magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
Stone-scoreUreteral-stoneEmergencyUrologyCalculator
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 05:21Z
—
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/stone_score",
"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/stone_score",
"tags": [
"stone-score",
"ureteral-stone",
"emergency",
"urology",
"calculator"
],
"mimeType": "application/json",
"description": "Moore 2014 STONE score for ED prediction of uncomplicated ureteral stone. Table 3 integer points: sex female 0 male 2; timing gt_24h 0, 6_to_24h 1, lt_6h 3; origin black 0, nonblack 3 (caller-assigned as used in Moore 2014; magent does not assign race); nausea none 0, nausea_alone 1, vomiting 2; hematuria absent 0, present 3. Sum 0-13; 0-5 low, 6-9 moderate, 10-13 high. Not a CT order or stone diagnosis. Not S.T.O.N.E. nephrolithometry.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"sex": "male",
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"hematuria": true
}
},
"output": {
"type": "json",
"example": {
"sex": "male",
"score": 13,
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"formula": "stone_score",
"citation": {
"id": "moore-2014-stone",
"doi": "10.1136/bmj.g2191",
"pmid": "24671981",
"title": "Derivation and validation of a clinical prediction rule for uncomplicated ureteral stone—the STONE score: retrospective and prospective observational cohort studies",
"source": "BMJ. 2014;348:g2191",
"authors": "Moore CL, Bomann S, Daniels B, Luty S, Molinaro A, Singh D, Gross CP"
},
"hematuria": true,
"max_score": 13,
"components": [
{
"value": "male",
"factor": "sex",
"points": 2,
"present": true
},
{
"value": "lt_6h",
"factor": "timing",
"points": 3,
"present": true
},
{
"value": "nonblack",
"factor": "origin",
"points": 3,
"present": true
},
{
"value": "vomiting",
"factor": "nausea",
"points": 2,
"present": true
},
{
"factor": "hematuria",
"points": 3,
"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.",
"probability": "high",
"formula_expression": "STONE = sex (female 0, male 2) + timing (gt_24h 0, 6_to_24h 1, lt_6h 3) + origin (black 0, nonblack 3) + nausea (none 0, nausea_alone 1, vomiting 2) + hematuria (absent 0, present 3); Moore 2014 Table 3; sum 0-13; 0-5 low, 6-9 moderate, 10-13 high",
"derivation_stone_percent": 89.6
}
},
"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",
"timing",
"origin",
"nausea",
"hematuria"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Caller-assigned sex (Moore 2014 Table 3). female scores 0; male scores 2. magent does not assign sex."
},
"nausea": {
"enum": [
"none",
"nausea_alone",
"vomiting"
],
"type": "string",
"description": "Caller-assigned nausea (Moore 2014 Table 3). none scores 0; nausea_alone scores 1; vomiting scores 2 (Table 3 vomiting alone). If vomiting is present use vomiting even if nausea is also present. magent does not take a history."
},
"origin": {
"enum": [
"black",
"nonblack"
],
"type": "string",
"description": "Caller-assigned origin as used in Moore 2014 Table 3 (Race: Black 0, Non-black 3). black scores 0; nonblack scores 3. magent does not assign race."
},
"timing": {
"enum": [
"gt_24h",
"6_to_24h",
"lt_6h"
],
"type": "string",
"description": "Caller-assigned duration of pain to presentation (Moore 2014 Table 3). gt_24h scores 0; 6_to_24h scores 1; lt_6h scores 3. magent does not timestamp onset."
},
"hematuria": {
"type": "boolean",
"description": "Caller-assigned erythrocytes / hematuria on urine dipstick (Moore 2014 Table 3). false (absent) scores 0; true (present) scores 3. Binary dipstick as in Table 3, not graded RBC counts. magent does not read a dipstick."
}
}
}
},
"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/stone_score",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"sex": "male",
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"hematuria": true
},
{
"sex": "male",
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"hematuria": true
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/stone_score",
"count": 2,
"items": [
{
"sex": "male",
"score": 13,
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"formula": "stone_score",
"citation": {
"id": "moore-2014-stone",
"doi": "10.1136/bmj.g2191",
"pmid": "24671981",
"title": "Derivation and validation of a clinical prediction rule for uncomplicated ureteral stone—the STONE score: retrospective and prospective observational cohort studies",
"source": "BMJ. 2014;348:g2191",
"authors": "Moore CL, Bomann S, Daniels B, Luty S, Molinaro A, Singh D, Gross CP"
},
"hematuria": true,
"max_score": 13,
"components": [
{
"value": "male",
"factor": "sex",
"points": 2,
"present": true
},
{
"value": "lt_6h",
"factor": "timing",
"points": 3,
"present": true
},
{
"value": "nonblack",
"factor": "origin",
"points": 3,
"present": true
},
{
"value": "vomiting",
"factor": "nausea",
"points": 2,
"present": true
},
{
"factor": "hematuria",
"points": 3,
"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.",
"probability": "high",
"formula_expression": "STONE = sex (female 0, male 2) + timing (gt_24h 0, 6_to_24h 1, lt_6h 3) + origin (black 0, nonblack 3) + nausea (none 0, nausea_alone 1, vomiting 2) + hematuria (absent 0, present 3); Moore 2014 Table 3; sum 0-13; 0-5 low, 6-9 moderate, 10-13 high",
"derivation_stone_percent": 89.6
},
{
"sex": "male",
"score": 13,
"nausea": "vomiting",
"origin": "nonblack",
"timing": "lt_6h",
"formula": "stone_score",
"citation": {
"id": "moore-2014-stone",
"doi": "10.1136/bmj.g2191",
"pmid": "24671981",
"title": "Derivation and validation of a clinical prediction rule for uncomplicated ureteral stone—the STONE score: retrospective and prospective observational cohort studies",
"source": "BMJ. 2014;348:g2191",
"authors": "Moore CL, Bomann S, Daniels B, Luty S, Molinaro A, Singh D, Gross CP"
},
"hematuria": true,
"max_score": 13,
"components": [
{
"value": "male",
"factor": "sex",
"points": 2,
"present": true
},
{
"value": "lt_6h",
"factor": "timing",
"points": 3,
"present": true
},
{
"value": "nonblack",
"factor": "origin",
"points": 3,
"present": true
},
{
"value": "vomiting",
"factor": "nausea",
"points": 2,
"present": true
},
{
"factor": "hematuria",
"points": 3,
"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.",
"probability": "high",
"formula_expression": "STONE = sex (female 0, male 2) + timing (gt_24h 0, 6_to_24h 1, lt_6h 3) + origin (black 0, nonblack 3) + nausea (none 0, nausea_alone 1, vomiting 2) + hematuria (absent 0, present 3); Moore 2014 Table 3; sum 0-13; 0-5 low, 6-9 moderate, 10-13 high",
"derivation_stone_percent": 89.6
}
]
}
},
"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",
"timing",
"origin",
"nausea",
"hematuria"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Caller-assigned sex (Moore 2014 Table 3). female scores 0; male scores 2. magent does not assign sex."
},
"nausea": {
"enum": [
"none",
"nausea_alone",
"vomiting"
],
"type": "string",
"description": "Caller-assigned nausea (Moore 2014 Table 3). none scores 0; nausea_alone scores 1; vomiting scores 2 (Table 3 vomiting alone). If vomiting is present use vomiting even if nausea is also present. magent does not take a history."
},
"origin": {
"enum": [
"black",
"nonblack"
],
"type": "string",
"description": "Caller-assigned origin as used in Moore 2014 Table 3 (Race: Black 0, Non-black 3). black scores 0; nonblack scores 3. magent does not assign race."
},
"timing": {
"enum": [
"gt_24h",
"6_to_24h",
"lt_6h"
],
"type": "string",
"description": "Caller-assigned duration of pain to presentation (Moore 2014 Table 3). gt_24h scores 0; 6_to_24h scores 1; lt_6h scores 3. magent does not timestamp onset."
},
"hematuria": {
"type": "boolean",
"description": "Caller-assigned erythrocytes / hematuria on urine dipstick (Moore 2014 Table 3). false (absent) scores 0; true (present) scores 3. Binary dipstick as in Table 3, not graded RBC counts. magent does not read a dipstick."
}
}
},
"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
- 2026-09-03 05:21Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 21:46Z
- 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/stone_score, 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.