magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
ThakarArfCardiac-surgeryKidneyCalculator
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 13:00Z
—
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/thakar",
"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/thakar",
"tags": [
"thakar",
"arf",
"cardiac-surgery",
"kidney",
"calculator"
],
"mimeType": "application/json",
"description": "Thakar 2005 clinical score for acute renal failure requiring dialysis after open-heart surgery. Points from sex, CHF, LVEF <35%, preoperative IABP, COPD, insulin-requiring diabetes, previous cardiac surgery, emergency surgery, procedure type (CABG / valve / CABG+valve / other), and preoperative creatinine (<1.2 / 1.2 to <2.1 / >=2.1 mg/dL). Returns integer score (max 17) and category 0–2 / 3–5 / 6–8 / 9–13. Not a dialysis order; not AKIN or RIFLE staging.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"sex": "male",
"copd": false,
"lvef_lt_35": false,
"surgery_type": "cabg",
"creatinine_mg_dl": 1,
"insulin_diabetes": false,
"creatinine_umol_l": 88.42,
"emergency_surgery": false,
"preoperative_iabp": false,
"congestive_heart_failure": false,
"previous_cardiac_surgery": false
}
},
"output": {
"type": "json",
"example": {
"sex": "male",
"score": 0,
"formula": "thakar",
"citation": {
"id": "thakar-2005",
"doi": "10.1681/ASN.2004040331",
"pmid": "15563569",
"title": "A clinical score to predict acute renal failure after cardiac surgery",
"source": "J Am Soc Nephrol. 2005;16(1):162-168",
"authors": "Thakar CV, Arrigain S, Worley S, Yared JP, Paganini EP"
},
"max_score": 17,
"components": [
{
"factor": "female",
"points": 0,
"present": false
},
{
"factor": "congestive_heart_failure",
"points": 0,
"present": false
},
{
"factor": "lvef_lt_35",
"points": 0,
"present": false
},
{
"factor": "preoperative_iabp",
"points": 0,
"present": false
},
{
"factor": "copd",
"points": 0,
"present": false
},
{
"factor": "insulin_diabetes",
"points": 0,
"present": false
},
{
"factor": "previous_cardiac_surgery",
"points": 0,
"present": false
},
{
"factor": "emergency_surgery",
"points": 0,
"present": false
},
{
"value": "cabg",
"factor": "surgery_type",
"points": 0,
"present": false
},
{
"value": 1,
"factor": "creatinine_mg_dl",
"points": 0,
"present": false
}
],
"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.",
"surgery_type": "cabg",
"thakar_category": "0_to_2",
"creatinine_mg_dl": 1,
"formula_expression": "Thakar 2005 = female(1) + congestive_heart_failure(1) + lvef_lt_35(1) + preoperative_iabp(2) + copd(1) + insulin_diabetes(1) + previous_cardiac_surgery(1) + emergency_surgery(2) + surgery_type(cabg 0, valve 1, cabg_valve 2, other 2) + creatinine_mg_dl(<1.2: 0, 1.2 to <2.1: 2, >=2.1: 5); max 17; categories 0-2 / 3-5 / 6-8 / 9-13"
}
},
"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": [
"sex",
"surgery_type",
"congestive_heart_failure",
"lvef_lt_35",
"preoperative_iabp",
"copd",
"insulin_diabetes",
"previous_cardiac_surgery",
"emergency_surgery"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male (Thakar 2005). Female scores 1. Male scores 0. Assigned by the caller."
},
"copd": {
"type": "boolean",
"description": "COPD requiring medical therapy as assigned by the caller (Thakar 2005). true scores 1. true or false."
},
"lvef_lt_35": {
"type": "boolean",
"description": "Left-ventricular ejection fraction <35% as assigned by the caller (Thakar 2005). true scores 1. Flag only; do not send an LVEF number. magent does not measure ejection fraction."
},
"surgery_type": {
"enum": [
"cabg",
"valve",
"cabg_valve",
"other"
],
"type": "string",
"description": "cabg (CABG only, reference, 0), valve (valve only, +1), cabg_valve (CABG + valve, +2), or other (other cardiac surgeries such as ventricular aneurysm repair or pericardiectomy, +2). Thakar 2005. Assigned by the caller."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Preoperative serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l, not both. Thakar 2005 scoring table: <1.2 scores 0; 1.2 to <2.1 scores 2; >=2.1 scores 5. 2.0 mg/dL scores 2. magent does not assay creatinine."
},
"insulin_diabetes": {
"type": "boolean",
"description": "Insulin-requiring diabetes as assigned by the caller (Thakar 2005). true scores 1. true or false."
},
"creatinine_umol_l": {
"type": "number",
"description": "Preoperative serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42."
},
"emergency_surgery": {
"type": "boolean",
"description": "Emergency surgery as assigned by the caller (Thakar 2005). true scores 2. true or false."
},
"preoperative_iabp": {
"type": "boolean",
"description": "Preoperative intra-aortic balloon pump as assigned by the caller (Thakar 2005). true scores 2. true or false."
},
"congestive_heart_failure": {
"type": "boolean",
"description": "Congestive heart failure as assigned by the caller (Thakar 2005). true scores 1. true or false. magent does not examine the patient."
},
"previous_cardiac_surgery": {
"type": "boolean",
"description": "Previous cardiac surgery as assigned by the caller (Thakar 2005). true scores 1. true or false."
}
}
}
},
"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/thakar",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"sex": "male",
"copd": false,
"lvef_lt_35": false,
"surgery_type": "cabg",
"creatinine_mg_dl": 1,
"insulin_diabetes": false,
"creatinine_umol_l": 88.42,
"emergency_surgery": false,
"preoperative_iabp": false,
"congestive_heart_failure": false,
"previous_cardiac_surgery": false
},
{
"sex": "male",
"copd": false,
"lvef_lt_35": false,
"surgery_type": "cabg",
"creatinine_mg_dl": 1,
"insulin_diabetes": false,
"creatinine_umol_l": 88.42,
"emergency_surgery": false,
"preoperative_iabp": false,
"congestive_heart_failure": false,
"previous_cardiac_surgery": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/thakar",
"count": 2,
"items": [
{
"sex": "male",
"score": 0,
"formula": "thakar",
"citation": {
"id": "thakar-2005",
"doi": "10.1681/ASN.2004040331",
"pmid": "15563569",
"title": "A clinical score to predict acute renal failure after cardiac surgery",
"source": "J Am Soc Nephrol. 2005;16(1):162-168",
"authors": "Thakar CV, Arrigain S, Worley S, Yared JP, Paganini EP"
},
"max_score": 17,
"components": [
{
"factor": "female",
"points": 0,
"present": false
},
{
"factor": "congestive_heart_failure",
"points": 0,
"present": false
},
{
"factor": "lvef_lt_35",
"points": 0,
"present": false
},
{
"factor": "preoperative_iabp",
"points": 0,
"present": false
},
{
"factor": "copd",
"points": 0,
"present": false
},
{
"factor": "insulin_diabetes",
"points": 0,
"present": false
},
{
"factor": "previous_cardiac_surgery",
"points": 0,
"present": false
},
{
"factor": "emergency_surgery",
"points": 0,
"present": false
},
{
"value": "cabg",
"factor": "surgery_type",
"points": 0,
"present": false
},
{
"value": 1,
"factor": "creatinine_mg_dl",
"points": 0,
"present": false
}
],
"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.",
"surgery_type": "cabg",
"thakar_category": "0_to_2",
"creatinine_mg_dl": 1,
"formula_expression": "Thakar 2005 = female(1) + congestive_heart_failure(1) + lvef_lt_35(1) + preoperative_iabp(2) + copd(1) + insulin_diabetes(1) + previous_cardiac_surgery(1) + emergency_surgery(2) + surgery_type(cabg 0, valve 1, cabg_valve 2, other 2) + creatinine_mg_dl(<1.2: 0, 1.2 to <2.1: 2, >=2.1: 5); max 17; categories 0-2 / 3-5 / 6-8 / 9-13"
},
{
"sex": "male",
"score": 0,
"formula": "thakar",
"citation": {
"id": "thakar-2005",
"doi": "10.1681/ASN.2004040331",
"pmid": "15563569",
"title": "A clinical score to predict acute renal failure after cardiac surgery",
"source": "J Am Soc Nephrol. 2005;16(1):162-168",
"authors": "Thakar CV, Arrigain S, Worley S, Yared JP, Paganini EP"
},
"max_score": 17,
"components": [
{
"factor": "female",
"points": 0,
"present": false
},
{
"factor": "congestive_heart_failure",
"points": 0,
"present": false
},
{
"factor": "lvef_lt_35",
"points": 0,
"present": false
},
{
"factor": "preoperative_iabp",
"points": 0,
"present": false
},
{
"factor": "copd",
"points": 0,
"present": false
},
{
"factor": "insulin_diabetes",
"points": 0,
"present": false
},
{
"factor": "previous_cardiac_surgery",
"points": 0,
"present": false
},
{
"factor": "emergency_surgery",
"points": 0,
"present": false
},
{
"value": "cabg",
"factor": "surgery_type",
"points": 0,
"present": false
},
{
"value": 1,
"factor": "creatinine_mg_dl",
"points": 0,
"present": false
}
],
"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.",
"surgery_type": "cabg",
"thakar_category": "0_to_2",
"creatinine_mg_dl": 1,
"formula_expression": "Thakar 2005 = female(1) + congestive_heart_failure(1) + lvef_lt_35(1) + preoperative_iabp(2) + copd(1) + insulin_diabetes(1) + previous_cardiac_surgery(1) + emergency_surgery(2) + surgery_type(cabg 0, valve 1, cabg_valve 2, other 2) + creatinine_mg_dl(<1.2: 0, 1.2 to <2.1: 2, >=2.1: 5); max 17; categories 0-2 / 3-5 / 6-8 / 9-13"
}
]
}
},
"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": [
"sex",
"surgery_type",
"congestive_heart_failure",
"lvef_lt_35",
"preoperative_iabp",
"copd",
"insulin_diabetes",
"previous_cardiac_surgery",
"emergency_surgery"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male (Thakar 2005). Female scores 1. Male scores 0. Assigned by the caller."
},
"copd": {
"type": "boolean",
"description": "COPD requiring medical therapy as assigned by the caller (Thakar 2005). true scores 1. true or false."
},
"lvef_lt_35": {
"type": "boolean",
"description": "Left-ventricular ejection fraction <35% as assigned by the caller (Thakar 2005). true scores 1. Flag only; do not send an LVEF number. magent does not measure ejection fraction."
},
"surgery_type": {
"enum": [
"cabg",
"valve",
"cabg_valve",
"other"
],
"type": "string",
"description": "cabg (CABG only, reference, 0), valve (valve only, +1), cabg_valve (CABG + valve, +2), or other (other cardiac surgeries such as ventricular aneurysm repair or pericardiectomy, +2). Thakar 2005. Assigned by the caller."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Preoperative serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l, not both. Thakar 2005 scoring table: <1.2 scores 0; 1.2 to <2.1 scores 2; >=2.1 scores 5. 2.0 mg/dL scores 2. magent does not assay creatinine."
},
"insulin_diabetes": {
"type": "boolean",
"description": "Insulin-requiring diabetes as assigned by the caller (Thakar 2005). true scores 1. true or false."
},
"creatinine_umol_l": {
"type": "number",
"description": "Preoperative serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42."
},
"emergency_surgery": {
"type": "boolean",
"description": "Emergency surgery as assigned by the caller (Thakar 2005). true scores 2. true or false."
},
"preoperative_iabp": {
"type": "boolean",
"description": "Preoperative intra-aortic balloon pump as assigned by the caller (Thakar 2005). true scores 2. true or false."
},
"congestive_heart_failure": {
"type": "boolean",
"description": "Congestive heart failure as assigned by the caller (Thakar 2005). true scores 1. true or false. magent does not examine the patient."
},
"previous_cardiac_surgery": {
"type": "boolean",
"description": "Previous cardiac surgery as assigned by the caller (Thakar 2005). true scores 1. true or false."
}
}
},
"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 13:00Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 20:45Z
- 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. 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/thakar, 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.