magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
KawasakiKawasaki-diseaseInfectionFeverCalculator
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 13:18Z
—
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/kawasaki",
"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/kawasaki",
"tags": [
"kawasaki",
"kawasaki-disease",
"infection",
"fever",
"calculator"
],
"mimeType": "application/json",
"description": "AHA 2017 classic/complete Kawasaki disease (McCrindle). Complete when fever_days >= 4 and at least 4 of 5 principal features are true (oral mucosal changes, bilateral conjunctival injection, rash, extremity changes, cervical lymphadenopathy). Does not implement the incomplete-KD lab/echo algorithm or the 3-day clinician exception. magent does not examine the patient or read an echocardiogram. Not a medical device and not a diagnosis.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"rash": true,
"fever_days": 5,
"extremity_changes": true,
"oral_mucosal_changes": true,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
}
},
"output": {
"type": "json",
"example": {
"rash": true,
"formula": "kawasaki",
"citation": {
"id": "mccrindle-2017",
"doi": "10.1161/CIR.0000000000000484",
"pmid": "28356445",
"title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association",
"source": "Circulation. 2017;135(17):e927-e999",
"authors": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E"
},
"criteria": [
{
"met": true,
"value": 5,
"factor": "fever_days_ge_4"
},
{
"met": true,
"factor": "oral_mucosal_changes"
},
{
"met": true,
"factor": "bilateral_conjunctival_injection"
},
{
"met": true,
"factor": "rash"
},
{
"met": true,
"factor": "extremity_changes"
},
{
"met": true,
"factor": "cervical_lymphadenopathy"
},
{
"met": true,
"value": 5,
"factor": "principal_feature_count_ge_4"
}
],
"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.",
"fever_days": 5,
"classification": "complete",
"extremity_changes": true,
"formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
"oral_mucosal_changes": true,
"principal_feature_count": 5,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
}
},
"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": [
"fever_days",
"oral_mucosal_changes",
"bilateral_conjunctival_injection",
"rash",
"extremity_changes",
"cervical_lymphadenopathy"
],
"properties": {
"rash": {
"type": "boolean",
"description": "Principal feature: rash — maculopapular, diffuse erythroderma, or erythema multiforme-like (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"fever_days": {
"type": "integer",
"description": "Duration of fever in days (integer 1-30). Classic complete KD requires fever_days >= 5 with >=4 principal features; with >=4 principal features the diagnosis may be made with 4 days of fever (McCrindle 2017). The 3-day clinician exception is not this tool."
},
"extremity_changes": {
"type": "boolean",
"description": "Principal feature: erythema and edema of the hands and feet in the acute phase and/or periungual desquamation in the subacute phase (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"oral_mucosal_changes": {
"type": "boolean",
"description": "Principal feature: erythema and cracking of lips, strawberry tongue, and/or erythema of oral and pharyngeal mucosa (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"cervical_lymphadenopathy": {
"type": "boolean",
"description": "Principal feature: cervical lymphadenopathy (>=1.5 cm diameter), usually unilateral (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"bilateral_conjunctival_injection": {
"type": "boolean",
"description": "Principal feature: bilateral bulbar conjunctival injection without exudate (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
}
}
}
},
"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/kawasaki",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"rash": true,
"fever_days": 5,
"extremity_changes": true,
"oral_mucosal_changes": true,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
},
{
"rash": true,
"fever_days": 5,
"extremity_changes": true,
"oral_mucosal_changes": true,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/kawasaki",
"count": 2,
"items": [
{
"rash": true,
"formula": "kawasaki",
"citation": {
"id": "mccrindle-2017",
"doi": "10.1161/CIR.0000000000000484",
"pmid": "28356445",
"title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association",
"source": "Circulation. 2017;135(17):e927-e999",
"authors": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E"
},
"criteria": [
{
"met": true,
"value": 5,
"factor": "fever_days_ge_4"
},
{
"met": true,
"factor": "oral_mucosal_changes"
},
{
"met": true,
"factor": "bilateral_conjunctival_injection"
},
{
"met": true,
"factor": "rash"
},
{
"met": true,
"factor": "extremity_changes"
},
{
"met": true,
"factor": "cervical_lymphadenopathy"
},
{
"met": true,
"value": 5,
"factor": "principal_feature_count_ge_4"
}
],
"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.",
"fever_days": 5,
"classification": "complete",
"extremity_changes": true,
"formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
"oral_mucosal_changes": true,
"principal_feature_count": 5,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
},
{
"rash": true,
"formula": "kawasaki",
"citation": {
"id": "mccrindle-2017",
"doi": "10.1161/CIR.0000000000000484",
"pmid": "28356445",
"title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association",
"source": "Circulation. 2017;135(17):e927-e999",
"authors": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E"
},
"criteria": [
{
"met": true,
"value": 5,
"factor": "fever_days_ge_4"
},
{
"met": true,
"factor": "oral_mucosal_changes"
},
{
"met": true,
"factor": "bilateral_conjunctival_injection"
},
{
"met": true,
"factor": "rash"
},
{
"met": true,
"factor": "extremity_changes"
},
{
"met": true,
"factor": "cervical_lymphadenopathy"
},
{
"met": true,
"value": 5,
"factor": "principal_feature_count_ge_4"
}
],
"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.",
"fever_days": 5,
"classification": "complete",
"extremity_changes": true,
"formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
"oral_mucosal_changes": true,
"principal_feature_count": 5,
"cervical_lymphadenopathy": true,
"bilateral_conjunctival_injection": true
}
]
}
},
"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": [
"fever_days",
"oral_mucosal_changes",
"bilateral_conjunctival_injection",
"rash",
"extremity_changes",
"cervical_lymphadenopathy"
],
"properties": {
"rash": {
"type": "boolean",
"description": "Principal feature: rash — maculopapular, diffuse erythroderma, or erythema multiforme-like (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"fever_days": {
"type": "integer",
"description": "Duration of fever in days (integer 1-30). Classic complete KD requires fever_days >= 5 with >=4 principal features; with >=4 principal features the diagnosis may be made with 4 days of fever (McCrindle 2017). The 3-day clinician exception is not this tool."
},
"extremity_changes": {
"type": "boolean",
"description": "Principal feature: erythema and edema of the hands and feet in the acute phase and/or periungual desquamation in the subacute phase (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"oral_mucosal_changes": {
"type": "boolean",
"description": "Principal feature: erythema and cracking of lips, strawberry tongue, and/or erythema of oral and pharyngeal mucosa (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"cervical_lymphadenopathy": {
"type": "boolean",
"description": "Principal feature: cervical lymphadenopathy (>=1.5 cm diameter), usually unilateral (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
},
"bilateral_conjunctival_injection": {
"type": "boolean",
"description": "Principal feature: bilateral bulbar conjunctival injection without exudate (McCrindle 2017). true or false as assigned by the caller. 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 13:18Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 06:45Z
- 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/kawasaki, 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.