magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
SearchLiveeip155:8453Exactvia cdp
CasparPsoriatic-arthritisClassificationEmergencyCalculator
Calls · 30d
1→ 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:30Z
—
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/caspar",
"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/caspar",
"tags": [
"caspar",
"psoriatic-arthritis",
"classification",
"emergency",
"calculator"
],
"mimeType": "application/json",
"description": "Taylor 2006 CASPAR classification criteria for psoriatic arthritis. Required: inflammatory_articular_disease true (joint, spine, or enthesis). Score: current psoriasis 2; personal history 1 only if current is false; family history 1 only if current and personal are false; nail dystrophy 1; RF-negative 1; dactylitis (current or history) 1; juxtaarticular new bone 1. Classified iff score ≥3 (max 8). Not a diagnosis. Not Moll and Wright. magent does not examine skin or read films.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"dactylitis": true,
"nail_dystrophy": false,
"current_psoriasis": true,
"juxtaarticular_new_bone": false,
"family_history_psoriasis": false,
"personal_history_psoriasis": false,
"rheumatoid_factor_negative": true,
"inflammatory_articular_disease": true
}
},
"output": {
"type": "json",
"example": {
"band": "classified",
"score": 4,
"formula": "caspar",
"citation": {
"id": "taylor-2006",
"doi": "10.1002/art.21972",
"pmid": "16871531",
"title": "Classification criteria for psoriatic arthritis: development of new criteria from a large international study",
"source": "Arthritis Rheum. 2006;54(8):2665-2673",
"authors": "Taylor W, Gladman D, Helliwell P, Marchesoni A, Mease P, Mielants H, CASPAR Study Group"
},
"max_score": 8,
"classified": true,
"components": [
{
"factor": "current_psoriasis",
"points": 2,
"present": true
},
{
"factor": "personal_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "family_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "nail_dystrophy",
"points": 0,
"present": false
},
{
"factor": "rheumatoid_factor_negative",
"points": 1,
"present": true
},
{
"factor": "dactylitis",
"points": 1,
"present": true
},
{
"factor": "juxtaarticular_new_bone",
"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.",
"formula_expression": "Taylor 2006 CASPAR: required inflammatory_articular_disease true (established inflammatory articular disease of joint, spine, or enthesis; else do not score). Score = current_psoriasis 2 + personal_history_psoriasis 1 (only if current_psoriasis false) + family_history_psoriasis 1 (only if current_psoriasis false and personal_history_psoriasis false) + nail_dystrophy 1 + rheumatoid_factor_negative 1 + dactylitis 1 + juxtaarticular_new_bone 1; max 8; classified iff score ≥3. Not a diagnosis. Not Moll and Wright"
}
},
"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": [
"inflammatory_articular_disease",
"current_psoriasis",
"personal_history_psoriasis",
"family_history_psoriasis",
"nail_dystrophy",
"rheumatoid_factor_negative",
"dactylitis",
"juxtaarticular_new_bone"
],
"properties": {
"dactylitis": {
"type": "boolean",
"description": "Current swelling of an entire digit, or a history of dactylitis recorded by a rheumatologist, as assigned by the caller (Taylor 2006). true scores 1. magent does not examine digits."
},
"nail_dystrophy": {
"type": "boolean",
"description": "Typical psoriatic nail dystrophy including onycholysis, pitting, and hyperkeratosis on current examination, as assigned by the caller (Taylor 2006). true scores 1. magent does not examine nails."
},
"current_psoriasis": {
"type": "boolean",
"description": "Current psoriasis as assigned by the caller (Taylor 2006): psoriatic skin or scalp disease present today as judged by a rheumatologist or dermatologist. true scores 2. When true, personal_history_psoriasis and family_history_psoriasis do not add. magent does not examine skin."
},
"juxtaarticular_new_bone": {
"type": "boolean",
"description": "Radiographic ill-defined ossification near joint margins, excluding osteophyte formation, on plain radiographs of the hand or foot, as assigned by the caller (Taylor 2006). true scores 1. magent does not read films."
},
"family_history_psoriasis": {
"type": "boolean",
"description": "Family history of psoriasis as assigned by the caller (Taylor 2006): first- or second-degree relative according to patient report. true scores 1 only if current_psoriasis is false and personal_history_psoriasis is false. magent does not take a pedigree."
},
"personal_history_psoriasis": {
"type": "boolean",
"description": "Personal history of psoriasis as assigned by the caller (Taylor 2006): a history that may be obtained from the patient, family physician, dermatologist, rheumatologist, or other qualified health care provider. true scores 1 only if current_psoriasis is false. magent does not examine skin."
},
"rheumatoid_factor_negative": {
"type": "boolean",
"description": "Negative rheumatoid factor by any method except latex, preferably ELISA or nephelometry according to the local laboratory reference range, as assigned by the caller (Taylor 2006). true scores 1. magent does not assay rheumatoid factor."
},
"inflammatory_articular_disease": {
"type": "boolean",
"description": "Must be true. Taylor 2006 CASPAR entry: established inflammatory articular disease of joint, spine, or enthesis as assigned by the caller. false is invalid and is not classified=false. magent does not examine joints."
}
}
}
},
"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/caspar",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"dactylitis": true,
"nail_dystrophy": false,
"current_psoriasis": true,
"juxtaarticular_new_bone": false,
"family_history_psoriasis": false,
"personal_history_psoriasis": false,
"rheumatoid_factor_negative": true,
"inflammatory_articular_disease": true
},
{
"dactylitis": true,
"nail_dystrophy": false,
"current_psoriasis": true,
"juxtaarticular_new_bone": false,
"family_history_psoriasis": false,
"personal_history_psoriasis": false,
"rheumatoid_factor_negative": true,
"inflammatory_articular_disease": true
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/caspar",
"count": 2,
"items": [
{
"band": "classified",
"score": 4,
"formula": "caspar",
"citation": {
"id": "taylor-2006",
"doi": "10.1002/art.21972",
"pmid": "16871531",
"title": "Classification criteria for psoriatic arthritis: development of new criteria from a large international study",
"source": "Arthritis Rheum. 2006;54(8):2665-2673",
"authors": "Taylor W, Gladman D, Helliwell P, Marchesoni A, Mease P, Mielants H, CASPAR Study Group"
},
"max_score": 8,
"classified": true,
"components": [
{
"factor": "current_psoriasis",
"points": 2,
"present": true
},
{
"factor": "personal_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "family_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "nail_dystrophy",
"points": 0,
"present": false
},
{
"factor": "rheumatoid_factor_negative",
"points": 1,
"present": true
},
{
"factor": "dactylitis",
"points": 1,
"present": true
},
{
"factor": "juxtaarticular_new_bone",
"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.",
"formula_expression": "Taylor 2006 CASPAR: required inflammatory_articular_disease true (established inflammatory articular disease of joint, spine, or enthesis; else do not score). Score = current_psoriasis 2 + personal_history_psoriasis 1 (only if current_psoriasis false) + family_history_psoriasis 1 (only if current_psoriasis false and personal_history_psoriasis false) + nail_dystrophy 1 + rheumatoid_factor_negative 1 + dactylitis 1 + juxtaarticular_new_bone 1; max 8; classified iff score ≥3. Not a diagnosis. Not Moll and Wright"
},
{
"band": "classified",
"score": 4,
"formula": "caspar",
"citation": {
"id": "taylor-2006",
"doi": "10.1002/art.21972",
"pmid": "16871531",
"title": "Classification criteria for psoriatic arthritis: development of new criteria from a large international study",
"source": "Arthritis Rheum. 2006;54(8):2665-2673",
"authors": "Taylor W, Gladman D, Helliwell P, Marchesoni A, Mease P, Mielants H, CASPAR Study Group"
},
"max_score": 8,
"classified": true,
"components": [
{
"factor": "current_psoriasis",
"points": 2,
"present": true
},
{
"factor": "personal_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "family_history_psoriasis",
"points": 0,
"present": false
},
{
"factor": "nail_dystrophy",
"points": 0,
"present": false
},
{
"factor": "rheumatoid_factor_negative",
"points": 1,
"present": true
},
{
"factor": "dactylitis",
"points": 1,
"present": true
},
{
"factor": "juxtaarticular_new_bone",
"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.",
"formula_expression": "Taylor 2006 CASPAR: required inflammatory_articular_disease true (established inflammatory articular disease of joint, spine, or enthesis; else do not score). Score = current_psoriasis 2 + personal_history_psoriasis 1 (only if current_psoriasis false) + family_history_psoriasis 1 (only if current_psoriasis false and personal_history_psoriasis false) + nail_dystrophy 1 + rheumatoid_factor_negative 1 + dactylitis 1 + juxtaarticular_new_bone 1; max 8; classified iff score ≥3. Not a diagnosis. Not Moll and Wright"
}
]
}
},
"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": [
"inflammatory_articular_disease",
"current_psoriasis",
"personal_history_psoriasis",
"family_history_psoriasis",
"nail_dystrophy",
"rheumatoid_factor_negative",
"dactylitis",
"juxtaarticular_new_bone"
],
"properties": {
"dactylitis": {
"type": "boolean",
"description": "Current swelling of an entire digit, or a history of dactylitis recorded by a rheumatologist, as assigned by the caller (Taylor 2006). true scores 1. magent does not examine digits."
},
"nail_dystrophy": {
"type": "boolean",
"description": "Typical psoriatic nail dystrophy including onycholysis, pitting, and hyperkeratosis on current examination, as assigned by the caller (Taylor 2006). true scores 1. magent does not examine nails."
},
"current_psoriasis": {
"type": "boolean",
"description": "Current psoriasis as assigned by the caller (Taylor 2006): psoriatic skin or scalp disease present today as judged by a rheumatologist or dermatologist. true scores 2. When true, personal_history_psoriasis and family_history_psoriasis do not add. magent does not examine skin."
},
"juxtaarticular_new_bone": {
"type": "boolean",
"description": "Radiographic ill-defined ossification near joint margins, excluding osteophyte formation, on plain radiographs of the hand or foot, as assigned by the caller (Taylor 2006). true scores 1. magent does not read films."
},
"family_history_psoriasis": {
"type": "boolean",
"description": "Family history of psoriasis as assigned by the caller (Taylor 2006): first- or second-degree relative according to patient report. true scores 1 only if current_psoriasis is false and personal_history_psoriasis is false. magent does not take a pedigree."
},
"personal_history_psoriasis": {
"type": "boolean",
"description": "Personal history of psoriasis as assigned by the caller (Taylor 2006): a history that may be obtained from the patient, family physician, dermatologist, rheumatologist, or other qualified health care provider. true scores 1 only if current_psoriasis is false. magent does not examine skin."
},
"rheumatoid_factor_negative": {
"type": "boolean",
"description": "Negative rheumatoid factor by any method except latex, preferably ELISA or nephelometry according to the local laboratory reference range, as assigned by the caller (Taylor 2006). true scores 1. magent does not assay rheumatoid factor."
},
"inflammatory_articular_disease": {
"type": "boolean",
"description": "Must be true. Taylor 2006 CASPAR entry: established inflammatory articular disease of joint, spine, or enthesis as assigned by the caller. false is invalid and is not classified=false. magent does not examine joints."
}
}
},
"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 13:30Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 13:15Z
- 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/caspar, 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.