magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Mediaofflineeip155:8453Exactvia cdp
Delta-pLemsSclcNeurologyCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 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 13:38Z
—
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/delta_p",
"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/delta_p",
"tags": [
"delta-p",
"lems",
"sclc",
"neurology",
"calculator"
],
"mimeType": "application/json",
"description": "Titulaer 2011 DELTA-P for SCLC association in Lambert-Eaton myasthenic syndrome. One point each, at or within 3 months of LEMS onset: bulbar weakness (dysarthria/dysphagia/chewing/neck weakness); erectile dysfunction if male (always 0 if female); weight loss ≥5%; smoking at onset; age ≥50; Karnofsky <70. Max 6. Bands low 0-1, intermediate 2, high 3-6. Published SCLC percents for scores 0, 1, 3-6; none for score 2. Not a LEMS diagnosis, not SOX1, and not an SCLC screen.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 40,
"sex": "female",
"kps_lt_70": false,
"bulbar_weakness": false,
"smoking_at_onset": false,
"weight_loss_ge_5pct": false,
"erectile_dysfunction": false
}
},
"output": {
"type": "json",
"example": {
"sex": "female",
"score": 0,
"formula": "delta_p",
"citation": {
"id": "titulaer-2011",
"doi": "10.1200/JCO.2010.32.0440",
"pmid": "21245427",
"title": "Clinical Dutch-English Lambert-Eaton Myasthenic Syndrome (LEMS) Tumor Association Prediction Score Accurately Predicts Small-Cell Lung Cancer in the LEMS",
"source": "J Clin Oncol. 2011;29(7):902-908",
"authors": "Titulaer MJ, Maddison P, Sont JK, Wirtz PW, Hilton-Jones D, Klooster R, Willcox N, Potman M, Sillevis Smitt PAE, Kuks JBM, Roep BO, Vincent A, van der Maarel SM, van Dijk JG, Lang B, Verschuuren JJGM"
},
"age_years": 40,
"max_score": 6,
"sclc_band": "low",
"components": [
{
"factor": "bulbar_weakness",
"points": 0,
"present": false
},
{
"factor": "erectile_dysfunction",
"points": 0,
"present": false
},
{
"factor": "weight_loss_ge_5pct",
"points": 0,
"present": false
},
{
"factor": "smoking_at_onset",
"points": 0,
"present": false
},
{
"value": 40,
"factor": "age_ge_50",
"points": 0,
"present": false
},
{
"factor": "kps_lt_70",
"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.",
"sclc_percent": 0,
"formula_expression": "DELTA-P = bulbar_weakness 1 + (male and erectile_dysfunction) 1 + weight_loss_ge_5pct 1 + smoking_at_onset 1 + (age>=50) 1 + kps_lt_70 1; each at or within 3 months of LEMS onset; female erectile always 0; max 6; bands 0-1 low / 2 intermediate / 3-6 high (Titulaer 2011); SCLC percents 0/2.6/omit/83.9/93.5/96.6/100 for scores 0-6"
}
},
"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": [
"sex",
"age",
"bulbar_weakness",
"weight_loss_ge_5pct",
"smoking_at_onset",
"kps_lt_70"
],
"properties": {
"age": {
"type": "integer",
"description": "Age at LEMS onset in years (18-120). ≥50 scores 1; 49 does not (Titulaer 2011)."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male. Erectile dysfunction scores only when male. Female erectile is always 0 (Titulaer 2011: Female | 0)."
},
"kps_lt_70": {
"type": "boolean",
"description": "Karnofsky Performance Status 0-60 (KPS <70) at or within 3 months of LEMS onset (Titulaer 2011 P). Caller-assigned flag; magent does not compute Karnofsky. true or false. 1 point if true."
},
"bulbar_weakness": {
"type": "boolean",
"description": "Dysarthria, dysphagia, chewing difficulty, or neck weakness at or within 3 months of LEMS onset (Titulaer 2011 D). true or false. Caller-assigned. 1 point if true."
},
"smoking_at_onset": {
"type": "boolean",
"description": "Smoking at LEMS onset (Titulaer 2011 T). true or false. Caller-assigned. 1 point if true."
},
"weight_loss_ge_5pct": {
"type": "boolean",
"description": "Weight loss ≥5% at or within 3 months of LEMS onset (Titulaer 2011 L). true or false. Caller-assigned. 1 point if true."
},
"erectile_dysfunction": {
"type": "boolean",
"description": "Erectile dysfunction at or within 3 months of LEMS onset (Titulaer 2011 E). Required when sex is male (true scores 1). When female, this item is always 0, including if omitted, false, or true. true or false."
}
}
}
},
"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/delta_p",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 40,
"sex": "female",
"kps_lt_70": false,
"bulbar_weakness": false,
"smoking_at_onset": false,
"weight_loss_ge_5pct": false,
"erectile_dysfunction": false
},
{
"age": 40,
"sex": "female",
"kps_lt_70": false,
"bulbar_weakness": false,
"smoking_at_onset": false,
"weight_loss_ge_5pct": false,
"erectile_dysfunction": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/delta_p",
"count": 2,
"items": [
{
"sex": "female",
"score": 0,
"formula": "delta_p",
"citation": {
"id": "titulaer-2011",
"doi": "10.1200/JCO.2010.32.0440",
"pmid": "21245427",
"title": "Clinical Dutch-English Lambert-Eaton Myasthenic Syndrome (LEMS) Tumor Association Prediction Score Accurately Predicts Small-Cell Lung Cancer in the LEMS",
"source": "J Clin Oncol. 2011;29(7):902-908",
"authors": "Titulaer MJ, Maddison P, Sont JK, Wirtz PW, Hilton-Jones D, Klooster R, Willcox N, Potman M, Sillevis Smitt PAE, Kuks JBM, Roep BO, Vincent A, van der Maarel SM, van Dijk JG, Lang B, Verschuuren JJGM"
},
"age_years": 40,
"max_score": 6,
"sclc_band": "low",
"components": [
{
"factor": "bulbar_weakness",
"points": 0,
"present": false
},
{
"factor": "erectile_dysfunction",
"points": 0,
"present": false
},
{
"factor": "weight_loss_ge_5pct",
"points": 0,
"present": false
},
{
"factor": "smoking_at_onset",
"points": 0,
"present": false
},
{
"value": 40,
"factor": "age_ge_50",
"points": 0,
"present": false
},
{
"factor": "kps_lt_70",
"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.",
"sclc_percent": 0,
"formula_expression": "DELTA-P = bulbar_weakness 1 + (male and erectile_dysfunction) 1 + weight_loss_ge_5pct 1 + smoking_at_onset 1 + (age>=50) 1 + kps_lt_70 1; each at or within 3 months of LEMS onset; female erectile always 0; max 6; bands 0-1 low / 2 intermediate / 3-6 high (Titulaer 2011); SCLC percents 0/2.6/omit/83.9/93.5/96.6/100 for scores 0-6"
},
{
"sex": "female",
"score": 0,
"formula": "delta_p",
"citation": {
"id": "titulaer-2011",
"doi": "10.1200/JCO.2010.32.0440",
"pmid": "21245427",
"title": "Clinical Dutch-English Lambert-Eaton Myasthenic Syndrome (LEMS) Tumor Association Prediction Score Accurately Predicts Small-Cell Lung Cancer in the LEMS",
"source": "J Clin Oncol. 2011;29(7):902-908",
"authors": "Titulaer MJ, Maddison P, Sont JK, Wirtz PW, Hilton-Jones D, Klooster R, Willcox N, Potman M, Sillevis Smitt PAE, Kuks JBM, Roep BO, Vincent A, van der Maarel SM, van Dijk JG, Lang B, Verschuuren JJGM"
},
"age_years": 40,
"max_score": 6,
"sclc_band": "low",
"components": [
{
"factor": "bulbar_weakness",
"points": 0,
"present": false
},
{
"factor": "erectile_dysfunction",
"points": 0,
"present": false
},
{
"factor": "weight_loss_ge_5pct",
"points": 0,
"present": false
},
{
"factor": "smoking_at_onset",
"points": 0,
"present": false
},
{
"value": 40,
"factor": "age_ge_50",
"points": 0,
"present": false
},
{
"factor": "kps_lt_70",
"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.",
"sclc_percent": 0,
"formula_expression": "DELTA-P = bulbar_weakness 1 + (male and erectile_dysfunction) 1 + weight_loss_ge_5pct 1 + smoking_at_onset 1 + (age>=50) 1 + kps_lt_70 1; each at or within 3 months of LEMS onset; female erectile always 0; max 6; bands 0-1 low / 2 intermediate / 3-6 high (Titulaer 2011); SCLC percents 0/2.6/omit/83.9/93.5/96.6/100 for scores 0-6"
}
]
}
},
"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": [
"sex",
"age",
"bulbar_weakness",
"weight_loss_ge_5pct",
"smoking_at_onset",
"kps_lt_70"
],
"properties": {
"age": {
"type": "integer",
"description": "Age at LEMS onset in years (18-120). ≥50 scores 1; 49 does not (Titulaer 2011)."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male. Erectile dysfunction scores only when male. Female erectile is always 0 (Titulaer 2011: Female | 0)."
},
"kps_lt_70": {
"type": "boolean",
"description": "Karnofsky Performance Status 0-60 (KPS <70) at or within 3 months of LEMS onset (Titulaer 2011 P). Caller-assigned flag; magent does not compute Karnofsky. true or false. 1 point if true."
},
"bulbar_weakness": {
"type": "boolean",
"description": "Dysarthria, dysphagia, chewing difficulty, or neck weakness at or within 3 months of LEMS onset (Titulaer 2011 D). true or false. Caller-assigned. 1 point if true."
},
"smoking_at_onset": {
"type": "boolean",
"description": "Smoking at LEMS onset (Titulaer 2011 T). true or false. Caller-assigned. 1 point if true."
},
"weight_loss_ge_5pct": {
"type": "boolean",
"description": "Weight loss ≥5% at or within 3 months of LEMS onset (Titulaer 2011 L). true or false. Caller-assigned. 1 point if true."
},
"erectile_dysfunction": {
"type": "boolean",
"description": "Erectile dysfunction at or within 3 months of LEMS onset (Titulaer 2011 E). Required when sex is male (true scores 1). When female, this item is always 0, including if omitted, false, or true. true or false."
}
}
},
"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)
- 2026-09-13 08:15Z
- 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. 13 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/delta_p, 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.