magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
GraceAcsKillipMortalityCalculator
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 03:50Z
—
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/grace",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
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{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
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],
"resource": {
"url": "https://api.magentlab.com/api/calc/grace",
"tags": [
"grace",
"acs",
"killip",
"mortality",
"calculator"
],
"mimeType": "application/json",
"description": "Granger 2003 in-hospital GRACE 1.0: integer nomogram points from age, heart rate, systolic BP, creatinine (mg/dL or µmol/L), Killip class 1-4, cardiac arrest, ST-segment deviation, and elevated initial enzymes. Total 1-372. In-hospital mortality percent is that paper's printed score readout. Not GRACE 2.0, not Fox 2006 6-month, not ESC 108/140 cutoffs. Not a medical device and not a cath-lab order.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
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"sbp_mm_hg": 130,
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"creatinine_umol_l": 88.42
}
},
"output": {
"type": "json",
"example": {
"score": 108,
"formula": "grace",
"citation": {
"id": "granger-2003-grace",
"doi": "10.1001/archinte.163.19.2345",
"pmid": "14581255",
"title": "Predictors of hospital mortality in the global registry of acute coronary events",
"source": "Arch Intern Med. 2003;163(19):2345-2353",
"authors": "Granger CB, Goldberg RJ, Dabbous O, Pieper KS, Eagle KA, Cannon CP, Van De Werf F, Avezum A, Goodman SG, Flather MD, Fox KA; Global Registry of Acute Coronary Events Investigators"
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{
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"points": 34,
"present": true
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{
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"points": 7,
"present": true
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{
"value": 1,
"factor": "killip_class",
"points": 0,
"present": false
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{
"factor": "cardiac_arrest",
"points": 0,
"present": false
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{
"factor": "st_deviation",
"points": 0,
"present": false
},
{
"factor": "elevated_enzymes",
"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.",
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"formula_expression": "GRACE = age_points(<30:0, 30-39:8, 40-49:25, 50-59:41, 60-69:58, 70-79:75, 80-89:91, >=90:100) + heart_rate_points(<50:0, 50-69:3, 70-89:9, 90-109:15, 110-149:24, 150-199:38, >=200:46) + sbp_points(<80:58, 80-99:53, 100-119:43, 120-139:34, 140-159:24, 160-199:10, >=200:0) + creatinine_mg_dl_points(0-0.39:1, 0.4-0.79:4, 0.8-1.19:7, 1.2-1.59:10, 1.6-1.99:13, 2.0-3.99:21, >=4:28) + killip(1:0, 2:20, 3:39, 4:59) + 39 if cardiac_arrest + 28 if st_deviation + 14 if elevated_enzymes; Granger 2003 in-hospital GRACE 1.0 nomogram; max 372; in_hospital_mortality_percent is that paper's printed score readout (score<=60 → 0.2; then the labeled 70-240 percents at or below the total; score>=250 → 52); not ESC 108/140 cutoffs, not GRACE 2.0, not Fox 2006 6-month",
"in_hospital_mortality_percent": 0.8
}
},
"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",
"heart_rate_bpm",
"sbp_mm_hg",
"killip_class",
"cardiac_arrest",
"st_deviation",
"elevated_enzymes"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (18-120). Granger 2003 nomogram: <30 scores 0; 30-39 scores 8; 40-49 scores 25; 50-59 scores 41; 60-69 scores 58; 70-79 scores 75; 80-89 scores 91; ≥90 scores 100."
},
"sbp_mm_hg": {
"type": "integer",
"description": "Systolic blood pressure in mm Hg (40-300). Granger 2003 nomogram, inverse: <80 scores 58; 80-99 scores 53; 100-119 scores 43; 120-139 scores 34; 140-159 scores 24; 160-199 scores 10; ≥200 scores 0."
},
"killip_class": {
"type": "integer",
"description": "Killip class 1-4 as assigned by the caller (1 no heart failure scores 0; 2 rales or elevated venous pressure scores 20; 3 pulmonary edema scores 39; 4 cardiogenic shock scores 59). magent does not examine the patient."
},
"st_deviation": {
"type": "boolean",
"description": "ST-segment deviation on the presenting ECG as assigned by the caller (Granger 2003). true scores 28. magent does not interpret the ECG. true or false."
},
"cardiac_arrest": {
"type": "boolean",
"description": "Cardiac arrest at presentation as assigned by the caller (Granger 2003). true scores 39. magent does not read the chart. true or false."
},
"heart_rate_bpm": {
"type": "integer",
"description": "Heart rate in beats/min (20-300). Granger 2003 nomogram: <50 scores 0; 50-69 scores 3; 70-89 scores 9; 90-109 scores 15; 110-149 scores 24; 150-199 scores 38; ≥200 scores 46."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Initial serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l. If both are sent, creatinine_mg_dl is scored. Granger 2003 nomogram: 0.0-0.39 scores 1; 0.4-0.79 scores 4; 0.8-1.19 scores 7; 1.2-1.59 scores 10; 1.6-1.99 scores 13; 2.0-3.99 scores 21; ≥4.0 scores 28."
},
"elevated_enzymes": {
"type": "boolean",
"description": "Elevated initial cardiac enzymes as assigned by the caller (Granger 2003). true scores 14. magent does not read the laboratory. true or false."
},
"creatinine_umol_l": {
"type": "number",
"description": "Initial serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42. Alternate to creatinine_mg_dl. Ignored when creatinine_mg_dl is present."
}
}
}
},
"additionalProperties": false
},
"output": {
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"required": [
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"properties": {
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},
"example": {
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}
}
}
}
}
},
"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
[
{
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"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/grace",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 65,
"sbp_mm_hg": 130,
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"creatinine_umol_l": 88.42
},
{
"age": 65,
"sbp_mm_hg": 130,
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"creatinine_umol_l": 88.42
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/grace",
"count": 2,
"items": [
{
"score": 108,
"formula": "grace",
"citation": {
"id": "granger-2003-grace",
"doi": "10.1001/archinte.163.19.2345",
"pmid": "14581255",
"title": "Predictors of hospital mortality in the global registry of acute coronary events",
"source": "Arch Intern Med. 2003;163(19):2345-2353",
"authors": "Granger CB, Goldberg RJ, Dabbous O, Pieper KS, Eagle KA, Cannon CP, Van De Werf F, Avezum A, Goodman SG, Flather MD, Fox KA; Global Registry of Acute Coronary Events Investigators"
},
"age_years": 65,
"max_score": 372,
"sbp_mm_hg": 130,
"components": [
{
"value": 65,
"factor": "age",
"points": 58,
"present": true
},
{
"value": 80,
"factor": "heart_rate_bpm",
"points": 9,
"present": true
},
{
"value": 130,
"factor": "sbp_mm_hg",
"points": 34,
"present": true
},
{
"value": 1,
"factor": "creatinine_mg_dl",
"points": 7,
"present": true
},
{
"value": 1,
"factor": "killip_class",
"points": 0,
"present": false
},
{
"factor": "cardiac_arrest",
"points": 0,
"present": false
},
{
"factor": "st_deviation",
"points": 0,
"present": false
},
{
"factor": "elevated_enzymes",
"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.",
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"formula_expression": "GRACE = age_points(<30:0, 30-39:8, 40-49:25, 50-59:41, 60-69:58, 70-79:75, 80-89:91, >=90:100) + heart_rate_points(<50:0, 50-69:3, 70-89:9, 90-109:15, 110-149:24, 150-199:38, >=200:46) + sbp_points(<80:58, 80-99:53, 100-119:43, 120-139:34, 140-159:24, 160-199:10, >=200:0) + creatinine_mg_dl_points(0-0.39:1, 0.4-0.79:4, 0.8-1.19:7, 1.2-1.59:10, 1.6-1.99:13, 2.0-3.99:21, >=4:28) + killip(1:0, 2:20, 3:39, 4:59) + 39 if cardiac_arrest + 28 if st_deviation + 14 if elevated_enzymes; Granger 2003 in-hospital GRACE 1.0 nomogram; max 372; in_hospital_mortality_percent is that paper's printed score readout (score<=60 → 0.2; then the labeled 70-240 percents at or below the total; score>=250 → 52); not ESC 108/140 cutoffs, not GRACE 2.0, not Fox 2006 6-month",
"in_hospital_mortality_percent": 0.8
},
{
"score": 108,
"formula": "grace",
"citation": {
"id": "granger-2003-grace",
"doi": "10.1001/archinte.163.19.2345",
"pmid": "14581255",
"title": "Predictors of hospital mortality in the global registry of acute coronary events",
"source": "Arch Intern Med. 2003;163(19):2345-2353",
"authors": "Granger CB, Goldberg RJ, Dabbous O, Pieper KS, Eagle KA, Cannon CP, Van De Werf F, Avezum A, Goodman SG, Flather MD, Fox KA; Global Registry of Acute Coronary Events Investigators"
},
"age_years": 65,
"max_score": 372,
"sbp_mm_hg": 130,
"components": [
{
"value": 65,
"factor": "age",
"points": 58,
"present": true
},
{
"value": 80,
"factor": "heart_rate_bpm",
"points": 9,
"present": true
},
{
"value": 130,
"factor": "sbp_mm_hg",
"points": 34,
"present": true
},
{
"value": 1,
"factor": "creatinine_mg_dl",
"points": 7,
"present": true
},
{
"value": 1,
"factor": "killip_class",
"points": 0,
"present": false
},
{
"factor": "cardiac_arrest",
"points": 0,
"present": false
},
{
"factor": "st_deviation",
"points": 0,
"present": false
},
{
"factor": "elevated_enzymes",
"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.",
"killip_class": 1,
"st_deviation": false,
"cardiac_arrest": false,
"heart_rate_bpm": 80,
"creatinine_mg_dl": 1,
"elevated_enzymes": false,
"formula_expression": "GRACE = age_points(<30:0, 30-39:8, 40-49:25, 50-59:41, 60-69:58, 70-79:75, 80-89:91, >=90:100) + heart_rate_points(<50:0, 50-69:3, 70-89:9, 90-109:15, 110-149:24, 150-199:38, >=200:46) + sbp_points(<80:58, 80-99:53, 100-119:43, 120-139:34, 140-159:24, 160-199:10, >=200:0) + creatinine_mg_dl_points(0-0.39:1, 0.4-0.79:4, 0.8-1.19:7, 1.2-1.59:10, 1.6-1.99:13, 2.0-3.99:21, >=4:28) + killip(1:0, 2:20, 3:39, 4:59) + 39 if cardiac_arrest + 28 if st_deviation + 14 if elevated_enzymes; Granger 2003 in-hospital GRACE 1.0 nomogram; max 372; in_hospital_mortality_percent is that paper's printed score readout (score<=60 → 0.2; then the labeled 70-240 percents at or below the total; score>=250 → 52); not ESC 108/140 cutoffs, not GRACE 2.0, not Fox 2006 6-month",
"in_hospital_mortality_percent": 0.8
}
]
}
},
"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",
"heart_rate_bpm",
"sbp_mm_hg",
"killip_class",
"cardiac_arrest",
"st_deviation",
"elevated_enzymes"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (18-120). Granger 2003 nomogram: <30 scores 0; 30-39 scores 8; 40-49 scores 25; 50-59 scores 41; 60-69 scores 58; 70-79 scores 75; 80-89 scores 91; ≥90 scores 100."
},
"sbp_mm_hg": {
"type": "integer",
"description": "Systolic blood pressure in mm Hg (40-300). Granger 2003 nomogram, inverse: <80 scores 58; 80-99 scores 53; 100-119 scores 43; 120-139 scores 34; 140-159 scores 24; 160-199 scores 10; ≥200 scores 0."
},
"killip_class": {
"type": "integer",
"description": "Killip class 1-4 as assigned by the caller (1 no heart failure scores 0; 2 rales or elevated venous pressure scores 20; 3 pulmonary edema scores 39; 4 cardiogenic shock scores 59). magent does not examine the patient."
},
"st_deviation": {
"type": "boolean",
"description": "ST-segment deviation on the presenting ECG as assigned by the caller (Granger 2003). true scores 28. magent does not interpret the ECG. true or false."
},
"cardiac_arrest": {
"type": "boolean",
"description": "Cardiac arrest at presentation as assigned by the caller (Granger 2003). true scores 39. magent does not read the chart. true or false."
},
"heart_rate_bpm": {
"type": "integer",
"description": "Heart rate in beats/min (20-300). Granger 2003 nomogram: <50 scores 0; 50-69 scores 3; 70-89 scores 9; 90-109 scores 15; 110-149 scores 24; 150-199 scores 38; ≥200 scores 46."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Initial serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l. If both are sent, creatinine_mg_dl is scored. Granger 2003 nomogram: 0.0-0.39 scores 1; 0.4-0.79 scores 4; 0.8-1.19 scores 7; 1.2-1.59 scores 10; 1.6-1.99 scores 13; 2.0-3.99 scores 21; ≥4.0 scores 28."
},
"elevated_enzymes": {
"type": "boolean",
"description": "Elevated initial cardiac enzymes as assigned by the caller (Granger 2003). true scores 14. magent does not read the laboratory. true or false."
},
"creatinine_umol_l": {
"type": "number",
"description": "Initial serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42. Alternate to creatinine_mg_dl. Ignored when creatinine_mg_dl is present."
}
}
},
"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 03:50Z
- 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/grace, 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.