magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Inferenceofflineeip155:8453Exactvia cdp
Leibovich-2018RccKidneyPrognosisCalculator
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 04:40Z
—
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/leibovich_2018",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
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{
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"extra": {
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"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://api.magentlab.com/api/calc/leibovich_2018",
"tags": [
"leibovich-2018",
"rcc",
"kidney",
"prognosis",
"calculator"
],
"mimeType": "application/json",
"description": "Leibovich 2018 histology-specific RCC models after surgery. Required histology clear_cell, papillary, or chromophobe. ccRCC PFS points (2010 TNM): t1a/t1b/t2a 0, t2b 2, t3a-t3c 3, t4 4; nx/n0 0, n1 2; size ≥10 cm 1; grade 1-2 0, 3 1, 4 3; necrosis 2; max 12; risk low 0-2, intermediate 3-5, high ≥6. Papillary and chromophobe return the 2018 three PFS groups (score 0-2). Not SSIGN. Not Leibovich 2003. magent does not stage or read pathology. Not a diagnosis. Not a medical device.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"n_stage": "n0",
"t_stage": "t1a",
"necrosis": false,
"histology": "clear_cell",
"nuclear_grade": 2,
"tumor_size_cm": 3
}
},
"output": {
"type": "json",
"example": {
"risk": "low",
"score": 0,
"formula": "leibovich_2018",
"n_stage": "n0",
"t_stage": "t1a",
"citation": {
"id": "leibovich-2018",
"doi": "10.1016/j.eururo.2018.01.005",
"pmid": "29398265",
"title": "Predicting Oncologic Outcomes in Renal Cell Carcinoma After Surgery",
"source": "Eur Urol. 2018;73(5):772-780",
"authors": "Leibovich BC, Lohse CM, Cheville JC, Zaid HB, Boorjian SA, Frank I, Thompson RH, Parker WP"
},
"necrosis": false,
"histology": "clear_cell",
"max_score": 12,
"components": [
{
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"factor": "t_stage",
"points": 0,
"present": true
},
{
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"factor": "n_stage",
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"present": true
},
{
"value": 3,
"factor": "tumor_size_cm",
"points": 0,
"present": false
},
{
"value": 2,
"factor": "nuclear_grade",
"points": 0,
"present": true
},
{
"factor": "necrosis",
"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.",
"nuclear_grade": 2,
"tumor_size_cm": 3,
"formula_expression": "ccRCC PFS (Leibovich 2018, 2010 TNM): t_stage (t1a/t1b/t2a 0, t2b 2, t3a/t3b/t3c 3, t4 4) + n_stage (nx/n0 0, n1 2) + tumor_size_cm >=10 1 + nuclear_grade (1-2 0, 3 1, 4 3) + necrosis 2; max 12; risk low 0-2, intermediate 3-5, high >=6. papillary PFS groups: low grade 1-2 and t1-t2; intermediate grade 3 and t1-t2; high grade 4 or t3a-t4 (fat or thrombus). chromophobe PFS groups: low t1-t2 and nx/n0; intermediate t3a-t4 and nx/n0 (fat); high n1. Not Frank 2002 SSIGN. Not Leibovich 2003. No chromophobe CSS model."
}
},
"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": [
"histology",
"t_stage",
"n_stage",
"tumor_size_cm",
"nuclear_grade",
"necrosis"
],
"properties": {
"n_stage": {
"enum": [
"nx",
"n0",
"n1"
],
"type": "string",
"description": "2010 pathologic N as assigned by the caller (Leibovich 2018). nx or n0 scores 0 on ccRCC; n1 scores 2. Not n2 (2002 N). magent does not stage nodes."
},
"t_stage": {
"enum": [
"t1a",
"t1b",
"t2a",
"t2b",
"t3a",
"t3b",
"t3c",
"t4"
],
"type": "string",
"description": "2010 pathologic T as assigned by the caller (Leibovich 2018). t1a, t1b, t2a, t2b, t3a, t3b, t3c, or t4. Not 1997/2002 T without a/b substages. magent does not stage the tumor."
},
"necrosis": {
"type": "boolean",
"description": "Histologic tumor necrosis as assigned by the caller (Leibovich 2018). true scores 2 on ccRCC. magent does not read slides."
},
"histology": {
"enum": [
"clear_cell",
"papillary",
"chromophobe"
],
"type": "string",
"description": "Surgical histology as assigned by the caller (Leibovich 2018). clear_cell, papillary, or chromophobe. Not collecting-duct or unclassified. magent does not read slides."
},
"nuclear_grade": {
"type": "integer",
"description": "Nuclear grade 1-4 as assigned by the caller (Leibovich 2018). On ccRCC, 1-2 score 0; 3 scores 1; 4 scores 3. Integer 1-4 only; reject 0, 5, 1.5, and roman I. magent does not read slides."
},
"tumor_size_cm": {
"type": "number",
"description": "Maximum tumor size in cm as assigned by the caller (Leibovich 2018). Unrounded; 10.0 cm or greater scores 1 on ccRCC. Magent clamp 0.1-30, not a published range. magent does not measure the tumor."
}
}
}
},
"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/leibovich_2018",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"n_stage": "n0",
"t_stage": "t1a",
"necrosis": false,
"histology": "clear_cell",
"nuclear_grade": 2,
"tumor_size_cm": 3
},
{
"n_stage": "n0",
"t_stage": "t1a",
"necrosis": false,
"histology": "clear_cell",
"nuclear_grade": 2,
"tumor_size_cm": 3
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/leibovich_2018",
"count": 2,
"items": [
{
"risk": "low",
"score": 0,
"formula": "leibovich_2018",
"n_stage": "n0",
"t_stage": "t1a",
"citation": {
"id": "leibovich-2018",
"doi": "10.1016/j.eururo.2018.01.005",
"pmid": "29398265",
"title": "Predicting Oncologic Outcomes in Renal Cell Carcinoma After Surgery",
"source": "Eur Urol. 2018;73(5):772-780",
"authors": "Leibovich BC, Lohse CM, Cheville JC, Zaid HB, Boorjian SA, Frank I, Thompson RH, Parker WP"
},
"necrosis": false,
"histology": "clear_cell",
"max_score": 12,
"components": [
{
"value": "t1a",
"factor": "t_stage",
"points": 0,
"present": true
},
{
"value": "n0",
"factor": "n_stage",
"points": 0,
"present": true
},
{
"value": 3,
"factor": "tumor_size_cm",
"points": 0,
"present": false
},
{
"value": 2,
"factor": "nuclear_grade",
"points": 0,
"present": true
},
{
"factor": "necrosis",
"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.",
"nuclear_grade": 2,
"tumor_size_cm": 3,
"formula_expression": "ccRCC PFS (Leibovich 2018, 2010 TNM): t_stage (t1a/t1b/t2a 0, t2b 2, t3a/t3b/t3c 3, t4 4) + n_stage (nx/n0 0, n1 2) + tumor_size_cm >=10 1 + nuclear_grade (1-2 0, 3 1, 4 3) + necrosis 2; max 12; risk low 0-2, intermediate 3-5, high >=6. papillary PFS groups: low grade 1-2 and t1-t2; intermediate grade 3 and t1-t2; high grade 4 or t3a-t4 (fat or thrombus). chromophobe PFS groups: low t1-t2 and nx/n0; intermediate t3a-t4 and nx/n0 (fat); high n1. Not Frank 2002 SSIGN. Not Leibovich 2003. No chromophobe CSS model."
},
{
"risk": "low",
"score": 0,
"formula": "leibovich_2018",
"n_stage": "n0",
"t_stage": "t1a",
"citation": {
"id": "leibovich-2018",
"doi": "10.1016/j.eururo.2018.01.005",
"pmid": "29398265",
"title": "Predicting Oncologic Outcomes in Renal Cell Carcinoma After Surgery",
"source": "Eur Urol. 2018;73(5):772-780",
"authors": "Leibovich BC, Lohse CM, Cheville JC, Zaid HB, Boorjian SA, Frank I, Thompson RH, Parker WP"
},
"necrosis": false,
"histology": "clear_cell",
"max_score": 12,
"components": [
{
"value": "t1a",
"factor": "t_stage",
"points": 0,
"present": true
},
{
"value": "n0",
"factor": "n_stage",
"points": 0,
"present": true
},
{
"value": 3,
"factor": "tumor_size_cm",
"points": 0,
"present": false
},
{
"value": 2,
"factor": "nuclear_grade",
"points": 0,
"present": true
},
{
"factor": "necrosis",
"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.",
"nuclear_grade": 2,
"tumor_size_cm": 3,
"formula_expression": "ccRCC PFS (Leibovich 2018, 2010 TNM): t_stage (t1a/t1b/t2a 0, t2b 2, t3a/t3b/t3c 3, t4 4) + n_stage (nx/n0 0, n1 2) + tumor_size_cm >=10 1 + nuclear_grade (1-2 0, 3 1, 4 3) + necrosis 2; max 12; risk low 0-2, intermediate 3-5, high >=6. papillary PFS groups: low grade 1-2 and t1-t2; intermediate grade 3 and t1-t2; high grade 4 or t3a-t4 (fat or thrombus). chromophobe PFS groups: low t1-t2 and nx/n0; intermediate t3a-t4 and nx/n0 (fat); high n1. Not Frank 2002 SSIGN. Not Leibovich 2003. No chromophobe CSS model."
}
]
}
},
"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": [
"histology",
"t_stage",
"n_stage",
"tumor_size_cm",
"nuclear_grade",
"necrosis"
],
"properties": {
"n_stage": {
"enum": [
"nx",
"n0",
"n1"
],
"type": "string",
"description": "2010 pathologic N as assigned by the caller (Leibovich 2018). nx or n0 scores 0 on ccRCC; n1 scores 2. Not n2 (2002 N). magent does not stage nodes."
},
"t_stage": {
"enum": [
"t1a",
"t1b",
"t2a",
"t2b",
"t3a",
"t3b",
"t3c",
"t4"
],
"type": "string",
"description": "2010 pathologic T as assigned by the caller (Leibovich 2018). t1a, t1b, t2a, t2b, t3a, t3b, t3c, or t4. Not 1997/2002 T without a/b substages. magent does not stage the tumor."
},
"necrosis": {
"type": "boolean",
"description": "Histologic tumor necrosis as assigned by the caller (Leibovich 2018). true scores 2 on ccRCC. magent does not read slides."
},
"histology": {
"enum": [
"clear_cell",
"papillary",
"chromophobe"
],
"type": "string",
"description": "Surgical histology as assigned by the caller (Leibovich 2018). clear_cell, papillary, or chromophobe. Not collecting-duct or unclassified. magent does not read slides."
},
"nuclear_grade": {
"type": "integer",
"description": "Nuclear grade 1-4 as assigned by the caller (Leibovich 2018). On ccRCC, 1-2 score 0; 3 scores 1; 4 scores 3. Integer 1-4 only; reject 0, 5, 1.5, and roman I. magent does not read slides."
},
"tumor_size_cm": {
"type": "number",
"description": "Maximum tumor size in cm as assigned by the caller (Leibovich 2018). Unrounded; 10.0 cm or greater scores 1 on ccRCC. Magent clamp 0.1-30, not a published range. magent does not measure the tumor."
}
}
},
"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 04:40Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 20:15Z
- 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/leibovich_2018, 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.