magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Mediaofflineeip155:8453Exactvia cdp
Fistula-riskPancreasWhippleGiCalculator
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 13:08Z
—
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/fistula_risk",
"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/fistula_risk",
"tags": [
"fistula-risk",
"pancreas",
"whipple",
"gi",
"calculator"
],
"mimeType": "application/json",
"description": "Callery 2013 Fistula Risk Score after pancreatoduodenectomy: gland texture firm 0 / soft 2; pathology PDAC or pancreatitis 0 / other (ampullary, duodenal, cystic, islet cell) 1; duct mm ≥5 0, ≥4 1, ≥3 2, ≥2 3, else 4; EBL mL ≤400 0, 401–700 1, 701–1000 2, >1000 3. Max 10. Bands negligible 0, low 1–2, intermediate 3–6, high 7–10. magent does not palpate the gland or measure EBL. Not a CR-POPF diagnosis, not an ISGPS grade, not Ranson or BISAP. Not a medical device.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"ebl_ml": 300,
"duct_mm": 5,
"pathology": "pdac_or_pancreatitis",
"gland_texture": "firm"
}
},
"output": {
"type": "json",
"example": {
"score": 0,
"ebl_ml": 300,
"duct_mm": 5,
"formula": "fistula_risk",
"citation": {
"id": "callery-2013",
"doi": "10.1016/j.jamcollsurg.2012.09.002",
"pmid": "23122535",
"title": "A prospectively validated clinical risk score accurately predicts pancreatic fistula after pancreatoduodenectomy.",
"source": "J Am Coll Surg. 2013;216(1):1-14",
"authors": "Callery MP, Pratt WB, Kent TS, Chaikof EL, Vollmer CM"
},
"max_score": 10,
"pathology": "pdac_or_pancreatitis",
"components": [
{
"value": "firm",
"factor": "gland_texture",
"points": 0,
"present": true
},
{
"value": "pdac_or_pancreatitis",
"factor": "pathology",
"points": 0,
"present": true
},
{
"value": 5,
"factor": "duct_mm",
"points": 0,
"present": true
},
{
"value": 300,
"factor": "ebl_ml",
"points": 0,
"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.",
"fistula_band": "negligible",
"gland_texture": "firm",
"formula_expression": "FRS = gland_texture (firm 0, soft 2) + pathology (pdac_or_pancreatitis 0, other 1) + duct_mm (>=5 0, >=4 1, >=3 2, >=2 3, else 4) + ebl_ml (<=400 0, <=700 1, <=1000 2, else 3); Callery 2013; max 10; negligible 0, low 1-2, intermediate 3-6, high 7-10"
}
},
"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": [
"gland_texture",
"pathology",
"duct_mm",
"ebl_ml"
],
"properties": {
"ebl_ml": {
"type": "number",
"description": "Caller-assigned estimated blood loss in mL, number 0–10000 (Callery 2013). ≤400 scores 0; 401–700 scores 1; 701–1000 scores 2; >1000 scores 3. magent does not measure EBL."
},
"duct_mm": {
"type": "number",
"description": "Caller-assigned pancreatic duct diameter in mm, number 0.5–20 (Callery 2013 integer-mm table). ≥5 scores 0; ≥4 scores 1; ≥3 scores 2; ≥2 scores 3; else 4 (so 4.0–4.999 scores 1; 1.5 and ≤1 score 4). magent does not measure the duct."
},
"pathology": {
"enum": [
"pdac_or_pancreatitis",
"other"
],
"type": "string",
"description": "Caller-assigned pathology (Callery 2013). pdac_or_pancreatitis (pancreatic ductal adenocarcinoma or pancreatitis) scores 0. other (ampullary, duodenal, cystic, or islet cell) scores 1."
},
"gland_texture": {
"enum": [
"firm",
"soft"
],
"type": "string",
"description": "Caller-assigned pancreatic gland texture at pancreatoduodenectomy (Callery 2013). firm or soft. firm scores 0; soft scores 2. magent does not palpate the gland."
}
}
}
},
"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/fistula_risk",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"ebl_ml": 300,
"duct_mm": 5,
"pathology": "pdac_or_pancreatitis",
"gland_texture": "firm"
},
{
"ebl_ml": 300,
"duct_mm": 5,
"pathology": "pdac_or_pancreatitis",
"gland_texture": "firm"
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/fistula_risk",
"count": 2,
"items": [
{
"score": 0,
"ebl_ml": 300,
"duct_mm": 5,
"formula": "fistula_risk",
"citation": {
"id": "callery-2013",
"doi": "10.1016/j.jamcollsurg.2012.09.002",
"pmid": "23122535",
"title": "A prospectively validated clinical risk score accurately predicts pancreatic fistula after pancreatoduodenectomy.",
"source": "J Am Coll Surg. 2013;216(1):1-14",
"authors": "Callery MP, Pratt WB, Kent TS, Chaikof EL, Vollmer CM"
},
"max_score": 10,
"pathology": "pdac_or_pancreatitis",
"components": [
{
"value": "firm",
"factor": "gland_texture",
"points": 0,
"present": true
},
{
"value": "pdac_or_pancreatitis",
"factor": "pathology",
"points": 0,
"present": true
},
{
"value": 5,
"factor": "duct_mm",
"points": 0,
"present": true
},
{
"value": 300,
"factor": "ebl_ml",
"points": 0,
"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.",
"fistula_band": "negligible",
"gland_texture": "firm",
"formula_expression": "FRS = gland_texture (firm 0, soft 2) + pathology (pdac_or_pancreatitis 0, other 1) + duct_mm (>=5 0, >=4 1, >=3 2, >=2 3, else 4) + ebl_ml (<=400 0, <=700 1, <=1000 2, else 3); Callery 2013; max 10; negligible 0, low 1-2, intermediate 3-6, high 7-10"
},
{
"score": 0,
"ebl_ml": 300,
"duct_mm": 5,
"formula": "fistula_risk",
"citation": {
"id": "callery-2013",
"doi": "10.1016/j.jamcollsurg.2012.09.002",
"pmid": "23122535",
"title": "A prospectively validated clinical risk score accurately predicts pancreatic fistula after pancreatoduodenectomy.",
"source": "J Am Coll Surg. 2013;216(1):1-14",
"authors": "Callery MP, Pratt WB, Kent TS, Chaikof EL, Vollmer CM"
},
"max_score": 10,
"pathology": "pdac_or_pancreatitis",
"components": [
{
"value": "firm",
"factor": "gland_texture",
"points": 0,
"present": true
},
{
"value": "pdac_or_pancreatitis",
"factor": "pathology",
"points": 0,
"present": true
},
{
"value": 5,
"factor": "duct_mm",
"points": 0,
"present": true
},
{
"value": 300,
"factor": "ebl_ml",
"points": 0,
"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.",
"fistula_band": "negligible",
"gland_texture": "firm",
"formula_expression": "FRS = gland_texture (firm 0, soft 2) + pathology (pdac_or_pancreatitis 0, other 1) + duct_mm (>=5 0, >=4 1, >=3 2, >=2 3, else 4) + ebl_ml (<=400 0, <=700 1, <=1000 2, else 3); Callery 2013; max 10; negligible 0, low 1-2, intermediate 3-6, high 7-10"
}
]
}
},
"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": [
"gland_texture",
"pathology",
"duct_mm",
"ebl_ml"
],
"properties": {
"ebl_ml": {
"type": "number",
"description": "Caller-assigned estimated blood loss in mL, number 0–10000 (Callery 2013). ≤400 scores 0; 401–700 scores 1; 701–1000 scores 2; >1000 scores 3. magent does not measure EBL."
},
"duct_mm": {
"type": "number",
"description": "Caller-assigned pancreatic duct diameter in mm, number 0.5–20 (Callery 2013 integer-mm table). ≥5 scores 0; ≥4 scores 1; ≥3 scores 2; ≥2 scores 3; else 4 (so 4.0–4.999 scores 1; 1.5 and ≤1 score 4). magent does not measure the duct."
},
"pathology": {
"enum": [
"pdac_or_pancreatitis",
"other"
],
"type": "string",
"description": "Caller-assigned pathology (Callery 2013). pdac_or_pancreatitis (pancreatic ductal adenocarcinoma or pancreatitis) scores 0. other (ampullary, duodenal, cystic, or islet cell) scores 1."
},
"gland_texture": {
"enum": [
"firm",
"soft"
],
"type": "string",
"description": "Caller-assigned pancreatic gland texture at pancreatoduodenectomy (Callery 2013). firm or soft. firm scores 0; soft scores 2. magent does not palpate the gland."
}
}
},
"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 13:08Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 09:15Z
- 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. 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/fistula_risk, 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.