magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
PreventCvd-riskLipidsAha-2024Calculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 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 2026-09-03 02:20Z
—
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/prevent",
"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/prevent",
"tags": [
"prevent",
"cvd-risk",
"lipids",
"aha-2024",
"calculator"
],
"mimeType": "application/json",
"description": "Khan 2024 AHA PREVENT base 10-year total CVD percent (ASCVD plus heart failure) for age 30-79 from sex, lipids, treated systolic BP, diabetes, smoking, eGFR, BMI, antihypertensive, and statin. Sex-specific, race-free Table S12 coefficients. Not 30-year, not ASCVD-only, not HF-only, not 2013 PCE, not SCORE2, not a diagnosis or statin order. magent does not assay lipids.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 50,
"sex": "female",
"smoker": false,
"statin": false,
"diabetes": false,
"bmi_kg_m2": 35,
"hdl_mg_dl": 55,
"sbp_mm_hg": 160,
"antihypertensive": true,
"egfr_ml_min_1_73m2": 90,
"total_cholesterol_mg_dl": 240
}
},
"output": {
"type": "json",
"example": {
"age": 50,
"sex": "female",
"smoker": false,
"statin": false,
"formula": "prevent",
"citation": {
"id": "khan-2024-prevent",
"doi": "10.1161/CIRCULATIONAHA.123.067626",
"pmid": "37947085",
"title": "Development and Validation of the American Heart Association’s PREVENT Equations",
"source": "Circulation. 2024;149(6):430-449",
"authors": "Khan SS, Matsushita K, Sang Y, Ballew SH, Grams ME, Surapaneni A, et al.; Chronic Kidney Disease Prognosis Consortium and the AHA Cardiovascular-Kidney-Metabolic Science Advisory Group"
},
"diabetes": false,
"bmi_kg_m2": 35,
"hdl_mg_dl": 55,
"sbp_mm_hg": 160,
"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.",
"antihypertensive": true,
"linear_predictor": -2.8579,
"egfr_ml_min_1_73m2": 90,
"formula_expression": "10-year total CVD % = 100*exp(lp)/(1+exp(lp)); Khan 2024 Supplement Table S12 base 10-year total CVD (ASCVD+HF) only; sex-specific race-free; age 30-79; cage=(age-55)/10; mg/dL*0.02586 to mmol/L; cnhdl=(TC-HDL)*0.02586-3.5; chdl=(HDL*0.02586-1.3)/0.3; sbp_lt110=(min(SBP,110)-110)/20; sbp_ge110=(max(SBP,110)-130)/20; egfr_lt60=(min(eGFR,60)-60)/-15; egfr_ge60=(max(eGFR,60)-90)/-15; BMI spline printed at 30 with S12 total-CVD betas 0; women lp=-3.307728+0.7939329*cage+0.0305239*cnhdl-0.1606857*chdl-0.2394003*sbp_lt110+0.3600781*sbp_ge110+0.8667604*dm+0.5360739*smoke+0.6045917*egfr_lt60+0.0433769*egfr_ge60+0.3151672*antihtn-0.1477655*statin-0.0663612*sbp_ge110*antihtn+0.1197879*cnhdl*statin-0.0819715*cage*cnhdl+0.0306769*cage*chdl-0.0946348*cage*sbp_ge110-0.27057*cage*dm-0.078715*cage*smoke-0.1637806*cage*egfr_lt60; men lp=-3.031168+0.7688528*cage+0.0736174*cnhdl-0.0954431*chdl-0.4347345*sbp_lt110+0.3362658*sbp_ge110+0.7692857*dm+0.4386871*smoke+0.5378979*egfr_lt60+0.0164827*egfr_ge60+0.288879*antihtn-0.1337349*statin-0.0475924*sbp_ge110*antihtn+0.150273*cnhdl*statin-0.0517874*cage*cnhdl+0.0191169*cage*chdl-0.1049477*cage*sbp_ge110-0.2251948*cage*dm-0.0895067*cage*smoke-0.1543702*cage*egfr_lt60; not 30-year; not ASCVD-only; not HF-only; not HbA1c/UACR/SDI add-ons; not 2013 PCE; not SCORE2",
"ten_year_cvd_percent": 5.4,
"total_cholesterol_mg_dl": 240
}
},
"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",
"total_cholesterol_mg_dl",
"hdl_mg_dl",
"sbp_mm_hg",
"antihypertensive",
"statin",
"diabetes",
"smoker",
"egfr_ml_min_1_73m2",
"bmi_kg_m2"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 30-79). Khan 2024 PREVENT base 10-year total CVD is for ages 30-79. Not 30-year PREVENT (that horizon is not returned)."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used by the sex-specific Table S12 base 10-year total-CVD coefficients (female or male). Not race. PREVENT is race-free."
},
"smoker": {
"type": "boolean",
"description": "Current cigarette smoking as assigned by the caller (true or false). magent does not take a smoking history."
},
"statin": {
"type": "boolean",
"description": "Current statin use as assigned by the caller (true or false). Adds the Table S12 statin term and the statin × non-HDL interaction."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller (true or false). Adds the Table S12 diabetes term and the age × diabetes interaction. Not the optional HbA1c add-on equation."
},
"bmi_kg_m2": {
"type": "number",
"description": "Body-mass index in kg/m2 (10-80). Required Khan 2024 predictor. Table S12 base 10-year total-CVD BMI coefficients are 0 (BMI enters the HF-only equations, which this tool does not return)."
},
"hdl_mg_dl": {
"type": "number",
"description": "HDL cholesterol in mg/dL (5-150). Converted as mg/dL*0.02586 to mmol/L. Enters as (HDL-1.3)/0.3. magent does not assay lipids."
},
"sbp_mm_hg": {
"type": "number",
"description": "Systolic blood pressure in mm Hg (50-250). Piecewise around 110 mm Hg, with a treated-SBP interaction when antihypertensive is true. magent does not measure blood pressure."
},
"antihypertensive": {
"type": "boolean",
"description": "Current antihypertensive treatment as assigned by the caller (true or false). Adds the Table S12 antihypertensive term and the treated SBP interaction."
},
"egfr_ml_min_1_73m2": {
"type": "number",
"description": "Caller-assigned eGFR in mL/min/1.73m2 (5-200). Piecewise around 60. magent does not compute MDRD or CKD-EPI."
},
"total_cholesterol_mg_dl": {
"type": "number",
"description": "Total cholesterol in mg/dL (50-800). Converted as mg/dL*0.02586 to mmol/L. Enters as non-HDL (TC-HDL) centered at 3.5 mmol/L. 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
0.005USDC≈ $0.005 USD
on Base · batch-settlement 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/prevent",
"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
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 50,
"sex": "female",
"smoker": false,
"statin": false,
"diabetes": false,
"bmi_kg_m2": 35,
"hdl_mg_dl": 55,
"sbp_mm_hg": 160,
"antihypertensive": true,
"egfr_ml_min_1_73m2": 90,
"total_cholesterol_mg_dl": 240
}
},
"output": {
"type": "json",
"example": {
"age": 50,
"sex": "female",
"smoker": false,
"statin": false,
"formula": "prevent",
"citation": {
"id": "khan-2024-prevent",
"doi": "10.1161/CIRCULATIONAHA.123.067626",
"pmid": "37947085",
"title": "Development and Validation of the American Heart Association’s PREVENT Equations",
"source": "Circulation. 2024;149(6):430-449",
"authors": "Khan SS, Matsushita K, Sang Y, Ballew SH, Grams ME, Surapaneni A, et al.; Chronic Kidney Disease Prognosis Consortium and the AHA Cardiovascular-Kidney-Metabolic Science Advisory Group"
},
"diabetes": false,
"bmi_kg_m2": 35,
"hdl_mg_dl": 55,
"sbp_mm_hg": 160,
"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.",
"antihypertensive": true,
"linear_predictor": -2.8579,
"egfr_ml_min_1_73m2": 90,
"formula_expression": "10-year total CVD % = 100*exp(lp)/(1+exp(lp)); Khan 2024 Supplement Table S12 base 10-year total CVD (ASCVD+HF) only; sex-specific race-free; age 30-79; cage=(age-55)/10; mg/dL*0.02586 to mmol/L; cnhdl=(TC-HDL)*0.02586-3.5; chdl=(HDL*0.02586-1.3)/0.3; sbp_lt110=(min(SBP,110)-110)/20; sbp_ge110=(max(SBP,110)-130)/20; egfr_lt60=(min(eGFR,60)-60)/-15; egfr_ge60=(max(eGFR,60)-90)/-15; BMI spline printed at 30 with S12 total-CVD betas 0; women lp=-3.307728+0.7939329*cage+0.0305239*cnhdl-0.1606857*chdl-0.2394003*sbp_lt110+0.3600781*sbp_ge110+0.8667604*dm+0.5360739*smoke+0.6045917*egfr_lt60+0.0433769*egfr_ge60+0.3151672*antihtn-0.1477655*statin-0.0663612*sbp_ge110*antihtn+0.1197879*cnhdl*statin-0.0819715*cage*cnhdl+0.0306769*cage*chdl-0.0946348*cage*sbp_ge110-0.27057*cage*dm-0.078715*cage*smoke-0.1637806*cage*egfr_lt60; men lp=-3.031168+0.7688528*cage+0.0736174*cnhdl-0.0954431*chdl-0.4347345*sbp_lt110+0.3362658*sbp_ge110+0.7692857*dm+0.4386871*smoke+0.5378979*egfr_lt60+0.0164827*egfr_ge60+0.288879*antihtn-0.1337349*statin-0.0475924*sbp_ge110*antihtn+0.150273*cnhdl*statin-0.0517874*cage*cnhdl+0.0191169*cage*chdl-0.1049477*cage*sbp_ge110-0.2251948*cage*dm-0.0895067*cage*smoke-0.1543702*cage*egfr_lt60; not 30-year; not ASCVD-only; not HF-only; not HbA1c/UACR/SDI add-ons; not 2013 PCE; not SCORE2",
"ten_year_cvd_percent": 5.4,
"total_cholesterol_mg_dl": 240
}
},
"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",
"total_cholesterol_mg_dl",
"hdl_mg_dl",
"sbp_mm_hg",
"antihypertensive",
"statin",
"diabetes",
"smoker",
"egfr_ml_min_1_73m2",
"bmi_kg_m2"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 30-79). Khan 2024 PREVENT base 10-year total CVD is for ages 30-79. Not 30-year PREVENT (that horizon is not returned)."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used by the sex-specific Table S12 base 10-year total-CVD coefficients (female or male). Not race. PREVENT is race-free."
},
"smoker": {
"type": "boolean",
"description": "Current cigarette smoking as assigned by the caller (true or false). magent does not take a smoking history."
},
"statin": {
"type": "boolean",
"description": "Current statin use as assigned by the caller (true or false). Adds the Table S12 statin term and the statin × non-HDL interaction."
},
"diabetes": {
"type": "boolean",
"description": "Diabetes as assigned by the caller (true or false). Adds the Table S12 diabetes term and the age × diabetes interaction. Not the optional HbA1c add-on equation."
},
"bmi_kg_m2": {
"type": "number",
"description": "Body-mass index in kg/m2 (10-80). Required Khan 2024 predictor. Table S12 base 10-year total-CVD BMI coefficients are 0 (BMI enters the HF-only equations, which this tool does not return)."
},
"hdl_mg_dl": {
"type": "number",
"description": "HDL cholesterol in mg/dL (5-150). Converted as mg/dL*0.02586 to mmol/L. Enters as (HDL-1.3)/0.3. magent does not assay lipids."
},
"sbp_mm_hg": {
"type": "number",
"description": "Systolic blood pressure in mm Hg (50-250). Piecewise around 110 mm Hg, with a treated-SBP interaction when antihypertensive is true. magent does not measure blood pressure."
},
"antihypertensive": {
"type": "boolean",
"description": "Current antihypertensive treatment as assigned by the caller (true or false). Adds the Table S12 antihypertensive term and the treated SBP interaction."
},
"egfr_ml_min_1_73m2": {
"type": "number",
"description": "Caller-assigned eGFR in mL/min/1.73m2 (5-200). Piecewise around 60. magent does not compute MDRD or CKD-EPI."
},
"total_cholesterol_mg_dl": {
"type": "number",
"description": "Total cholesterol in mg/dL (50-800). Converted as mg/dL*0.02586 to mmol/L. Enters as non-HDL (TC-HDL) centered at 3.5 mmol/L. magent does not assay lipids."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-03 02:20Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 19:16Z
- 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. 7 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/prevent, 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.