magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
SearchLiveeip155:8453Exactvia cdp
Rome-iv-child-ibsChild-ibsGiRome-ivH2b
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 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 05:30Z
—
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/rome_iv_child_ibs",
"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/rome_iv_child_ibs",
"tags": [
"rome-iv-child-ibs",
"child-ibs",
"gi",
"rome-iv",
"h2b"
],
"mimeType": "application/json",
"description": "Hyams 2016 Rome IV H2b. rome_iv_child_ibs is true iff pain at least 4 days per month, stool_features_met >= 1, pain_does_not_resolve_with_constipation_treatment, not another condition, and 2-month duration. stool_features_met (0-3) counts related_to_defecation, change_in_stool_frequency, and change_in_stool_form. Caller assigns seven flags. magent does not examine the patient. Not a diagnosis. Not adult Rome IV IBS, not child functional constipation, not IBS-C/D/M/U subtype.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"change_in_stool_form": false,
"related_to_defecation": true,
"change_in_stool_frequency": true,
"fulfilled_at_least_2_months": true,
"not_explained_by_another_condition": true,
"abdominal_pain_at_least_4_days_per_month": true,
"pain_does_not_resolve_with_constipation_treatment": true
}
},
"output": {
"type": "json",
"example": {
"formula": "rome_iv_child_ibs",
"citation": {
"id": "hyams-2016",
"doi": "10.1053/j.gastro.2016.02.015",
"pmid": "27144632",
"title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent",
"source": "Gastroenterology. 2016;150(6):1456-1468",
"authors": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M"
},
"criteria": [
{
"met": true,
"factor": "abdominal_pain_at_least_4_days_per_month"
},
{
"met": true,
"factor": "related_to_defecation"
},
{
"met": true,
"factor": "change_in_stool_frequency"
},
{
"met": false,
"factor": "change_in_stool_form"
},
{
"met": true,
"factor": "pain_does_not_resolve_with_constipation_treatment"
},
{
"met": true,
"factor": "not_explained_by_another_condition"
},
{
"met": true,
"factor": "fulfilled_at_least_2_months"
},
{
"met": true,
"value": 2,
"factor": "stool_features_ge_1"
}
],
"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.",
"rome_iv_child_ibs": true,
"formula_expression": "rome_iv_child_ibs iff abdominal_pain_at_least_4_days_per_month and stool_features_met >= 1 and pain_does_not_resolve_with_constipation_treatment and not_explained_by_another_condition and fulfilled_at_least_2_months; stool_features_met counts related_to_defecation, change_in_stool_frequency, and change_in_stool_form (Hyams 2016 Rome IV H2b child/adolescent IBS)",
"stool_features_met": 2
}
},
"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": [
"abdominal_pain_at_least_4_days_per_month",
"related_to_defecation",
"change_in_stool_frequency",
"change_in_stool_form",
"pain_does_not_resolve_with_constipation_treatment",
"not_explained_by_another_condition",
"fulfilled_at_least_2_months"
],
"properties": {
"change_in_stool_form": {
"type": "boolean",
"description": "Pain associated with a change in form (appearance) of stool (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"related_to_defecation": {
"type": "boolean",
"description": "Pain related to defecation (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"change_in_stool_frequency": {
"type": "boolean",
"description": "Pain associated with a change in frequency of stool (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"fulfilled_at_least_2_months": {
"type": "boolean",
"description": "Criteria fulfilled for at least 2 months, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not take a history."
},
"not_explained_by_another_condition": {
"type": "boolean",
"description": "After appropriate evaluation, the symptoms cannot be fully explained by another medical condition, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not examine the patient."
},
"abdominal_pain_at_least_4_days_per_month": {
"type": "boolean",
"description": "Abdominal pain at least 4 days per month, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not examine the patient."
},
"pain_does_not_resolve_with_constipation_treatment": {
"type": "boolean",
"description": "Pain does not resolve with resolution of the constipation, as assigned (Hyams 2016 Rome IV H2b item 2). Assign true if there is no constipation, or if pain persists after treating constipation. true or false as assigned by the caller. magent does not treat constipation or examine the patient."
}
}
}
},
"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/rome_iv_child_ibs",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"change_in_stool_form": false,
"related_to_defecation": true,
"change_in_stool_frequency": true,
"fulfilled_at_least_2_months": true,
"not_explained_by_another_condition": true,
"abdominal_pain_at_least_4_days_per_month": true,
"pain_does_not_resolve_with_constipation_treatment": true
},
{
"change_in_stool_form": false,
"related_to_defecation": true,
"change_in_stool_frequency": true,
"fulfilled_at_least_2_months": true,
"not_explained_by_another_condition": true,
"abdominal_pain_at_least_4_days_per_month": true,
"pain_does_not_resolve_with_constipation_treatment": true
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/rome_iv_child_ibs",
"count": 2,
"items": [
{
"formula": "rome_iv_child_ibs",
"citation": {
"id": "hyams-2016",
"doi": "10.1053/j.gastro.2016.02.015",
"pmid": "27144632",
"title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent",
"source": "Gastroenterology. 2016;150(6):1456-1468",
"authors": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M"
},
"criteria": [
{
"met": true,
"factor": "abdominal_pain_at_least_4_days_per_month"
},
{
"met": true,
"factor": "related_to_defecation"
},
{
"met": true,
"factor": "change_in_stool_frequency"
},
{
"met": false,
"factor": "change_in_stool_form"
},
{
"met": true,
"factor": "pain_does_not_resolve_with_constipation_treatment"
},
{
"met": true,
"factor": "not_explained_by_another_condition"
},
{
"met": true,
"factor": "fulfilled_at_least_2_months"
},
{
"met": true,
"value": 2,
"factor": "stool_features_ge_1"
}
],
"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.",
"rome_iv_child_ibs": true,
"formula_expression": "rome_iv_child_ibs iff abdominal_pain_at_least_4_days_per_month and stool_features_met >= 1 and pain_does_not_resolve_with_constipation_treatment and not_explained_by_another_condition and fulfilled_at_least_2_months; stool_features_met counts related_to_defecation, change_in_stool_frequency, and change_in_stool_form (Hyams 2016 Rome IV H2b child/adolescent IBS)",
"stool_features_met": 2
},
{
"formula": "rome_iv_child_ibs",
"citation": {
"id": "hyams-2016",
"doi": "10.1053/j.gastro.2016.02.015",
"pmid": "27144632",
"title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent",
"source": "Gastroenterology. 2016;150(6):1456-1468",
"authors": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M"
},
"criteria": [
{
"met": true,
"factor": "abdominal_pain_at_least_4_days_per_month"
},
{
"met": true,
"factor": "related_to_defecation"
},
{
"met": true,
"factor": "change_in_stool_frequency"
},
{
"met": false,
"factor": "change_in_stool_form"
},
{
"met": true,
"factor": "pain_does_not_resolve_with_constipation_treatment"
},
{
"met": true,
"factor": "not_explained_by_another_condition"
},
{
"met": true,
"factor": "fulfilled_at_least_2_months"
},
{
"met": true,
"value": 2,
"factor": "stool_features_ge_1"
}
],
"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.",
"rome_iv_child_ibs": true,
"formula_expression": "rome_iv_child_ibs iff abdominal_pain_at_least_4_days_per_month and stool_features_met >= 1 and pain_does_not_resolve_with_constipation_treatment and not_explained_by_another_condition and fulfilled_at_least_2_months; stool_features_met counts related_to_defecation, change_in_stool_frequency, and change_in_stool_form (Hyams 2016 Rome IV H2b child/adolescent IBS)",
"stool_features_met": 2
}
]
}
},
"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": [
"abdominal_pain_at_least_4_days_per_month",
"related_to_defecation",
"change_in_stool_frequency",
"change_in_stool_form",
"pain_does_not_resolve_with_constipation_treatment",
"not_explained_by_another_condition",
"fulfilled_at_least_2_months"
],
"properties": {
"change_in_stool_form": {
"type": "boolean",
"description": "Pain associated with a change in form (appearance) of stool (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"related_to_defecation": {
"type": "boolean",
"description": "Pain related to defecation (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"change_in_stool_frequency": {
"type": "boolean",
"description": "Pain associated with a change in frequency of stool (one of three stool features; at least one required). true or false as assigned by the caller. magent does not examine the patient."
},
"fulfilled_at_least_2_months": {
"type": "boolean",
"description": "Criteria fulfilled for at least 2 months, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not take a history."
},
"not_explained_by_another_condition": {
"type": "boolean",
"description": "After appropriate evaluation, the symptoms cannot be fully explained by another medical condition, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not examine the patient."
},
"abdominal_pain_at_least_4_days_per_month": {
"type": "boolean",
"description": "Abdominal pain at least 4 days per month, as assigned (Hyams 2016 Rome IV H2b). true or false as assigned by the caller. magent does not examine the patient."
},
"pain_does_not_resolve_with_constipation_treatment": {
"type": "boolean",
"description": "Pain does not resolve with resolution of the constipation, as assigned (Hyams 2016 Rome IV H2b item 2). Assign true if there is no constipation, or if pain persists after treating constipation. true or false as assigned by the caller. magent does not treat constipation or examine the patient."
}
}
},
"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 05:30Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 02:45Z
- 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. 9 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/rome_iv_child_ibs, 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.