magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
DataLiveeip155:8453Exactvia cdp
RopePfoStrokeNeurologyCalculator
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 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.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:38Z
—
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/rope",
"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/rope",
"tags": [
"rope",
"pfo",
"stroke",
"neurology",
"calculator"
],
"mimeType": "application/json",
"description": "ROPE (Risk of Paradoxical Embolism; Kent 2013 Neurology Table 4) from age decades (18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0) plus five caller-assigned 1-point factors (no hypertension, no diabetes, no prior stroke/TIA, nonsmoker, cortical infarct). Score 0-10 with abstract groupings 0-3, 4-8 residual, and 9-10. Not a PFO diagnosis, not a closure indication, not PASCAL. magent does not read imaging or a smoking history.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 70,
"nonsmoker": false,
"no_diabetes": false,
"no_hypertension": false,
"cortical_infarct": false,
"no_prior_stroke_tia": false
}
},
"output": {
"type": "json",
"example": {
"score": 0,
"formula": "rope",
"citation": {
"id": "kent-2013",
"doi": "10.1212/WNL.0b013e3182a08d59",
"pmid": "23864310",
"title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke",
"source": "Neurology. 2013;81(7):619-625",
"authors": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE"
},
"age_years": 70,
"max_score": 10,
"components": [
{
"value": 70,
"factor": "age",
"points": 0,
"present": false
},
{
"factor": "no_hypertension",
"points": 0,
"present": false
},
{
"factor": "no_diabetes",
"points": 0,
"present": false
},
{
"factor": "no_prior_stroke_tia",
"points": 0,
"present": false
},
{
"factor": "nonsmoker",
"points": 0,
"present": false
},
{
"factor": "cortical_infarct",
"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.",
"rope_stratum": "0_to_3",
"formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 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": [
"age",
"no_hypertension",
"no_diabetes",
"no_prior_stroke_tia",
"nonsmoker",
"cortical_infarct"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (18-120). Kent 2013 Table 4: 18-29 scores 5; 30-39 scores 4; 40-49 scores 3; 50-59 scores 2; 60-69 scores 1; 70 or older scores 0."
},
"nonsmoker": {
"type": "boolean",
"description": "Nonsmoker (Kent 2013). Caller-assigned. magent does not read a smoking history. true scores 1; false scores 0."
},
"no_diabetes": {
"type": "boolean",
"description": "Absence of diabetes (Kent 2013). Caller-assigned. true scores 1; false scores 0."
},
"no_hypertension": {
"type": "boolean",
"description": "Absence of hypertension (Kent 2013). Caller-assigned. true scores 1; false scores 0."
},
"cortical_infarct": {
"type": "boolean",
"description": "Cortical infarct on imaging (Kent 2013). Caller-assigned. magent does not read imaging. true scores 1; false scores 0."
},
"no_prior_stroke_tia": {
"type": "boolean",
"description": "Absence of prior stroke or TIA (Kent 2013). Caller-assigned. true scores 1; false scores 0."
}
}
}
},
"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/rope",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 70,
"nonsmoker": false,
"no_diabetes": false,
"no_hypertension": false,
"cortical_infarct": false,
"no_prior_stroke_tia": false
},
{
"age": 70,
"nonsmoker": false,
"no_diabetes": false,
"no_hypertension": false,
"cortical_infarct": false,
"no_prior_stroke_tia": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/rope",
"count": 2,
"items": [
{
"score": 0,
"formula": "rope",
"citation": {
"id": "kent-2013",
"doi": "10.1212/WNL.0b013e3182a08d59",
"pmid": "23864310",
"title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke",
"source": "Neurology. 2013;81(7):619-625",
"authors": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE"
},
"age_years": 70,
"max_score": 10,
"components": [
{
"value": 70,
"factor": "age",
"points": 0,
"present": false
},
{
"factor": "no_hypertension",
"points": 0,
"present": false
},
{
"factor": "no_diabetes",
"points": 0,
"present": false
},
{
"factor": "no_prior_stroke_tia",
"points": 0,
"present": false
},
{
"factor": "nonsmoker",
"points": 0,
"present": false
},
{
"factor": "cortical_infarct",
"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.",
"rope_stratum": "0_to_3",
"formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 10"
},
{
"score": 0,
"formula": "rope",
"citation": {
"id": "kent-2013",
"doi": "10.1212/WNL.0b013e3182a08d59",
"pmid": "23864310",
"title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke",
"source": "Neurology. 2013;81(7):619-625",
"authors": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE"
},
"age_years": 70,
"max_score": 10,
"components": [
{
"value": 70,
"factor": "age",
"points": 0,
"present": false
},
{
"factor": "no_hypertension",
"points": 0,
"present": false
},
{
"factor": "no_diabetes",
"points": 0,
"present": false
},
{
"factor": "no_prior_stroke_tia",
"points": 0,
"present": false
},
{
"factor": "nonsmoker",
"points": 0,
"present": false
},
{
"factor": "cortical_infarct",
"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.",
"rope_stratum": "0_to_3",
"formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 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": [
"age",
"no_hypertension",
"no_diabetes",
"no_prior_stroke_tia",
"nonsmoker",
"cortical_infarct"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (18-120). Kent 2013 Table 4: 18-29 scores 5; 30-39 scores 4; 40-49 scores 3; 50-59 scores 2; 60-69 scores 1; 70 or older scores 0."
},
"nonsmoker": {
"type": "boolean",
"description": "Nonsmoker (Kent 2013). Caller-assigned. magent does not read a smoking history. true scores 1; false scores 0."
},
"no_diabetes": {
"type": "boolean",
"description": "Absence of diabetes (Kent 2013). Caller-assigned. true scores 1; false scores 0."
},
"no_hypertension": {
"type": "boolean",
"description": "Absence of hypertension (Kent 2013). Caller-assigned. true scores 1; false scores 0."
},
"cortical_infarct": {
"type": "boolean",
"description": "Cortical infarct on imaging (Kent 2013). Caller-assigned. magent does not read imaging. true scores 1; false scores 0."
},
"no_prior_stroke_tia": {
"type": "boolean",
"description": "Absence of prior stroke or TIA (Kent 2013). Caller-assigned. true scores 1; false scores 0."
}
}
},
"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 13:38Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 10:15Z
- 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. 15 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/rope, 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.