magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
HbiCrohnsHarvey-bradshawGiCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 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": [
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"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
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"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/harvey_bradshaw",
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"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
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"resource": {
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"tags": [
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"gi",
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],
"mimeType": "application/json",
"description": "Harvey and Bradshaw 1980 simple Crohn's-disease activity index (one-day; items 1-3 previous day). Well-being 0-4, abdominal pain 0-3, liquid stools (1 point each; magent clamp 0-30), abdominal mass 0-3, plus 1 per listed complication (arthralgia, uveitis, erythema nodosum, aphthous ulcers, pyoderma gangrenosum, anal fissure, new fistula, abscess). magent sums only (max 48) and does not return later remission cutoffs. Not a Crohn's diagnosis or Best 1976 CDAI. magent does not examine the patient.",
"serviceName": "magent"
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"extensions": {
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"abdominal_mass": 0,
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"output": {
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{
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{
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],
"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.",
"well_being": 0,
"new_fistula": false,
"anal_fissure": false,
"liquid_stools": 0,
"abdominal_mass": 0,
"abdominal_pain": 0,
"aphthous_ulcers": false,
"erythema_nodosum": false,
"formula_expression": "HBI = well_being + abdominal_pain + liquid_stools + abdominal_mass + 1 per listed complication; Harvey 1980 previous-day items; magent max 48 (liquid_stools clamp 0-30)",
"pyoderma_gangrenosum": false
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
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"headers": {
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},
"queryParams": {
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"abdominal_pain",
"liquid_stools",
"abdominal_mass",
"arthralgia",
"uveitis",
"erythema_nodosum",
"aphthous_ulcers",
"pyoderma_gangrenosum",
"anal_fissure",
"new_fistula",
"abscess"
],
"properties": {
"abscess": {
"type": "boolean",
"description": "Abscess present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"uveitis": {
"type": "boolean",
"description": "Uveitis present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"arthralgia": {
"type": "boolean",
"description": "Arthralgia present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"well_being": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 general well-being for the previous day (integer 0-4): 0 very well; 1 slightly below par; 2 poor; 3 very poor; 4 terrible. magent does not examine the patient."
},
"new_fistula": {
"type": "boolean",
"description": "New fistula present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"anal_fissure": {
"type": "boolean",
"description": "Anal fissure present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"liquid_stools": {
"type": "integer",
"description": "Count of liquid stools that day (Harvey 1980; 1 point per stool). Integer 0-30 is a magent clamp, not a published maximum. magent does not examine the patient."
},
"abdominal_mass": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 abdominal mass (integer 0-3): 0 none; 1 dubious; 2 definite; 3 definite and tender. magent does not examine the patient."
},
"abdominal_pain": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 abdominal pain for the previous day (integer 0-3): 0 none; 1 mild; 2 moderate; 3 severe. magent does not examine the patient."
},
"aphthous_ulcers": {
"type": "boolean",
"description": "Aphthous ulcers present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"erythema_nodosum": {
"type": "boolean",
"description": "Erythema nodosum present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"pyoderma_gangrenosum": {
"type": "boolean",
"description": "Pyoderma gangrenosum present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
}
}
}
},
"additionalProperties": false
},
"output": {
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"required": [
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"properties": {
"type": {
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"example": {
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}
}
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}
}
},
"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
[
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"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/harvey_bradshaw",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
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"uveitis": false,
"arthralgia": false,
"well_being": 0,
"new_fistula": false,
"anal_fissure": false,
"liquid_stools": 0,
"abdominal_mass": 0,
"abdominal_pain": 0,
"aphthous_ulcers": false,
"erythema_nodosum": false,
"pyoderma_gangrenosum": false
},
{
"abscess": false,
"uveitis": false,
"arthralgia": false,
"well_being": 0,
"new_fistula": false,
"anal_fissure": false,
"liquid_stools": 0,
"abdominal_mass": 0,
"abdominal_pain": 0,
"aphthous_ulcers": false,
"erythema_nodosum": false,
"pyoderma_gangrenosum": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/harvey_bradshaw",
"count": 2,
"items": [
{
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"formula": "harvey_bradshaw",
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"authors": "Harvey RF, Bradshaw JM"
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"max_score": 48,
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},
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"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.",
"well_being": 0,
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"anal_fissure": false,
"liquid_stools": 0,
"abdominal_mass": 0,
"abdominal_pain": 0,
"aphthous_ulcers": false,
"erythema_nodosum": false,
"formula_expression": "HBI = well_being + abdominal_pain + liquid_stools + abdominal_mass + 1 per listed complication; Harvey 1980 previous-day items; magent max 48 (liquid_stools clamp 0-30)",
"pyoderma_gangrenosum": false
},
{
"score": 0,
"abscess": false,
"formula": "harvey_bradshaw",
"uveitis": false,
"citation": {
"id": "harvey-bradshaw-1980",
"doi": "10.1016/s0140-6736(80)92767-1",
"pmid": "6102236",
"title": "A simple index of Crohn's-disease activity",
"source": "Lancet. 1980;1(8167):514",
"authors": "Harvey RF, Bradshaw JM"
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"max_score": 48,
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"components": [
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"factor": "well_being",
"points": 0,
"present": true
},
{
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"factor": "abdominal_pain",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "liquid_stools",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "abdominal_mass",
"points": 0,
"present": true
},
{
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"points": 0,
"present": false
},
{
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"present": false
},
{
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"points": 0,
"present": false
},
{
"factor": "aphthous_ulcers",
"points": 0,
"present": false
},
{
"factor": "pyoderma_gangrenosum",
"points": 0,
"present": false
},
{
"factor": "anal_fissure",
"points": 0,
"present": false
},
{
"factor": "new_fistula",
"points": 0,
"present": false
},
{
"factor": "abscess",
"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.",
"well_being": 0,
"new_fistula": false,
"anal_fissure": false,
"liquid_stools": 0,
"abdominal_mass": 0,
"abdominal_pain": 0,
"aphthous_ulcers": false,
"erythema_nodosum": false,
"formula_expression": "HBI = well_being + abdominal_pain + liquid_stools + abdominal_mass + 1 per listed complication; Harvey 1980 previous-day items; magent max 48 (liquid_stools clamp 0-30)",
"pyoderma_gangrenosum": false
}
]
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
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"required": [
"type",
"method"
],
"properties": {
"body": {
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"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"well_being",
"abdominal_pain",
"liquid_stools",
"abdominal_mass",
"arthralgia",
"uveitis",
"erythema_nodosum",
"aphthous_ulcers",
"pyoderma_gangrenosum",
"anal_fissure",
"new_fistula",
"abscess"
],
"properties": {
"abscess": {
"type": "boolean",
"description": "Abscess present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"uveitis": {
"type": "boolean",
"description": "Uveitis present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"arthralgia": {
"type": "boolean",
"description": "Arthralgia present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"well_being": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 general well-being for the previous day (integer 0-4): 0 very well; 1 slightly below par; 2 poor; 3 very poor; 4 terrible. magent does not examine the patient."
},
"new_fistula": {
"type": "boolean",
"description": "New fistula present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"anal_fissure": {
"type": "boolean",
"description": "Anal fissure present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"liquid_stools": {
"type": "integer",
"description": "Count of liquid stools that day (Harvey 1980; 1 point per stool). Integer 0-30 is a magent clamp, not a published maximum. magent does not examine the patient."
},
"abdominal_mass": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 abdominal mass (integer 0-3): 0 none; 1 dubious; 2 definite; 3 definite and tender. magent does not examine the patient."
},
"abdominal_pain": {
"type": "integer",
"description": "Caller-assigned Harvey 1980 abdominal pain for the previous day (integer 0-3): 0 none; 1 mild; 2 moderate; 3 severe. magent does not examine the patient."
},
"aphthous_ulcers": {
"type": "boolean",
"description": "Aphthous ulcers present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"erythema_nodosum": {
"type": "boolean",
"description": "Erythema nodosum present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
},
"pyoderma_gangrenosum": {
"type": "boolean",
"description": "Pyoderma gangrenosum present (Harvey 1980 complications as used for the simple index). true or false. 1 point if true. magent does not examine the patient."
}
}
},
"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)
- 2026-09-11 20:16Z
- 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. 12 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/harvey_bradshaw, 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.