mg/L; SBP mm Hg; not men; not ATP-III; not 2013 PCE",
"family_mi_before_60": false,
"total_cholesterol_mg_dl": 200
}
]
}
},
"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",
"sbp_mm_hg",
"hscrp_mg_l",
"total_cholesterol_mg_dl",
"hdl_mg_dl",
"diabetes",
"smoker",
"family_mi_before_60"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 45-84). Ridker JAMA 2007 Model B was derived in women 45 years or older. magent accepts 45-84 only. Not men."
},
"smoker": {
"type": "boolean",
"description": "Current cigarette smoking as assigned by the caller. true adds 0.818. magent does not take a smoking history."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller. If true, a1c_percent (4-15) is required and adds 0.134*HbA1c(%). If false, omit a1c; the HbA1c term is not added. magent does not diagnose diabetes."
},
"hdl_mg_dl": {
"type": "number",
"description": "HDL cholesterol in mg/dL (5-150). Enters as ln(HDL-C). magent does not assay lipids."
},
"sbp_mm_hg": {
"type": "number",
"description": "Systolic blood pressure in mm Hg (50-250). Enters as ln(SBP). magent does not measure blood pressure."
},
"hscrp_mg_l": {
"type": "number",
"description": "High-sensitivity C-reactive protein in mg/L (0.1-50). Enters as ln(hsCRP). magent does not assay hsCRP."
},
"a1c_percent": {
"type": "number",
"description": "HbA1c in percent (4-15). Required when diabetes=true. Ignored when diabetes=false. magent does not assay HbA1c."
},
"family_mi_before_60": {
"type": "boolean",
"description": "Parental myocardial infarction before age 60 as assigned by the caller. true adds 0.438. magent does not take a family history."
},
"total_cholesterol_mg_dl": {
"type": "number",
"description": "Total cholesterol in mg/dL (50-800). Enters as ln(total cholesterol). magent does not assay lipids."
}
}
},
"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
- 2026-09-02 02:17Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 17:45Z
- 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. 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/reynolds, 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.