magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
CrashChemotherapyToxicityGeriatricOncology
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 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 2026-09-01 23:29Z
—
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.
{
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"accepts": [
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"resource": {
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"tags": [
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"chemotherapy",
"toxicity",
"geriatric",
"oncology"
],
"mimeType": "application/json",
"description": "Extermann 2012 CRASH chemotherapy toxicity score (not trauma CRASH): diastolic BP, IADL, LDH versus ULN, caller-assigned MAX2 Chemotox, ECOG, Mini-Mental Status, Mini-Nutritional Assessment. Hematologic 0–6, nonhematologic 0–8, combined 0–12 counting Chemotox once. Four-level low/medium_low/medium_high/high bands with derivation incidences. Not a chemotherapy order and not CARG-TT. magent does not look up regimens.",
"serviceName": "magent"
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"extensions": {
"bazaar": {
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"queryParams": {
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"mna": 26,
"ecog": 1,
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"chemotox": 0.5,
"ldh_uln_u_l": 618,
"diastolic_mm_hg": 80
}
},
"output": {
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"example": {
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"mna": 26,
"ecog": 1,
"iadl": 20,
"formula": "crash",
"ldh_u_l": 500,
"chemotox": 0.5,
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"pmid": "22072065",
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{
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{
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"factor": "chemotox",
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"present": true
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{
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"present": true
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"factor": "mms",
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"present": true
},
{
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"factor": "mna",
"points": 2,
"present": true
}
],
"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.",
"ldh_uln_u_l": 618,
"combined_risk": "high",
"combined_score": 10,
"diastolic_mm_hg": 80,
"hematologic_risk": "medium_high",
"hematologic_score": 5,
"formula_expression": "CRASH (Extermann 2012 Table 4) hematologic = diastolic_mm_hg (<=72 0, >72 1) + iadl (26-29 0, 10-25 1) + ldh (ldh_u_l > 0.74 * ldh_uln_u_l 2 else 0; empty 1-point column) + chemotox (0-0.44 0, 0.45-0.57 1, >0.57 2); max 6; nonhematologic = ecog (0 → 0, 1-2 → 1, 3-4 → 2) + mms (30 → 0, <30 → 2) + mna (28-30 → 0, <28 → 2) + chemotox (same); max 8; combined = hematologic + nonhematologic - chemotox (count Chemotox once; max 12 not 14); H 0-1 low 7%, 2-3 medium_low 23%, 4-5 medium_high 54%, 6 high 100%; NH 0-2 low 33%, 3-4 medium_low 46%, 5-6 medium_high 67%, 7-8 high 93%; combined 0-3 low 50%, 4-6 medium_low 58%, 7-9 medium_high 77%, 10-12 high 79%; not trauma CRASH; not CARG-TT; Chemotox is caller-assigned MAX2",
"max_combined_score": 12,
"nonhematologic_risk": "medium_high",
"nonhematologic_score": 6,
"max_hematologic_score": 6,
"max_nonhematologic_score": 8,
"combined_incidence_percent": 79,
"hematologic_incidence_percent": 54,
"nonhematologic_incidence_percent": 67
}
},
"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": [
"diastolic_mm_hg",
"iadl",
"ldh_u_l",
"ldh_uln_u_l",
"chemotox",
"ecog",
"mms",
"mna"
],
"properties": {
"mms": {
"type": "integer",
"description": "Mini-Mental Status integer 0-30. Extermann 2012: 30 → 0, <30 → 2 nonhematologic points. magent does not administer the Mini-Mental Status."
},
"mna": {
"type": "integer",
"description": "Mini-Nutritional Assessment integer 0-30. Extermann 2012: 28-30 → 0, <28 → 2 nonhematologic points. magent does not administer the Mini-Nutritional Assessment."
},
"ecog": {
"type": "integer",
"description": "ECOG performance status integer 0-4. Extermann 2012: 0 → 0, 1-2 → 1, 3-4 → 2 nonhematologic points. magent does not assign performance status."
},
"iadl": {
"type": "integer",
"description": "Instrumental activities of daily living integer 10-29 (Extermann 2012 CRASH IADL). 26-29 → 0, 10-25 → 1 hematologic point. magent does not interview the patient."
},
"ldh_u_l": {
"type": "number",
"description": "Lactate dehydrogenase in U/L (1-20000). +2 hematologic points if ldh_u_l > 0.74 × ldh_uln_u_l, else 0 (empty 1-point column). magent does not assay LDH."
},
"chemotox": {
"type": "number",
"description": "Caller-assigned MAX2 Chemotox from 0 to 1. 0-0.44 → 0, 0.45-0.57 → 1, >0.57 → 2. Counted once in the combined score. magent does not look up regimens."
},
"ldh_uln_u_l": {
"type": "number",
"description": "Laboratory LDH upper limit of normal in U/L (50-2000). Used only as 0.74 × ULN for the LDH rule. No special-case ULN value. magent does not assay LDH."
},
"diastolic_mm_hg": {
"type": "number",
"description": "Diastolic blood pressure in mm Hg (20-160). Extermann 2012 Table 4: ≤72 → 0, >72 → 1 hematologic point. magent does not measure blood pressure."
}
}
}
},
"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
[
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"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
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"bazaar": {
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"input": {
"body": {
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"mna": 26,
"ecog": 1,
"iadl": 20,
"ldh_u_l": 500,
"chemotox": 0.5,
"ldh_uln_u_l": 618,
"diastolic_mm_hg": 80
},
{
"mms": 28,
"mna": 26,
"ecog": 1,
"iadl": 20,
"ldh_u_l": 500,
"chemotox": 0.5,
"ldh_uln_u_l": 618,
"diastolic_mm_hg": 80
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/crash",
"count": 2,
"items": [
{
"mms": 28,
"mna": 26,
"ecog": 1,
"iadl": 20,
"formula": "crash",
"ldh_u_l": 500,
"chemotox": 0.5,
"citation": {
"id": "extermann-2012",
"doi": "10.1002/cncr.26646",
"pmid": "22072065",
"title": "Predicting the risk of chemotherapy toxicity in older patients: the Chemotherapy Risk Assessment Scale for High-Age Patients (CRASH) score",
"source": "Cancer. 2012;118(13):3377-3386",
"authors": "Extermann M, Boler I, Reich RR, et al."
},
"components": [
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"value": 80,
"factor": "diastolic_mm_hg",
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"present": true
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{
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"factor": "iadl",
"points": 1,
"present": true
},
{
"value": 500,
"factor": "ldh",
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"present": true
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{
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"factor": "chemotox",
"points": 1,
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"points": 1,
"present": true
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"value": 28,
"factor": "mms",
"points": 2,
"present": true
},
{
"value": 26,
"factor": "mna",
"points": 2,
"present": true
}
],
"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.",
"ldh_uln_u_l": 618,
"combined_risk": "high",
"combined_score": 10,
"diastolic_mm_hg": 80,
"hematologic_risk": "medium_high",
"hematologic_score": 5,
"formula_expression": "CRASH (Extermann 2012 Table 4) hematologic = diastolic_mm_hg (<=72 0, >72 1) + iadl (26-29 0, 10-25 1) + ldh (ldh_u_l > 0.74 * ldh_uln_u_l 2 else 0; empty 1-point column) + chemotox (0-0.44 0, 0.45-0.57 1, >0.57 2); max 6; nonhematologic = ecog (0 → 0, 1-2 → 1, 3-4 → 2) + mms (30 → 0, <30 → 2) + mna (28-30 → 0, <28 → 2) + chemotox (same); max 8; combined = hematologic + nonhematologic - chemotox (count Chemotox once; max 12 not 14); H 0-1 low 7%, 2-3 medium_low 23%, 4-5 medium_high 54%, 6 high 100%; NH 0-2 low 33%, 3-4 medium_low 46%, 5-6 medium_high 67%, 7-8 high 93%; combined 0-3 low 50%, 4-6 medium_low 58%, 7-9 medium_high 77%, 10-12 high 79%; not trauma CRASH; not CARG-TT; Chemotox is caller-assigned MAX2",
"max_combined_score": 12,
"nonhematologic_risk": "medium_high",
"nonhematologic_score": 6,
"max_hematologic_score": 6,
"max_nonhematologic_score": 8,
"combined_incidence_percent": 79,
"hematologic_incidence_percent": 54,
"nonhematologic_incidence_percent": 67
},
{
"mms": 28,
"mna": 26,
"ecog": 1,
"iadl": 20,
"formula": "crash",
"ldh_u_l": 500,
"chemotox": 0.5,
"citation": {
"id": "extermann-2012",
"doi": "10.1002/cncr.26646",
"pmid": "22072065",
"title": "Predicting the risk of chemotherapy toxicity in older patients: the Chemotherapy Risk Assessment Scale for High-Age Patients (CRASH) score",
"source": "Cancer. 2012;118(13):3377-3386",
"authors": "Extermann M, Boler I, Reich RR, et al."
},
"components": [
{
"value": 80,
"factor": "diastolic_mm_hg",
"points": 1,
"present": true
},
{
"value": 20,
"factor": "iadl",
"points": 1,
"present": true
},
{
"value": 500,
"factor": "ldh",
"points": 2,
"present": true
},
{
"value": 0.5,
"factor": "chemotox",
"points": 1,
"present": true
},
{
"value": 1,
"factor": "ecog",
"points": 1,
"present": true
},
{
"value": 28,
"factor": "mms",
"points": 2,
"present": true
},
{
"value": 26,
"factor": "mna",
"points": 2,
"present": true
}
],
"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.",
"ldh_uln_u_l": 618,
"combined_risk": "high",
"combined_score": 10,
"diastolic_mm_hg": 80,
"hematologic_risk": "medium_high",
"hematologic_score": 5,
"formula_expression": "CRASH (Extermann 2012 Table 4) hematologic = diastolic_mm_hg (<=72 0, >72 1) + iadl (26-29 0, 10-25 1) + ldh (ldh_u_l > 0.74 * ldh_uln_u_l 2 else 0; empty 1-point column) + chemotox (0-0.44 0, 0.45-0.57 1, >0.57 2); max 6; nonhematologic = ecog (0 → 0, 1-2 → 1, 3-4 → 2) + mms (30 → 0, <30 → 2) + mna (28-30 → 0, <28 → 2) + chemotox (same); max 8; combined = hematologic + nonhematologic - chemotox (count Chemotox once; max 12 not 14); H 0-1 low 7%, 2-3 medium_low 23%, 4-5 medium_high 54%, 6 high 100%; NH 0-2 low 33%, 3-4 medium_low 46%, 5-6 medium_high 67%, 7-8 high 93%; combined 0-3 low 50%, 4-6 medium_low 58%, 7-9 medium_high 77%, 10-12 high 79%; not trauma CRASH; not CARG-TT; Chemotox is caller-assigned MAX2",
"max_combined_score": 12,
"nonhematologic_risk": "medium_high",
"nonhematologic_score": 6,
"max_hematologic_score": 6,
"max_nonhematologic_score": 8,
"combined_incidence_percent": 79,
"hematologic_incidence_percent": 54,
"nonhematologic_incidence_percent": 67
}
]
}
},
"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": [
"diastolic_mm_hg",
"iadl",
"ldh_u_l",
"ldh_uln_u_l",
"chemotox",
"ecog",
"mms",
"mna"
],
"properties": {
"mms": {
"type": "integer",
"description": "Mini-Mental Status integer 0-30. Extermann 2012: 30 → 0, <30 → 2 nonhematologic points. magent does not administer the Mini-Mental Status."
},
"mna": {
"type": "integer",
"description": "Mini-Nutritional Assessment integer 0-30. Extermann 2012: 28-30 → 0, <28 → 2 nonhematologic points. magent does not administer the Mini-Nutritional Assessment."
},
"ecog": {
"type": "integer",
"description": "ECOG performance status integer 0-4. Extermann 2012: 0 → 0, 1-2 → 1, 3-4 → 2 nonhematologic points. magent does not assign performance status."
},
"iadl": {
"type": "integer",
"description": "Instrumental activities of daily living integer 10-29 (Extermann 2012 CRASH IADL). 26-29 → 0, 10-25 → 1 hematologic point. magent does not interview the patient."
},
"ldh_u_l": {
"type": "number",
"description": "Lactate dehydrogenase in U/L (1-20000). +2 hematologic points if ldh_u_l > 0.74 × ldh_uln_u_l, else 0 (empty 1-point column). magent does not assay LDH."
},
"chemotox": {
"type": "number",
"description": "Caller-assigned MAX2 Chemotox from 0 to 1. 0-0.44 → 0, 0.45-0.57 → 1, >0.57 → 2. Counted once in the combined score. magent does not look up regimens."
},
"ldh_uln_u_l": {
"type": "number",
"description": "Laboratory LDH upper limit of normal in U/L (50-2000). Used only as 0.74 × ULN for the LDH rule. No special-case ULN value. magent does not assay LDH."
},
"diastolic_mm_hg": {
"type": "number",
"description": "Diastolic blood pressure in mm Hg (20-160). Extermann 2012 Table 4: ≤72 → 0, >72 → 1 hematologic point. magent does not measure blood pressure."
}
}
},
"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
- 2026-09-01 23:29Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 14:46Z
- 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. 8 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/crash, 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.