magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Dataofflineeip155:8453Exactvia cdp
ErefsEosinophilic-oesophagitisEndoscopyGiCalculator
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 13:09Z
—
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/erefs",
"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/erefs",
"tags": [
"erefs",
"eosinophilic-oesophagitis",
"endoscopy",
"gi",
"calculator"
],
"mimeType": "application/json",
"description": "Hirano 2013 modified EREFS: caller-assigned edema (absent 0, present 1), rings (none 0, mild 1, moderate 2, severe 3), exudates (none 0, mild_lt_10pct 1, severe_gt_10pct 2), furrows (absent 0, present 1; original 0-2 collapsed), stricture (absent 0, present 1). magent sums only (max 8; not later 0-9). No activity bands, inflammatory/fibrostenotic subscores, crepe-paper, or narrow-calibre. magent does not perform endoscopy. Not a diagnosis.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"edema": "absent",
"rings": "none",
"furrows": "absent",
"exudates": "none",
"stricture": "absent"
}
},
"output": {
"type": "json",
"example": {
"edema": "absent",
"rings": "none",
"score": 0,
"formula": "erefs",
"furrows": "absent",
"citation": {
"id": "hirano-2013",
"doi": "10.1136/gutjnl-2011-301817",
"pmid": "22619364",
"title": "Endoscopic assessment of the oesophageal features of eosinophilic oesophagitis: validation of a novel classification and grading system.",
"source": "Gut. 2013;62(4):489-495",
"authors": "Hirano I, Moy N, Heckman MG, Thomas CS, Gonsalves N, Achem SR"
},
"exudates": "none",
"max_score": 8,
"stricture": "absent",
"components": [
{
"value": "absent",
"factor": "edema",
"points": 0,
"present": true
},
{
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"factor": "rings",
"points": 0,
"present": true
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{
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"factor": "exudates",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "furrows",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "stricture",
"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": "EREFS = edema (absent 0, present 1; loss of vascular markings) + rings (none 0, mild 1, moderate 2, severe 3) + exudates (none 0, mild_lt_10pct 1, severe_gt_10pct 2) + furrows (absent 0, present 1; modified, original 0-2 collapsed) + stricture (absent 0, present 1); Hirano 2013 modified good-agreement version; not later 0-9 furrows 0-2; crepe-paper and narrow-calibre not scored; no published total-score activity bands"
}
},
"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": [
"edema",
"rings",
"exudates",
"furrows",
"stricture"
],
"properties": {
"edema": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 modified EREFS edema (oedema; loss of vascular markings): absent (0; vascular markings present) or present (1; decreased or absent vascular markings). magent does not perform endoscopy."
},
"rings": {
"enum": [
"none",
"mild",
"moderate",
"severe"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS rings (fixed rings): none (0), mild (1; subtle circumferential ridges), moderate (2; distinct rings that a diagnostic adult endoscope still passes), or severe (3; cannot pass a diagnostic adult endoscope). magent does not perform endoscopy."
},
"furrows": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 modified EREFS furrows (vertical lines): absent (0) or present (1). Original Hirano 2013 graded furrows 0-2 (none / mild without depth / severe with indentation); the modified good-agreement version collapses that to absent vs present. Not the later 0-9 expansion that restores furrows 0-2. magent does not perform endoscopy."
},
"exudates": {
"enum": [
"none",
"mild_lt_10pct",
"severe_gt_10pct"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS exudates (white plaques): none (0), mild_lt_10pct (1; lesions involving <10% of the oesophageal surface area), or severe_gt_10pct (2; lesions involving >10% of the oesophageal surface area). magent does not perform endoscopy."
},
"stricture": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS stricture: absent (0) or present (1). magent does not perform endoscopy."
}
}
}
},
"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/erefs",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"edema": "absent",
"rings": "none",
"furrows": "absent",
"exudates": "none",
"stricture": "absent"
},
{
"edema": "absent",
"rings": "none",
"furrows": "absent",
"exudates": "none",
"stricture": "absent"
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/erefs",
"count": 2,
"items": [
{
"edema": "absent",
"rings": "none",
"score": 0,
"formula": "erefs",
"furrows": "absent",
"citation": {
"id": "hirano-2013",
"doi": "10.1136/gutjnl-2011-301817",
"pmid": "22619364",
"title": "Endoscopic assessment of the oesophageal features of eosinophilic oesophagitis: validation of a novel classification and grading system.",
"source": "Gut. 2013;62(4):489-495",
"authors": "Hirano I, Moy N, Heckman MG, Thomas CS, Gonsalves N, Achem SR"
},
"exudates": "none",
"max_score": 8,
"stricture": "absent",
"components": [
{
"value": "absent",
"factor": "edema",
"points": 0,
"present": true
},
{
"value": "none",
"factor": "rings",
"points": 0,
"present": true
},
{
"value": "none",
"factor": "exudates",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "furrows",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "stricture",
"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": "EREFS = edema (absent 0, present 1; loss of vascular markings) + rings (none 0, mild 1, moderate 2, severe 3) + exudates (none 0, mild_lt_10pct 1, severe_gt_10pct 2) + furrows (absent 0, present 1; modified, original 0-2 collapsed) + stricture (absent 0, present 1); Hirano 2013 modified good-agreement version; not later 0-9 furrows 0-2; crepe-paper and narrow-calibre not scored; no published total-score activity bands"
},
{
"edema": "absent",
"rings": "none",
"score": 0,
"formula": "erefs",
"furrows": "absent",
"citation": {
"id": "hirano-2013",
"doi": "10.1136/gutjnl-2011-301817",
"pmid": "22619364",
"title": "Endoscopic assessment of the oesophageal features of eosinophilic oesophagitis: validation of a novel classification and grading system.",
"source": "Gut. 2013;62(4):489-495",
"authors": "Hirano I, Moy N, Heckman MG, Thomas CS, Gonsalves N, Achem SR"
},
"exudates": "none",
"max_score": 8,
"stricture": "absent",
"components": [
{
"value": "absent",
"factor": "edema",
"points": 0,
"present": true
},
{
"value": "none",
"factor": "rings",
"points": 0,
"present": true
},
{
"value": "none",
"factor": "exudates",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "furrows",
"points": 0,
"present": true
},
{
"value": "absent",
"factor": "stricture",
"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": "EREFS = edema (absent 0, present 1; loss of vascular markings) + rings (none 0, mild 1, moderate 2, severe 3) + exudates (none 0, mild_lt_10pct 1, severe_gt_10pct 2) + furrows (absent 0, present 1; modified, original 0-2 collapsed) + stricture (absent 0, present 1); Hirano 2013 modified good-agreement version; not later 0-9 furrows 0-2; crepe-paper and narrow-calibre not scored; no published total-score activity bands"
}
]
}
},
"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": [
"edema",
"rings",
"exudates",
"furrows",
"stricture"
],
"properties": {
"edema": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 modified EREFS edema (oedema; loss of vascular markings): absent (0; vascular markings present) or present (1; decreased or absent vascular markings). magent does not perform endoscopy."
},
"rings": {
"enum": [
"none",
"mild",
"moderate",
"severe"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS rings (fixed rings): none (0), mild (1; subtle circumferential ridges), moderate (2; distinct rings that a diagnostic adult endoscope still passes), or severe (3; cannot pass a diagnostic adult endoscope). magent does not perform endoscopy."
},
"furrows": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 modified EREFS furrows (vertical lines): absent (0) or present (1). Original Hirano 2013 graded furrows 0-2 (none / mild without depth / severe with indentation); the modified good-agreement version collapses that to absent vs present. Not the later 0-9 expansion that restores furrows 0-2. magent does not perform endoscopy."
},
"exudates": {
"enum": [
"none",
"mild_lt_10pct",
"severe_gt_10pct"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS exudates (white plaques): none (0), mild_lt_10pct (1; lesions involving <10% of the oesophageal surface area), or severe_gt_10pct (2; lesions involving >10% of the oesophageal surface area). magent does not perform endoscopy."
},
"stricture": {
"enum": [
"absent",
"present"
],
"type": "string",
"description": "Caller-assigned Hirano 2013 EREFS stricture: absent (0) or present (1). magent does not perform endoscopy."
}
}
},
"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 13:09Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 10:15Z
- 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/erefs, 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.