magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
TradingLiveeip155:8453Exactvia cdp
Renal-nephrometryKidneyUrologyNephrometryCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Last called 2026-08-30 21:10Z
—
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/renal_nephrometry",
"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/renal_nephrometry",
"tags": [
"renal-nephrometry",
"kidney",
"urology",
"nephrometry",
"calculator"
],
"mimeType": "application/json",
"description": "Kutikov 2009 R.E.N.A.L. nephrometry. Caller-assigned radius le_4 1 / gt_4_lt_7 2 / ge_7 3 (cm); exophytic ge_50 1 / lt_50 2 / entirely_endophytic 3; nearness ge_7 1 / gt_4_lt_7 2 / le_4 3 (mm); location entirely_polar 1 / crosses_polar 2 / gt_50_midline_or_between 3. Anterior a|p|x and hilar suffix h are descriptors, not points. Sum 4-12. No published complexity bands. Not PADUA. Not STONE nephrolithometry. magent does not read CT. Not a medical device. Not a nephrectomy order.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hilar": false,
"radius": "le_4",
"anterior": "a",
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50"
}
},
"output": {
"type": "json",
"example": {
"e": 1,
"l": 1,
"n": 1,
"r": 1,
"hilar": false,
"score": 4,
"radius": "le_4",
"formula": "renal_nephrometry",
"anterior": "a",
"citation": {
"id": "kutikov-2009",
"doi": "10.1016/j.juro.2009.05.035",
"pmid": "19616235",
"title": "The R.E.N.A.L. Nephrometry Score: A Comprehensive Standardized System for Quantitating Renal Tumor Size, Location and Depth",
"source": "J Urol. 2009;182(3):844-853",
"authors": "Kutikov A, Uzzo RG"
},
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50",
"max_score": 12,
"components": [
{
"value": "le_4",
"factor": "radius",
"points": 1,
"present": true
},
{
"value": "ge_50",
"factor": "exophytic",
"points": 1,
"present": true
},
{
"value": "ge_7",
"factor": "nearness",
"points": 1,
"present": true
},
{
"value": "entirely_polar",
"factor": "location",
"points": 1,
"present": true
}
],
"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.",
"renal_string": "4a",
"formula_expression": "RENAL = radius (le_4 1, gt_4_lt_7 2, ge_7 3) + exophytic (ge_50 1, lt_50 2, entirely_endophytic 3) + nearness (ge_7 1, gt_4_lt_7 2, le_4 3) + location (entirely_polar 1, crosses_polar 2, gt_50_midline_or_between 3); anterior a|p|x 0 points; hilar suffix h boolean 0 points; Kutikov 2009 R.E.N.A.L. Nephrometry; sum 4-12; no published complexity bands"
}
},
"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": [
"radius",
"exophytic",
"nearness",
"anterior",
"location",
"hilar"
],
"properties": {
"hilar": {
"type": "boolean",
"description": "Caller-assigned hilar suffix (Kutikov 2009). true means the mass abuts the main renal artery or vein (suffix h). Boolean, not points. magent does not read CT."
},
"radius": {
"enum": [
"le_4",
"gt_4_lt_7",
"ge_7"
],
"type": "string",
"description": "Caller-assigned maximal diameter in cm (Kutikov 2009 R, radius). le_4 (≤4 cm) scores 1; gt_4_lt_7 (>4 but <7 cm) scores 2; ge_7 (≥7 cm) scores 3. magent does not measure diameter or read CT."
},
"anterior": {
"enum": [
"a",
"p",
"x"
],
"type": "string",
"description": "Caller-assigned anterior/posterior descriptor (Kutikov 2009 A). a (anterior), p (posterior), or x (indeterminate). 0 points; echoed as anterior. magent does not read CT."
},
"location": {
"enum": [
"entirely_polar",
"crosses_polar",
"gt_50_midline_or_between"
],
"type": "string",
"description": "Caller-assigned location relative to polar lines (Kutikov 2009 L). entirely_polar (entirely above the upper polar line or entirely below the lower polar line) scores 1; crosses_polar (mass crosses a polar line) scores 2; gt_50_midline_or_between (>50% of the mass is across a polar line, or the mass crosses the axial renal midline, or the mass is entirely between the polar lines) scores 3. magent does not read CT."
},
"nearness": {
"enum": [
"ge_7",
"gt_4_lt_7",
"le_4"
],
"type": "string",
"description": "Caller-assigned nearness of the deepest portion of the mass to the collecting system or sinus in mm (Kutikov 2009 N). ge_7 (≥7 mm) scores 1; gt_4_lt_7 (>4 but <7 mm) scores 2; le_4 (≤4 mm) scores 3. magent does not measure nearness or read CT."
},
"exophytic": {
"enum": [
"ge_50",
"lt_50",
"entirely_endophytic"
],
"type": "string",
"description": "Caller-assigned exophytic/endophytic properties (Kutikov 2009 E). ge_50 (≥50% exophytic) scores 1; lt_50 (<50% exophytic) scores 2; entirely_endophytic (completely endophytic) scores 3. magent does not read CT."
}
}
}
},
"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/renal_nephrometry",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"hilar": false,
"radius": "le_4",
"anterior": "a",
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50"
},
{
"hilar": false,
"radius": "le_4",
"anterior": "a",
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50"
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/renal_nephrometry",
"count": 2,
"items": [
{
"e": 1,
"l": 1,
"n": 1,
"r": 1,
"hilar": false,
"score": 4,
"radius": "le_4",
"formula": "renal_nephrometry",
"anterior": "a",
"citation": {
"id": "kutikov-2009",
"doi": "10.1016/j.juro.2009.05.035",
"pmid": "19616235",
"title": "The R.E.N.A.L. Nephrometry Score: A Comprehensive Standardized System for Quantitating Renal Tumor Size, Location and Depth",
"source": "J Urol. 2009;182(3):844-853",
"authors": "Kutikov A, Uzzo RG"
},
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50",
"max_score": 12,
"components": [
{
"value": "le_4",
"factor": "radius",
"points": 1,
"present": true
},
{
"value": "ge_50",
"factor": "exophytic",
"points": 1,
"present": true
},
{
"value": "ge_7",
"factor": "nearness",
"points": 1,
"present": true
},
{
"value": "entirely_polar",
"factor": "location",
"points": 1,
"present": true
}
],
"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.",
"renal_string": "4a",
"formula_expression": "RENAL = radius (le_4 1, gt_4_lt_7 2, ge_7 3) + exophytic (ge_50 1, lt_50 2, entirely_endophytic 3) + nearness (ge_7 1, gt_4_lt_7 2, le_4 3) + location (entirely_polar 1, crosses_polar 2, gt_50_midline_or_between 3); anterior a|p|x 0 points; hilar suffix h boolean 0 points; Kutikov 2009 R.E.N.A.L. Nephrometry; sum 4-12; no published complexity bands"
},
{
"e": 1,
"l": 1,
"n": 1,
"r": 1,
"hilar": false,
"score": 4,
"radius": "le_4",
"formula": "renal_nephrometry",
"anterior": "a",
"citation": {
"id": "kutikov-2009",
"doi": "10.1016/j.juro.2009.05.035",
"pmid": "19616235",
"title": "The R.E.N.A.L. Nephrometry Score: A Comprehensive Standardized System for Quantitating Renal Tumor Size, Location and Depth",
"source": "J Urol. 2009;182(3):844-853",
"authors": "Kutikov A, Uzzo RG"
},
"location": "entirely_polar",
"nearness": "ge_7",
"exophytic": "ge_50",
"max_score": 12,
"components": [
{
"value": "le_4",
"factor": "radius",
"points": 1,
"present": true
},
{
"value": "ge_50",
"factor": "exophytic",
"points": 1,
"present": true
},
{
"value": "ge_7",
"factor": "nearness",
"points": 1,
"present": true
},
{
"value": "entirely_polar",
"factor": "location",
"points": 1,
"present": true
}
],
"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.",
"renal_string": "4a",
"formula_expression": "RENAL = radius (le_4 1, gt_4_lt_7 2, ge_7 3) + exophytic (ge_50 1, lt_50 2, entirely_endophytic 3) + nearness (ge_7 1, gt_4_lt_7 2, le_4 3) + location (entirely_polar 1, crosses_polar 2, gt_50_midline_or_between 3); anterior a|p|x 0 points; hilar suffix h boolean 0 points; Kutikov 2009 R.E.N.A.L. Nephrometry; sum 4-12; no published complexity bands"
}
]
}
},
"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": [
"radius",
"exophytic",
"nearness",
"anterior",
"location",
"hilar"
],
"properties": {
"hilar": {
"type": "boolean",
"description": "Caller-assigned hilar suffix (Kutikov 2009). true means the mass abuts the main renal artery or vein (suffix h). Boolean, not points. magent does not read CT."
},
"radius": {
"enum": [
"le_4",
"gt_4_lt_7",
"ge_7"
],
"type": "string",
"description": "Caller-assigned maximal diameter in cm (Kutikov 2009 R, radius). le_4 (≤4 cm) scores 1; gt_4_lt_7 (>4 but <7 cm) scores 2; ge_7 (≥7 cm) scores 3. magent does not measure diameter or read CT."
},
"anterior": {
"enum": [
"a",
"p",
"x"
],
"type": "string",
"description": "Caller-assigned anterior/posterior descriptor (Kutikov 2009 A). a (anterior), p (posterior), or x (indeterminate). 0 points; echoed as anterior. magent does not read CT."
},
"location": {
"enum": [
"entirely_polar",
"crosses_polar",
"gt_50_midline_or_between"
],
"type": "string",
"description": "Caller-assigned location relative to polar lines (Kutikov 2009 L). entirely_polar (entirely above the upper polar line or entirely below the lower polar line) scores 1; crosses_polar (mass crosses a polar line) scores 2; gt_50_midline_or_between (>50% of the mass is across a polar line, or the mass crosses the axial renal midline, or the mass is entirely between the polar lines) scores 3. magent does not read CT."
},
"nearness": {
"enum": [
"ge_7",
"gt_4_lt_7",
"le_4"
],
"type": "string",
"description": "Caller-assigned nearness of the deepest portion of the mass to the collecting system or sinus in mm (Kutikov 2009 N). ge_7 (≥7 mm) scores 1; gt_4_lt_7 (>4 but <7 mm) scores 2; le_4 (≤4 mm) scores 3. magent does not measure nearness or read CT."
},
"exophytic": {
"enum": [
"ge_50",
"lt_50",
"entirely_endophytic"
],
"type": "string",
"description": "Caller-assigned exophytic/endophytic properties (Kutikov 2009 E). ge_50 (≥50% exophytic) scores 1; lt_50 (<50% exophytic) scores 2; entirely_endophytic (completely endophytic) scores 3. magent does not read CT."
}
}
},
"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 12:59Z
- Last indexed by Roundhouse
- 2026-09-07 08:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 08:15Z
- 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. 10 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/renal_nephrometry, 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.