magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Searchofflineeip155:8453Exactvia cdp
VillaltaPtsVteThrombosisCalculator
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 13:19Z
—
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/villalta",
"assetTransferMethod": "eip3009"
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"resource": {
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"tags": [
"villalta",
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"vte",
"thrombosis",
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],
"mimeType": "application/json",
"description": "Kahn 2009 Villalta scale (ISTH SSC): five caller-assigned symptoms and six signs, each 0-3 (none/mild/moderate/severe), summed 0-33. Venous ulcer is a separate boolean and is not added as 15 points. PTS if score ≥5 or ulcer; bands none 0-4 (no ulcer), mild 5-9, moderate 10-14, severe if ≥15 or ulcer. magent does not examine the limb. Not CEAP, not VCSS, not Ginsberg PTS.",
"serviceName": "magent"
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"extensions": {
"bazaar": {
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}
},
"output": {
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},
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{
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{
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}
],
"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": "Villalta = pain + cramps + heaviness + pruritus + paresthesia + pretibial_edema + skin_induration + hyperpigmentation + venous_ectasia + redness + pain_on_calf_compression; each caller-assigned 0-3; max 33; ulcer is a separate boolean and is not added to the score; PTS if score ≥5 or ulcer; none 0-4 (no ulcer); mild 5-9; moderate 10-14; severe if score ≥15 or ulcer"
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
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"properties": {
"input": {
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"required": [
"type",
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"properties": {
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"const": "http"
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"method": {
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"DELETE"
],
"type": "string"
},
"headers": {
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"additionalProperties": {
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},
"queryParams": {
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"required": [
"pain",
"cramps",
"heaviness",
"pruritus",
"paresthesia",
"pretibial_edema",
"skin_induration",
"hyperpigmentation",
"venous_ectasia",
"redness",
"pain_on_calf_compression",
"ulcer"
],
"properties": {
"pain": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom pain (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"ulcer": {
"type": "boolean",
"description": "Caller-assigned venous ulcer (true or false). Presence classifies PTS as severe (Kahn 2009) and does not add 15 to the numeric score. magent does not examine the limb."
},
"cramps": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom cramps (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"redness": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign redness (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pruritus": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom pruritus (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"heaviness": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom heaviness (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"paresthesia": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom paresthesia (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"venous_ectasia": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign venous ectasia (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pretibial_edema": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign pretibial edema (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"skin_induration": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign skin induration (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"hyperpigmentation": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign hyperpigmentation (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pain_on_calf_compression": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign pain on calf compression (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
}
}
}
},
"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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"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/villalta",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"pain": 0,
"ulcer": false,
"cramps": 0,
"redness": 0,
"pruritus": 0,
"heaviness": 0,
"paresthesia": 0,
"venous_ectasia": 0,
"pretibial_edema": 0,
"skin_induration": 0,
"hyperpigmentation": 0,
"pain_on_calf_compression": 0
},
{
"pain": 0,
"ulcer": false,
"cramps": 0,
"redness": 0,
"pruritus": 0,
"heaviness": 0,
"paresthesia": 0,
"venous_ectasia": 0,
"pretibial_edema": 0,
"skin_induration": 0,
"hyperpigmentation": 0,
"pain_on_calf_compression": 0
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/villalta",
"count": 2,
"items": [
{
"pts": false,
"score": 0,
"ulcer": false,
"formula": "villalta",
"citation": {
"id": "kahn-2009",
"doi": "10.1111/j.1538-7836.2009.03339.x",
"pmid": "19320818",
"title": "Measurement properties of the Villalta scale to define and classify the severity of the post-thrombotic syndrome",
"source": "J Thromb Haemost. 2009;7(5):884-888",
"authors": "Kahn SR"
},
"pts_band": "none",
"max_score": 33,
"components": [
{
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"factor": "pain",
"points": 0,
"present": true
},
{
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"factor": "cramps",
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"present": true
},
{
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"present": true
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{
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},
{
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"factor": "paresthesia",
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"present": true
},
{
"value": 0,
"factor": "pretibial_edema",
"points": 0,
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},
{
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{
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"factor": "hyperpigmentation",
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{
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"points": 0,
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{
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"present": true
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{
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"points": 0,
"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.",
"formula_expression": "Villalta = pain + cramps + heaviness + pruritus + paresthesia + pretibial_edema + skin_induration + hyperpigmentation + venous_ectasia + redness + pain_on_calf_compression; each caller-assigned 0-3; max 33; ulcer is a separate boolean and is not added to the score; PTS if score ≥5 or ulcer; none 0-4 (no ulcer); mild 5-9; moderate 10-14; severe if score ≥15 or ulcer"
},
{
"pts": false,
"score": 0,
"ulcer": false,
"formula": "villalta",
"citation": {
"id": "kahn-2009",
"doi": "10.1111/j.1538-7836.2009.03339.x",
"pmid": "19320818",
"title": "Measurement properties of the Villalta scale to define and classify the severity of the post-thrombotic syndrome",
"source": "J Thromb Haemost. 2009;7(5):884-888",
"authors": "Kahn SR"
},
"pts_band": "none",
"max_score": 33,
"components": [
{
"value": 0,
"factor": "pain",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "cramps",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "heaviness",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "pruritus",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "paresthesia",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "pretibial_edema",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "skin_induration",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "hyperpigmentation",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "venous_ectasia",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "redness",
"points": 0,
"present": true
},
{
"value": 0,
"factor": "pain_on_calf_compression",
"points": 0,
"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.",
"formula_expression": "Villalta = pain + cramps + heaviness + pruritus + paresthesia + pretibial_edema + skin_induration + hyperpigmentation + venous_ectasia + redness + pain_on_calf_compression; each caller-assigned 0-3; max 33; ulcer is a separate boolean and is not added to the score; PTS if score ≥5 or ulcer; none 0-4 (no ulcer); mild 5-9; moderate 10-14; severe if score ≥15 or ulcer"
}
]
}
},
"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": [
"pain",
"cramps",
"heaviness",
"pruritus",
"paresthesia",
"pretibial_edema",
"skin_induration",
"hyperpigmentation",
"venous_ectasia",
"redness",
"pain_on_calf_compression",
"ulcer"
],
"properties": {
"pain": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom pain (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"ulcer": {
"type": "boolean",
"description": "Caller-assigned venous ulcer (true or false). Presence classifies PTS as severe (Kahn 2009) and does not add 15 to the numeric score. magent does not examine the limb."
},
"cramps": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom cramps (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"redness": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign redness (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pruritus": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom pruritus (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"heaviness": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom heaviness (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"paresthesia": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta symptom paresthesia (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"venous_ectasia": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign venous ectasia (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pretibial_edema": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign pretibial edema (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"skin_induration": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign skin induration (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"hyperpigmentation": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign hyperpigmentation (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
},
"pain_on_calf_compression": {
"type": "integer",
"description": "Caller-assigned Kahn 2009 Villalta sign pain on calf compression (integer 0-3: 0 none, 1 mild, 2 moderate, 3 severe). magent does not examine the limb."
}
}
},
"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 13:19Z
- 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/villalta, 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.