magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
Covid-gramCovid-19Critical-illnessInfectionCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 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 2026-09-04 05:51Z
—
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/cgram",
"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/cgram",
"tags": [
"covid-gram",
"covid-19",
"critical-illness",
"infection",
"calculator"
],
"mimeType": "application/json",
"description": "Liang 2020 COVID-GRAM logistic probability of critical illness (ICU, invasive ventilation, or death) among hospitalized COVID-19 from age, caller-assigned chest radiograph abnormality, hemoptysis, dyspnea, unconsciousness, comorbidity count, cancer history, neutrophil-to-lymphocyte ratio, LDH (U/L), and direct bilirubin (umol/L). Table 3 coefficients. magent does not read the film or count comorbidities. Not a diagnosis or ICU-allocation order.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 30,
"nlr": 2,
"dyspnea": false,
"ldh_u_l": 150,
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0
}
},
"output": {
"type": "json",
"example": {
"age": 30,
"nlr": 2,
"logit": -4.8995,
"dyspnea": false,
"formula": "covid_gram",
"ldh_u_l": 150,
"citation": {
"id": "liang-2020-covid-gram",
"doi": "10.1001/jamainternmed.2020.2033",
"pmid": "32396163",
"title": "Development and Validation of a Clinical Risk Score to Predict the Occurrence of Critical Illness in Hospitalized Patients With COVID-19",
"source": "JAMA Intern Med. 2020;180(8):1081-1089",
"authors": "Liang W, Liang H, Ou L, Chen B, Chen A, Li C, et al."
},
"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.",
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"formula_expression": "lp = 1.2205*chest_xray_abnormal + 0.0276*age + 1.5116*hemoptysis + 0.632*dyspnea + 1.5494*unconsciousness + 0.4668*number_of_comorbidities + 1.4037*cancer_history + 0.0562*nlr + 0.0024*ldh_u_l + 0.1376*direct_bilirubin_umol_l - 6.6127; probability = exp(lp)/(1+exp(lp)); Liang 2020 Table 3 logistic (printed ORs; intercept -6.6127 matches constant 0.001); critical illness = ICU, invasive ventilation, or death; LDH U/L; direct bilirubin umol/L; magent does not read the chest film or count comorbidities; Liang 2020 did not publish low/medium/high cutoffs",
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0,
"estimated_probability_percent": 0.7
}
},
"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",
"chest_xray_abnormal",
"hemoptysis",
"dyspnea",
"unconsciousness",
"number_of_comorbidities",
"cancer_history",
"nlr",
"ldh_u_l",
"direct_bilirubin_umol_l"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 1-120). Liang 2020 Table 3: +0.0276 per year (OR 1.03 per year). Development cohort ages 1-95."
},
"nlr": {
"type": "number",
"description": "Neutrophil-to-lymphocyte ratio (0.01-200). Liang 2020 Table 3: +0.0562 per unit (OR 1.06). Caller assigns the ratio; magent does not compute it from counts."
},
"dyspnea": {
"type": "boolean",
"description": "Dyspnea (shortness of breath) as assigned by the caller (true or false). Liang 2020 Table 3: true adds 0.632 (OR 1.88)."
},
"ldh_u_l": {
"type": "number",
"description": "Lactate dehydrogenase in U/L (1-5000). Liang 2020 Table 3: +0.0024 per U/L (OR 1.002). magent does not convert other LDH units."
},
"hemoptysis": {
"type": "boolean",
"description": "Hemoptysis as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.5116 (OR 4.53)."
},
"cancer_history": {
"type": "boolean",
"description": "Cancer history as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.4037 (OR 4.07), separate from the comorbidity count."
},
"unconsciousness": {
"type": "boolean",
"description": "Unconsciousness as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.5494 (OR 4.71)."
},
"chest_xray_abnormal": {
"type": "boolean",
"description": "Chest radiograph abnormality as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.2205 (OR 3.39). magent does not read the film."
},
"direct_bilirubin_umol_l": {
"type": "number",
"description": "Direct bilirubin in umol/L (0-200). Liang 2020 Table 3: +0.1376 per umol/L (OR 1.15). magent does not convert mg/dL."
},
"number_of_comorbidities": {
"type": "integer",
"description": "Caller-assigned count of comorbidities as Liang 2020 defined (integer 0-10): COPD, diabetes, hypertension, cardiovascular disease, cerebrovascular disease, hepatitis B, cancer, chronic kidney disease, immunodeficiency. Table 3: +0.4668 per comorbidity (OR 1.60). magent does not count diagnoses."
}
}
}
},
"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/cgram",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 30,
"nlr": 2,
"dyspnea": false,
"ldh_u_l": 150,
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0
},
{
"age": 30,
"nlr": 2,
"dyspnea": false,
"ldh_u_l": 150,
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/cgram",
"count": 2,
"items": [
{
"age": 30,
"nlr": 2,
"logit": -4.8995,
"dyspnea": false,
"formula": "covid_gram",
"ldh_u_l": 150,
"citation": {
"id": "liang-2020-covid-gram",
"doi": "10.1001/jamainternmed.2020.2033",
"pmid": "32396163",
"title": "Development and Validation of a Clinical Risk Score to Predict the Occurrence of Critical Illness in Hospitalized Patients With COVID-19",
"source": "JAMA Intern Med. 2020;180(8):1081-1089",
"authors": "Liang W, Liang H, Ou L, Chen B, Chen A, Li C, et al."
},
"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.",
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"formula_expression": "lp = 1.2205*chest_xray_abnormal + 0.0276*age + 1.5116*hemoptysis + 0.632*dyspnea + 1.5494*unconsciousness + 0.4668*number_of_comorbidities + 1.4037*cancer_history + 0.0562*nlr + 0.0024*ldh_u_l + 0.1376*direct_bilirubin_umol_l - 6.6127; probability = exp(lp)/(1+exp(lp)); Liang 2020 Table 3 logistic (printed ORs; intercept -6.6127 matches constant 0.001); critical illness = ICU, invasive ventilation, or death; LDH U/L; direct bilirubin umol/L; magent does not read the chest film or count comorbidities; Liang 2020 did not publish low/medium/high cutoffs",
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0,
"estimated_probability_percent": 0.7
},
{
"age": 30,
"nlr": 2,
"logit": -4.8995,
"dyspnea": false,
"formula": "covid_gram",
"ldh_u_l": 150,
"citation": {
"id": "liang-2020-covid-gram",
"doi": "10.1001/jamainternmed.2020.2033",
"pmid": "32396163",
"title": "Development and Validation of a Clinical Risk Score to Predict the Occurrence of Critical Illness in Hospitalized Patients With COVID-19",
"source": "JAMA Intern Med. 2020;180(8):1081-1089",
"authors": "Liang W, Liang H, Ou L, Chen B, Chen A, Li C, et al."
},
"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.",
"hemoptysis": false,
"cancer_history": false,
"unconsciousness": false,
"formula_expression": "lp = 1.2205*chest_xray_abnormal + 0.0276*age + 1.5116*hemoptysis + 0.632*dyspnea + 1.5494*unconsciousness + 0.4668*number_of_comorbidities + 1.4037*cancer_history + 0.0562*nlr + 0.0024*ldh_u_l + 0.1376*direct_bilirubin_umol_l - 6.6127; probability = exp(lp)/(1+exp(lp)); Liang 2020 Table 3 logistic (printed ORs; intercept -6.6127 matches constant 0.001); critical illness = ICU, invasive ventilation, or death; LDH U/L; direct bilirubin umol/L; magent does not read the chest film or count comorbidities; Liang 2020 did not publish low/medium/high cutoffs",
"chest_xray_abnormal": false,
"direct_bilirubin_umol_l": 3,
"number_of_comorbidities": 0,
"estimated_probability_percent": 0.7
}
]
}
},
"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",
"chest_xray_abnormal",
"hemoptysis",
"dyspnea",
"unconsciousness",
"number_of_comorbidities",
"cancer_history",
"nlr",
"ldh_u_l",
"direct_bilirubin_umol_l"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 1-120). Liang 2020 Table 3: +0.0276 per year (OR 1.03 per year). Development cohort ages 1-95."
},
"nlr": {
"type": "number",
"description": "Neutrophil-to-lymphocyte ratio (0.01-200). Liang 2020 Table 3: +0.0562 per unit (OR 1.06). Caller assigns the ratio; magent does not compute it from counts."
},
"dyspnea": {
"type": "boolean",
"description": "Dyspnea (shortness of breath) as assigned by the caller (true or false). Liang 2020 Table 3: true adds 0.632 (OR 1.88)."
},
"ldh_u_l": {
"type": "number",
"description": "Lactate dehydrogenase in U/L (1-5000). Liang 2020 Table 3: +0.0024 per U/L (OR 1.002). magent does not convert other LDH units."
},
"hemoptysis": {
"type": "boolean",
"description": "Hemoptysis as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.5116 (OR 4.53)."
},
"cancer_history": {
"type": "boolean",
"description": "Cancer history as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.4037 (OR 4.07), separate from the comorbidity count."
},
"unconsciousness": {
"type": "boolean",
"description": "Unconsciousness as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.5494 (OR 4.71)."
},
"chest_xray_abnormal": {
"type": "boolean",
"description": "Chest radiograph abnormality as assigned by the caller (true or false). Liang 2020 Table 3: true adds 1.2205 (OR 3.39). magent does not read the film."
},
"direct_bilirubin_umol_l": {
"type": "number",
"description": "Direct bilirubin in umol/L (0-200). Liang 2020 Table 3: +0.1376 per umol/L (OR 1.15). magent does not convert mg/dL."
},
"number_of_comorbidities": {
"type": "integer",
"description": "Caller-assigned count of comorbidities as Liang 2020 defined (integer 0-10): COPD, diabetes, hypertension, cardiovascular disease, cerebrovascular disease, hepatitis B, cancer, chronic kidney disease, immunodeficiency. Table 3: +0.4668 per comorbidity (OR 1.60). magent does not count diagnoses."
}
}
},
"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
- 2026-09-04 05:51Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 13:15Z
- 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. 5 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/cgram, 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.