magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
Truelove-wittsUlcerative-colitisGiCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 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 13:10Z
—
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/truelove_witts",
"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/truelove_witts",
"tags": [
"truelove-witts",
"ulcerative-colitis",
"gi",
"calculator"
],
"mimeType": "application/json",
"description": "Truelove and Witts 1955 ulcerative colitis severity. severe iff stools_per_day >= 6 with macroscopic blood and at least one of fever, tachycardia, anemia, and esr_raised; mild iff stools_per_day <= 4, macroscopic_blood false, and no systemic flags; otherwise moderately_severe. Caller assigns flags from the 1955 table (fever mean evening >37.5 C or 37.8 C on 2 of 4 days; pulse >90; Hb 75% or less; ESR >30). magent does not examine the patient. Not a diagnosis, not Mayo UC, not PUCAI.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"fever": false,
"anemia": false,
"esr_raised": false,
"tachycardia": false,
"stools_per_day": 2,
"macroscopic_blood": false
}
},
"output": {
"type": "json",
"example": {
"formula": "truelove_witts",
"citation": {
"id": "truelove-witts-1955",
"doi": "10.1136/bmj.2.4947.1041",
"pmid": "13260656",
"title": "Cortisone in ulcerative colitis; final report on a therapeutic trial",
"source": "Br Med J. 1955;2(4947):1041-1048",
"authors": "Truelove SC, Witts LJ"
},
"criteria": [
{
"met": true,
"value": 2,
"factor": "stools_le_4"
},
{
"met": false,
"value": 2,
"factor": "stools_ge_6"
},
{
"met": false,
"factor": "macroscopic_blood"
},
{
"met": false,
"value": 2,
"factor": "frequent_bloody_stools"
},
{
"met": false,
"factor": "fever"
},
{
"met": false,
"factor": "tachycardia"
},
{
"met": false,
"factor": "anemia"
},
{
"met": false,
"factor": "esr_raised"
},
{
"met": true,
"value": 0,
"factor": "no_systemic"
},
{
"met": false,
"value": 0,
"factor": "systemic_ge_1"
}
],
"severity": "mild",
"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.",
"stools_per_day": 2,
"formula_expression": "severity severe iff stools_per_day >= 6 and macroscopic_blood and systemic_features_met >= 1; mild iff stools_per_day <= 4 and not macroscopic_blood and systemic_features_met == 0; else moderately_severe; systemic_features_met counts fever, tachycardia, anemia, and esr_raised (Truelove and Witts 1955)",
"systemic_features_met": 0
}
},
"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": [
"stools_per_day",
"macroscopic_blood",
"fever",
"tachycardia",
"anemia",
"esr_raised"
],
"properties": {
"fever": {
"type": "boolean",
"description": "Fever as assigned by the caller using the 1955 definition: mean evening temperature more than 99.5 F (37.5 C), or a temperature of 100 F (37.8 C) or more on at least two days out of four. true or false. magent does not measure temperature."
},
"anemia": {
"type": "boolean",
"description": "Anaemia as assigned by the caller using the 1955 definition: haemoglobin 75% or less, allowance made for recent transfusion. true or false. Not the later 10.5 g/dL restatement. magent does not measure haemoglobin."
},
"esr_raised": {
"type": "boolean",
"description": "E.S.R. much raised as assigned by the caller using the 1955 definition: more than 30 mm in one hour. true or false. magent does not measure ESR."
},
"tachycardia": {
"type": "boolean",
"description": "Tachycardia as assigned by the caller using the 1955 definition: mean pulse rate more than 90 per minute. true or false. magent does not measure pulse."
},
"stools_per_day": {
"type": "integer",
"description": "Number of stools (motions) per day as assigned by the caller (integer 0-40). The 1955 mild column is four or less; the severe column is six or more. magent does not count stools."
},
"macroscopic_blood": {
"type": "boolean",
"description": "Macroscopic blood in stools as in the 1955 severe column (with macroscopic blood). true or false as assigned by the caller. The 1955 mild column allows no more than small amounts; assign false when blood is absent or no more than small amounts. magent does not examine the stool."
}
}
}
},
"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/truelove_witts",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"fever": false,
"anemia": false,
"esr_raised": false,
"tachycardia": false,
"stools_per_day": 2,
"macroscopic_blood": false
},
{
"fever": false,
"anemia": false,
"esr_raised": false,
"tachycardia": false,
"stools_per_day": 2,
"macroscopic_blood": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/truelove_witts",
"count": 2,
"items": [
{
"formula": "truelove_witts",
"citation": {
"id": "truelove-witts-1955",
"doi": "10.1136/bmj.2.4947.1041",
"pmid": "13260656",
"title": "Cortisone in ulcerative colitis; final report on a therapeutic trial",
"source": "Br Med J. 1955;2(4947):1041-1048",
"authors": "Truelove SC, Witts LJ"
},
"criteria": [
{
"met": true,
"value": 2,
"factor": "stools_le_4"
},
{
"met": false,
"value": 2,
"factor": "stools_ge_6"
},
{
"met": false,
"factor": "macroscopic_blood"
},
{
"met": false,
"value": 2,
"factor": "frequent_bloody_stools"
},
{
"met": false,
"factor": "fever"
},
{
"met": false,
"factor": "tachycardia"
},
{
"met": false,
"factor": "anemia"
},
{
"met": false,
"factor": "esr_raised"
},
{
"met": true,
"value": 0,
"factor": "no_systemic"
},
{
"met": false,
"value": 0,
"factor": "systemic_ge_1"
}
],
"severity": "mild",
"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.",
"stools_per_day": 2,
"formula_expression": "severity severe iff stools_per_day >= 6 and macroscopic_blood and systemic_features_met >= 1; mild iff stools_per_day <= 4 and not macroscopic_blood and systemic_features_met == 0; else moderately_severe; systemic_features_met counts fever, tachycardia, anemia, and esr_raised (Truelove and Witts 1955)",
"systemic_features_met": 0
},
{
"formula": "truelove_witts",
"citation": {
"id": "truelove-witts-1955",
"doi": "10.1136/bmj.2.4947.1041",
"pmid": "13260656",
"title": "Cortisone in ulcerative colitis; final report on a therapeutic trial",
"source": "Br Med J. 1955;2(4947):1041-1048",
"authors": "Truelove SC, Witts LJ"
},
"criteria": [
{
"met": true,
"value": 2,
"factor": "stools_le_4"
},
{
"met": false,
"value": 2,
"factor": "stools_ge_6"
},
{
"met": false,
"factor": "macroscopic_blood"
},
{
"met": false,
"value": 2,
"factor": "frequent_bloody_stools"
},
{
"met": false,
"factor": "fever"
},
{
"met": false,
"factor": "tachycardia"
},
{
"met": false,
"factor": "anemia"
},
{
"met": false,
"factor": "esr_raised"
},
{
"met": true,
"value": 0,
"factor": "no_systemic"
},
{
"met": false,
"value": 0,
"factor": "systemic_ge_1"
}
],
"severity": "mild",
"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.",
"stools_per_day": 2,
"formula_expression": "severity severe iff stools_per_day >= 6 and macroscopic_blood and systemic_features_met >= 1; mild iff stools_per_day <= 4 and not macroscopic_blood and systemic_features_met == 0; else moderately_severe; systemic_features_met counts fever, tachycardia, anemia, and esr_raised (Truelove and Witts 1955)",
"systemic_features_met": 0
}
]
}
},
"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": [
"stools_per_day",
"macroscopic_blood",
"fever",
"tachycardia",
"anemia",
"esr_raised"
],
"properties": {
"fever": {
"type": "boolean",
"description": "Fever as assigned by the caller using the 1955 definition: mean evening temperature more than 99.5 F (37.5 C), or a temperature of 100 F (37.8 C) or more on at least two days out of four. true or false. magent does not measure temperature."
},
"anemia": {
"type": "boolean",
"description": "Anaemia as assigned by the caller using the 1955 definition: haemoglobin 75% or less, allowance made for recent transfusion. true or false. Not the later 10.5 g/dL restatement. magent does not measure haemoglobin."
},
"esr_raised": {
"type": "boolean",
"description": "E.S.R. much raised as assigned by the caller using the 1955 definition: more than 30 mm in one hour. true or false. magent does not measure ESR."
},
"tachycardia": {
"type": "boolean",
"description": "Tachycardia as assigned by the caller using the 1955 definition: mean pulse rate more than 90 per minute. true or false. magent does not measure pulse."
},
"stools_per_day": {
"type": "integer",
"description": "Number of stools (motions) per day as assigned by the caller (integer 0-40). The 1955 mild column is four or less; the severe column is six or more. magent does not count stools."
},
"macroscopic_blood": {
"type": "boolean",
"description": "Macroscopic blood in stools as in the 1955 severe column (with macroscopic blood). true or false as assigned by the caller. The 1955 mild column allows no more than small amounts; assign false when blood is absent or no more than small amounts. magent does not examine the stool."
}
}
},
"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 13:10Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 11:15Z
- 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. 14 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/truelove_witts, 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.