magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
DataLiveeip155:8453Exactvia cdp
VirstaEndocarditisBacteremiaSabCalculator
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 08:32Z
—
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/virsta",
"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/virsta",
"tags": [
"virsta",
"endocarditis",
"bacteremia",
"sab",
"calculator"
],
"mimeType": "application/json",
"description": "Tubiana 2016 VIRSTA from nine caller-assigned SAB flags plus CRP mg/L. Points: emboli 5, meningitis 5, device or previous IE 4 (one item), IVDU 4, native valve 3, persistent bacteremia 3, vertebral osteomyelitis 2, community/non-nosocomial 2, severe sepsis/shock 1, CRP >190 mg/L 1. Max 30. high_risk iff score ≥ 3. Not an endocarditis diagnosis.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"crp_mg_l": 50,
"meningitis": false,
"iv_drug_use": false,
"native_valve_disease": false,
"persistent_bacteremia": false,
"severe_sepsis_or_shock": false,
"vertebral_osteomyelitis": false,
"community_or_non_nosocomial": false,
"cerebral_or_peripheral_emboli": false,
"intracardiac_device_or_previous_ie": false
}
},
"output": {
"type": "json",
"example": {
"score": 0,
"formula": "virsta",
"citation": {
"id": "tubiana-2016",
"doi": "10.1016/j.jinf.2016.02.003",
"pmid": "26916042",
"title": "The VIRSTA score, a prediction score to estimate risk of infective endocarditis and determine priority for echocardiography in patients with Staphylococcus aureus bacteremia",
"source": "J Infect. 2016;72(5):544-553",
"authors": "Tubiana S, Duval X, Alla F, Selton-Suty C, Tattevin P, Delahaye F, Piroth L, Chirouze C, Lavigne JP, Erpelding ML, Hoen B, Vandenesch F, Iung B, Le Moing V"
},
"crp_mg_l": 50,
"high_risk": false,
"max_score": 30,
"components": [
{
"factor": "cerebral_or_peripheral_emboli",
"points": 0,
"present": false
},
{
"factor": "meningitis",
"points": 0,
"present": false
},
{
"factor": "intracardiac_device_or_previous_ie",
"points": 0,
"present": false
},
{
"factor": "iv_drug_use",
"points": 0,
"present": false
},
{
"factor": "native_valve_disease",
"points": 0,
"present": false
},
{
"factor": "persistent_bacteremia",
"points": 0,
"present": false
},
{
"factor": "vertebral_osteomyelitis",
"points": 0,
"present": false
},
{
"factor": "community_or_non_nosocomial",
"points": 0,
"present": false
},
{
"factor": "severe_sepsis_or_shock",
"points": 0,
"present": false
},
{
"value": 50,
"factor": "crp_gt_190",
"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.",
"formula_expression": "VIRSTA = cerebral_or_peripheral_emboli (5 if present) + meningitis (5) + intracardiac_device_or_previous_ie (4) + iv_drug_use (4) + native_valve_disease (3) + persistent_bacteremia (3) + vertebral_osteomyelitis (2) + community_or_non_nosocomial (2) + severe_sepsis_or_shock (1) + (crp_mg_l > 190 → 1); Tubiana 2016 caller-assigned items; CRP cutoff is above 190 mg/L (not ≥190); intracardiac device or previous IE is one 4-point item; max 30; high_risk iff score ≥ 3"
}
},
"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": [
"cerebral_or_peripheral_emboli",
"meningitis",
"intracardiac_device_or_previous_ie",
"iv_drug_use",
"native_valve_disease",
"persistent_bacteremia",
"vertebral_osteomyelitis",
"community_or_non_nosocomial",
"severe_sepsis_or_shock",
"crp_mg_l"
],
"properties": {
"crp_mg_l": {
"type": "number",
"description": "C-reactive protein in mg/L (0-500). Tubiana 2016 scores 1 if CRP is above 190 mg/L (not ≥190). magent does not assay CRP."
},
"meningitis": {
"type": "boolean",
"description": "Caller-assigned meningitis (Tubiana 2016). true scores 5. magent does not diagnose meningitis or endocarditis."
},
"iv_drug_use": {
"type": "boolean",
"description": "Caller-assigned intravenous drug use (Tubiana 2016). true scores 4. magent does not take a social history."
},
"native_valve_disease": {
"type": "boolean",
"description": "Caller-assigned preexisting native valve disease (Tubiana 2016). true scores 3. magent does not diagnose valve disease."
},
"persistent_bacteremia": {
"type": "boolean",
"description": "H48-persistent bacteremia (positive blood culture after 48 hours) as assigned by the caller (Tubiana 2016). true scores 3. magent does not interpret cultures."
},
"severe_sepsis_or_shock": {
"type": "boolean",
"description": "Caller-assigned severe sepsis or septic shock (Tubiana 2016). true scores 1. magent does not diagnose sepsis."
},
"vertebral_osteomyelitis": {
"type": "boolean",
"description": "Caller-assigned vertebral osteomyelitis / spondylodiscitis (Tubiana 2016). true scores 2. magent does not diagnose osteomyelitis."
},
"community_or_non_nosocomial": {
"type": "boolean",
"description": "Community-acquired or non-nosocomial healthcare-associated Staphylococcus aureus bacteremia (Tubiana 2016), as assigned by the caller. true scores 2; nosocomial is false (0). magent does not classify acquisition."
},
"cerebral_or_peripheral_emboli": {
"type": "boolean",
"description": "Caller-assigned cerebral or peripheral (extracerebral) emboli (Tubiana 2016). true scores 5. magent does not diagnose emboli or endocarditis."
},
"intracardiac_device_or_previous_ie": {
"type": "boolean",
"description": "Permanent intracardiac device or previous infective endocarditis as one Tubiana 2016 item. true scores 4 if either is present; the two are not added separately. magent does not diagnose IE."
}
}
}
},
"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/virsta",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"crp_mg_l": 50,
"meningitis": false,
"iv_drug_use": false,
"native_valve_disease": false,
"persistent_bacteremia": false,
"severe_sepsis_or_shock": false,
"vertebral_osteomyelitis": false,
"community_or_non_nosocomial": false,
"cerebral_or_peripheral_emboli": false,
"intracardiac_device_or_previous_ie": false
},
{
"crp_mg_l": 50,
"meningitis": false,
"iv_drug_use": false,
"native_valve_disease": false,
"persistent_bacteremia": false,
"severe_sepsis_or_shock": false,
"vertebral_osteomyelitis": false,
"community_or_non_nosocomial": false,
"cerebral_or_peripheral_emboli": false,
"intracardiac_device_or_previous_ie": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/virsta",
"count": 2,
"items": [
{
"score": 0,
"formula": "virsta",
"citation": {
"id": "tubiana-2016",
"doi": "10.1016/j.jinf.2016.02.003",
"pmid": "26916042",
"title": "The VIRSTA score, a prediction score to estimate risk of infective endocarditis and determine priority for echocardiography in patients with Staphylococcus aureus bacteremia",
"source": "J Infect. 2016;72(5):544-553",
"authors": "Tubiana S, Duval X, Alla F, Selton-Suty C, Tattevin P, Delahaye F, Piroth L, Chirouze C, Lavigne JP, Erpelding ML, Hoen B, Vandenesch F, Iung B, Le Moing V"
},
"crp_mg_l": 50,
"high_risk": false,
"max_score": 30,
"components": [
{
"factor": "cerebral_or_peripheral_emboli",
"points": 0,
"present": false
},
{
"factor": "meningitis",
"points": 0,
"present": false
},
{
"factor": "intracardiac_device_or_previous_ie",
"points": 0,
"present": false
},
{
"factor": "iv_drug_use",
"points": 0,
"present": false
},
{
"factor": "native_valve_disease",
"points": 0,
"present": false
},
{
"factor": "persistent_bacteremia",
"points": 0,
"present": false
},
{
"factor": "vertebral_osteomyelitis",
"points": 0,
"present": false
},
{
"factor": "community_or_non_nosocomial",
"points": 0,
"present": false
},
{
"factor": "severe_sepsis_or_shock",
"points": 0,
"present": false
},
{
"value": 50,
"factor": "crp_gt_190",
"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.",
"formula_expression": "VIRSTA = cerebral_or_peripheral_emboli (5 if present) + meningitis (5) + intracardiac_device_or_previous_ie (4) + iv_drug_use (4) + native_valve_disease (3) + persistent_bacteremia (3) + vertebral_osteomyelitis (2) + community_or_non_nosocomial (2) + severe_sepsis_or_shock (1) + (crp_mg_l > 190 → 1); Tubiana 2016 caller-assigned items; CRP cutoff is above 190 mg/L (not ≥190); intracardiac device or previous IE is one 4-point item; max 30; high_risk iff score ≥ 3"
},
{
"score": 0,
"formula": "virsta",
"citation": {
"id": "tubiana-2016",
"doi": "10.1016/j.jinf.2016.02.003",
"pmid": "26916042",
"title": "The VIRSTA score, a prediction score to estimate risk of infective endocarditis and determine priority for echocardiography in patients with Staphylococcus aureus bacteremia",
"source": "J Infect. 2016;72(5):544-553",
"authors": "Tubiana S, Duval X, Alla F, Selton-Suty C, Tattevin P, Delahaye F, Piroth L, Chirouze C, Lavigne JP, Erpelding ML, Hoen B, Vandenesch F, Iung B, Le Moing V"
},
"crp_mg_l": 50,
"high_risk": false,
"max_score": 30,
"components": [
{
"factor": "cerebral_or_peripheral_emboli",
"points": 0,
"present": false
},
{
"factor": "meningitis",
"points": 0,
"present": false
},
{
"factor": "intracardiac_device_or_previous_ie",
"points": 0,
"present": false
},
{
"factor": "iv_drug_use",
"points": 0,
"present": false
},
{
"factor": "native_valve_disease",
"points": 0,
"present": false
},
{
"factor": "persistent_bacteremia",
"points": 0,
"present": false
},
{
"factor": "vertebral_osteomyelitis",
"points": 0,
"present": false
},
{
"factor": "community_or_non_nosocomial",
"points": 0,
"present": false
},
{
"factor": "severe_sepsis_or_shock",
"points": 0,
"present": false
},
{
"value": 50,
"factor": "crp_gt_190",
"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.",
"formula_expression": "VIRSTA = cerebral_or_peripheral_emboli (5 if present) + meningitis (5) + intracardiac_device_or_previous_ie (4) + iv_drug_use (4) + native_valve_disease (3) + persistent_bacteremia (3) + vertebral_osteomyelitis (2) + community_or_non_nosocomial (2) + severe_sepsis_or_shock (1) + (crp_mg_l > 190 → 1); Tubiana 2016 caller-assigned items; CRP cutoff is above 190 mg/L (not ≥190); intracardiac device or previous IE is one 4-point item; max 30; high_risk iff score ≥ 3"
}
]
}
},
"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": [
"cerebral_or_peripheral_emboli",
"meningitis",
"intracardiac_device_or_previous_ie",
"iv_drug_use",
"native_valve_disease",
"persistent_bacteremia",
"vertebral_osteomyelitis",
"community_or_non_nosocomial",
"severe_sepsis_or_shock",
"crp_mg_l"
],
"properties": {
"crp_mg_l": {
"type": "number",
"description": "C-reactive protein in mg/L (0-500). Tubiana 2016 scores 1 if CRP is above 190 mg/L (not ≥190). magent does not assay CRP."
},
"meningitis": {
"type": "boolean",
"description": "Caller-assigned meningitis (Tubiana 2016). true scores 5. magent does not diagnose meningitis or endocarditis."
},
"iv_drug_use": {
"type": "boolean",
"description": "Caller-assigned intravenous drug use (Tubiana 2016). true scores 4. magent does not take a social history."
},
"native_valve_disease": {
"type": "boolean",
"description": "Caller-assigned preexisting native valve disease (Tubiana 2016). true scores 3. magent does not diagnose valve disease."
},
"persistent_bacteremia": {
"type": "boolean",
"description": "H48-persistent bacteremia (positive blood culture after 48 hours) as assigned by the caller (Tubiana 2016). true scores 3. magent does not interpret cultures."
},
"severe_sepsis_or_shock": {
"type": "boolean",
"description": "Caller-assigned severe sepsis or septic shock (Tubiana 2016). true scores 1. magent does not diagnose sepsis."
},
"vertebral_osteomyelitis": {
"type": "boolean",
"description": "Caller-assigned vertebral osteomyelitis / spondylodiscitis (Tubiana 2016). true scores 2. magent does not diagnose osteomyelitis."
},
"community_or_non_nosocomial": {
"type": "boolean",
"description": "Community-acquired or non-nosocomial healthcare-associated Staphylococcus aureus bacteremia (Tubiana 2016), as assigned by the caller. true scores 2; nosocomial is false (0). magent does not classify acquisition."
},
"cerebral_or_peripheral_emboli": {
"type": "boolean",
"description": "Caller-assigned cerebral or peripheral (extracerebral) emboli (Tubiana 2016). true scores 5. magent does not diagnose emboli or endocarditis."
},
"intracardiac_device_or_previous_ie": {
"type": "boolean",
"description": "Permanent intracardiac device or previous infective endocarditis as one Tubiana 2016 item. true scores 4 if either is present; the two are not added separately. magent does not diagnose IE."
}
}
},
"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 08:32Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 06:15Z
- 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. 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/virsta, 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.