magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
MediaLiveeip155:8453Exactvia cdp
Montreal-ibdCrohnUlcerative-colitisGiPhenotype
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 06:13Z
—
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/montreal_ibd",
"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/montreal_ibd",
"tags": [
"montreal-ibd",
"crohn",
"ulcerative-colitis",
"gi",
"phenotype"
],
"mimeType": "application/json",
"description": "Satsangi 2006 Montreal IBD phenotype (Vienna revision). Crohn: A1-A3, L1-L4, B1-B3, optional +L4 (not when isolated L4) and p. UC: E1-E3 plus S0-S3 as assigned. Compact string, no spaces. Not an activity index (not CDAI/Mayo), not Paris, not IBDU. magent does not perform endoscopy. Not a diagnosis. Not a medical device.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"extent": "E1",
"disease": "crohn",
"location": "L3",
"perianal": false,
"severity": "S0",
"upper_gi": false,
"behaviour": "B1",
"age_at_diagnosis": "A2"
}
},
"output": {
"type": "json",
"example": {
"disease": "crohn",
"formula": "montreal_ibd",
"citation": {
"id": "satsangi-2006",
"doi": "10.1136/gut.2005.082909",
"pmid": "16698746",
"title": "The Montreal classification of inflammatory bowel disease: controversies, consensus, and implications",
"source": "Gut. 2006;55(6):749-753",
"authors": "Satsangi J, Silverberg MS, Vermeire S, Colombel JF"
},
"criteria": [
{
"met": true,
"factor": "disease_crohn"
},
{
"met": false,
"factor": "disease_uc"
},
{
"met": false,
"factor": "A1"
},
{
"met": true,
"factor": "A2"
},
{
"met": false,
"factor": "A3"
},
{
"met": false,
"factor": "L1"
},
{
"met": false,
"factor": "L2"
},
{
"met": true,
"factor": "L3"
},
{
"met": false,
"factor": "L4"
},
{
"met": false,
"factor": "upper_gi"
},
{
"met": true,
"factor": "B1"
},
{
"met": false,
"factor": "B2"
},
{
"met": false,
"factor": "B3"
},
{
"met": false,
"factor": "perianal"
}
],
"phenotype": "A2L3B1",
"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": "Crohn phenotype = age_at_diagnosis (A1 ≤16 y, A2 17-40 y, A3 >40 y) + location (L1 ileal, L2 colonic, L3 ileocolonic, L4 isolated upper GI) + optional +L4 when concomitant upper GI with L1-L3 (forbidden when location is isolated L4) + behaviour (B1 non-stricturing non-penetrating, B2 stricturing, B3 penetrating) + optional p when concomitant perianal disease; UC phenotype = extent (E1 ulcerative proctitis distal to the rectosigmoid junction, E2 left-sided distal to the splenic flexure, E3 extensive proximal to the splenic flexure) + severity (S0 clinical remission, S1 mild, S2 moderate, S3 severe as assigned) (Satsangi 2006 Montreal revision of Vienna). Compact string, no spaces. Not a disease-activity score. magent does not perform endoscopy. Not Paris pediatric classification."
}
},
"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": [
"disease"
],
"properties": {
"extent": {
"enum": [
"E1",
"E2",
"E3"
],
"type": "string",
"description": "Montreal UC extent as assigned (Satsangi 2006): E1 ulcerative proctitis (distal to the rectosigmoid junction), E2 left-sided (distal to the splenic flexure), E3 extensive (proximal to the splenic flexure). Required when disease=uc. Omit when disease=crohn. magent does not perform endoscopy."
},
"disease": {
"enum": [
"crohn",
"uc"
],
"type": "string",
"description": "Satsangi 2006 Montreal disease as assigned: crohn or uc. IBDU and indeterminate colitis are not encoded. magent does not diagnose IBD."
},
"location": {
"enum": [
"L1",
"L2",
"L3",
"L4"
],
"type": "string",
"description": "Montreal Crohn location as assigned (Satsangi 2006): L1 ileal, L2 colonic, L3 ileocolonic, L4 isolated upper GI. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"perianal": {
"type": "boolean",
"description": "Concomitant perianal disease as assigned (Satsangi 2006 p modifier). true appends p after B1, B2, or B3. Required when disease=crohn. Omit when disease=uc. magent does not examine the patient."
},
"severity": {
"enum": [
"S0",
"S1",
"S2",
"S3"
],
"type": "string",
"description": "Montreal UC severity as assigned (Satsangi 2006): S0 clinical remission; S1 mild (≤4 stools/day with or without blood, no systemic illness, normal ESR); S2 moderate (>4 stools/day, minimal systemic toxicity); S3 severe (≥6 bloody stools/day AND pulse ≥90 AND temperature ≥37.5°C AND haemoglobin <10.5 g/100 ml AND ESR ≥30 mm/h). The caller assigns the S token. Required when disease=uc. Omit when disease=crohn. magent does not take vitals."
},
"upper_gi": {
"type": "boolean",
"description": "Concomitant upper GI disease as assigned (Satsangi 2006 L4 modifier). true adds +L4 after L1, L2, or L3. Must be false when location is isolated L4. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"behaviour": {
"enum": [
"B1",
"B2",
"B3"
],
"type": "string",
"description": "Montreal Crohn behaviour as assigned (Satsangi 2006): B1 non-stricturing non-penetrating, B2 stricturing, B3 penetrating. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"age_at_diagnosis": {
"enum": [
"A1",
"A2",
"A3"
],
"type": "string",
"description": "Montreal Crohn age at diagnosis as assigned (Satsangi 2006): A1 ≤16 years, A2 17-40 years, A3 >40 years. Required when disease=crohn. Omit when disease=uc. magent does not assign the A token from a chart."
}
}
}
},
"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/montreal_ibd",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"extent": "E1",
"disease": "crohn",
"location": "L3",
"perianal": false,
"severity": "S0",
"upper_gi": false,
"behaviour": "B1",
"age_at_diagnosis": "A2"
},
{
"extent": "E1",
"disease": "crohn",
"location": "L3",
"perianal": false,
"severity": "S0",
"upper_gi": false,
"behaviour": "B1",
"age_at_diagnosis": "A2"
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/montreal_ibd",
"count": 2,
"items": [
{
"disease": "crohn",
"formula": "montreal_ibd",
"citation": {
"id": "satsangi-2006",
"doi": "10.1136/gut.2005.082909",
"pmid": "16698746",
"title": "The Montreal classification of inflammatory bowel disease: controversies, consensus, and implications",
"source": "Gut. 2006;55(6):749-753",
"authors": "Satsangi J, Silverberg MS, Vermeire S, Colombel JF"
},
"criteria": [
{
"met": true,
"factor": "disease_crohn"
},
{
"met": false,
"factor": "disease_uc"
},
{
"met": false,
"factor": "A1"
},
{
"met": true,
"factor": "A2"
},
{
"met": false,
"factor": "A3"
},
{
"met": false,
"factor": "L1"
},
{
"met": false,
"factor": "L2"
},
{
"met": true,
"factor": "L3"
},
{
"met": false,
"factor": "L4"
},
{
"met": false,
"factor": "upper_gi"
},
{
"met": true,
"factor": "B1"
},
{
"met": false,
"factor": "B2"
},
{
"met": false,
"factor": "B3"
},
{
"met": false,
"factor": "perianal"
}
],
"phenotype": "A2L3B1",
"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": "Crohn phenotype = age_at_diagnosis (A1 ≤16 y, A2 17-40 y, A3 >40 y) + location (L1 ileal, L2 colonic, L3 ileocolonic, L4 isolated upper GI) + optional +L4 when concomitant upper GI with L1-L3 (forbidden when location is isolated L4) + behaviour (B1 non-stricturing non-penetrating, B2 stricturing, B3 penetrating) + optional p when concomitant perianal disease; UC phenotype = extent (E1 ulcerative proctitis distal to the rectosigmoid junction, E2 left-sided distal to the splenic flexure, E3 extensive proximal to the splenic flexure) + severity (S0 clinical remission, S1 mild, S2 moderate, S3 severe as assigned) (Satsangi 2006 Montreal revision of Vienna). Compact string, no spaces. Not a disease-activity score. magent does not perform endoscopy. Not Paris pediatric classification."
},
{
"disease": "crohn",
"formula": "montreal_ibd",
"citation": {
"id": "satsangi-2006",
"doi": "10.1136/gut.2005.082909",
"pmid": "16698746",
"title": "The Montreal classification of inflammatory bowel disease: controversies, consensus, and implications",
"source": "Gut. 2006;55(6):749-753",
"authors": "Satsangi J, Silverberg MS, Vermeire S, Colombel JF"
},
"criteria": [
{
"met": true,
"factor": "disease_crohn"
},
{
"met": false,
"factor": "disease_uc"
},
{
"met": false,
"factor": "A1"
},
{
"met": true,
"factor": "A2"
},
{
"met": false,
"factor": "A3"
},
{
"met": false,
"factor": "L1"
},
{
"met": false,
"factor": "L2"
},
{
"met": true,
"factor": "L3"
},
{
"met": false,
"factor": "L4"
},
{
"met": false,
"factor": "upper_gi"
},
{
"met": true,
"factor": "B1"
},
{
"met": false,
"factor": "B2"
},
{
"met": false,
"factor": "B3"
},
{
"met": false,
"factor": "perianal"
}
],
"phenotype": "A2L3B1",
"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": "Crohn phenotype = age_at_diagnosis (A1 ≤16 y, A2 17-40 y, A3 >40 y) + location (L1 ileal, L2 colonic, L3 ileocolonic, L4 isolated upper GI) + optional +L4 when concomitant upper GI with L1-L3 (forbidden when location is isolated L4) + behaviour (B1 non-stricturing non-penetrating, B2 stricturing, B3 penetrating) + optional p when concomitant perianal disease; UC phenotype = extent (E1 ulcerative proctitis distal to the rectosigmoid junction, E2 left-sided distal to the splenic flexure, E3 extensive proximal to the splenic flexure) + severity (S0 clinical remission, S1 mild, S2 moderate, S3 severe as assigned) (Satsangi 2006 Montreal revision of Vienna). Compact string, no spaces. Not a disease-activity score. magent does not perform endoscopy. Not Paris pediatric classification."
}
]
}
},
"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": [
"disease"
],
"properties": {
"extent": {
"enum": [
"E1",
"E2",
"E3"
],
"type": "string",
"description": "Montreal UC extent as assigned (Satsangi 2006): E1 ulcerative proctitis (distal to the rectosigmoid junction), E2 left-sided (distal to the splenic flexure), E3 extensive (proximal to the splenic flexure). Required when disease=uc. Omit when disease=crohn. magent does not perform endoscopy."
},
"disease": {
"enum": [
"crohn",
"uc"
],
"type": "string",
"description": "Satsangi 2006 Montreal disease as assigned: crohn or uc. IBDU and indeterminate colitis are not encoded. magent does not diagnose IBD."
},
"location": {
"enum": [
"L1",
"L2",
"L3",
"L4"
],
"type": "string",
"description": "Montreal Crohn location as assigned (Satsangi 2006): L1 ileal, L2 colonic, L3 ileocolonic, L4 isolated upper GI. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"perianal": {
"type": "boolean",
"description": "Concomitant perianal disease as assigned (Satsangi 2006 p modifier). true appends p after B1, B2, or B3. Required when disease=crohn. Omit when disease=uc. magent does not examine the patient."
},
"severity": {
"enum": [
"S0",
"S1",
"S2",
"S3"
],
"type": "string",
"description": "Montreal UC severity as assigned (Satsangi 2006): S0 clinical remission; S1 mild (≤4 stools/day with or without blood, no systemic illness, normal ESR); S2 moderate (>4 stools/day, minimal systemic toxicity); S3 severe (≥6 bloody stools/day AND pulse ≥90 AND temperature ≥37.5°C AND haemoglobin <10.5 g/100 ml AND ESR ≥30 mm/h). The caller assigns the S token. Required when disease=uc. Omit when disease=crohn. magent does not take vitals."
},
"upper_gi": {
"type": "boolean",
"description": "Concomitant upper GI disease as assigned (Satsangi 2006 L4 modifier). true adds +L4 after L1, L2, or L3. Must be false when location is isolated L4. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"behaviour": {
"enum": [
"B1",
"B2",
"B3"
],
"type": "string",
"description": "Montreal Crohn behaviour as assigned (Satsangi 2006): B1 non-stricturing non-penetrating, B2 stricturing, B3 penetrating. Required when disease=crohn. Omit when disease=uc. magent does not perform endoscopy."
},
"age_at_diagnosis": {
"enum": [
"A1",
"A2",
"A3"
],
"type": "string",
"description": "Montreal Crohn age at diagnosis as assigned (Satsangi 2006): A1 ≤16 years, A2 17-40 years, A3 >40 years. Required when disease=crohn. Omit when disease=uc. magent does not assign the A token from a chart."
}
}
},
"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 06:13Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 03:45Z
- 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/montreal_ibd, 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.