magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
Framingham-hfHeart-failureHemodynamicsChfCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 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 12:55Z
—
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.
{
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"resourceUrl": "https://api.magentlab.com/api/calc/framingham_hf",
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],
"resource": {
"url": "https://api.magentlab.com/api/calc/framingham_hf",
"tags": [
"framingham-hf",
"heart-failure",
"hemodynamics",
"chf",
"calculator"
],
"mimeType": "application/json",
"description": "McKee 1971 Framingham CHF criteria. Definite if two major, or one major plus two minor, are concurrent. Nine major and seven minor caller-assigned flags. Weight loss ≥4.5 kg in 5 days in response to treatment is dual: major if that is definite, else minor if that is definite, else unused. major_count and minor_count are the fixed flags only. Not a medical device, not an echocardiographic diagnosis, and not HFrEF or HFpEF staging.",
"serviceName": "magent"
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"extensions": {
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"tachycardia_ge_120": false,
"dyspnea_on_exertion": false,
"hepatojugular_reflux": false,
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"acute_pulmonary_edema": false,
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}
},
"output": {
"type": "json",
"example": {
"formula": "framingham_hf",
"citation": {
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"doi": "10.1056/NEJM197112232852601",
"pmid": "5122894",
"title": "The natural history of congestive heart failure: the Framingham study",
"source": "N Engl J Med. 1971;285(26):1441-1446",
"authors": "McKee PA, Castelli WP, McNamara PM, Kannel WB"
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{
"met": false,
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{
"met": false,
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{
"met": false,
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{
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{
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{
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{
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"factor": "dyspnea_on_exertion"
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{
"met": false,
"factor": "hepatomegaly"
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{
"met": false,
"factor": "pleural_effusion"
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{
"met": false,
"factor": "vital_capacity_decreased_third"
},
{
"met": false,
"factor": "tachycardia_ge_120"
},
{
"met": false,
"factor": "weight_loss_45kg_5d_treatment"
}
],
"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.",
"major_count": 0,
"minor_count": 0,
"classification": "not_definite",
"formula_expression": "definite iff 2 major OR (1 major AND 2 minor) concurrent (McKee 1971). weight_loss_45kg_5d_treatment (≥4.5 kg in 5 days in response to treatment) counts as major if that assignment is definite, else as minor if that assignment is definite, else unused. major_count is the 9 fixed majors; minor_count is the 7 fixed minors",
"weight_loss_45kg_5d_treatment": false
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
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"required": [
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"properties": {
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"required": [
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],
"properties": {
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},
"method": {
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"HEAD",
"DELETE"
],
"type": "string"
},
"headers": {
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},
"queryParams": {
"type": "object",
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"neck_vein_distention",
"rales",
"cardiomegaly",
"acute_pulmonary_edema",
"s3_gallop",
"venous_pressure_gt_16",
"circulation_time_ge_25",
"hepatojugular_reflux",
"ankle_edema",
"night_cough",
"dyspnea_on_exertion",
"hepatomegaly",
"pleural_effusion",
"vital_capacity_decreased_third",
"tachycardia_ge_120",
"weight_loss_45kg_5d_treatment"
],
"properties": {
"rales": {
"type": "boolean",
"description": "Rales (McKee 1971 major). true or false as assigned by the caller. magent does not auscultate the lungs."
},
"s3_gallop": {
"type": "boolean",
"description": "S3 gallop (McKee 1971 major). true or false as assigned by the caller. magent does not auscultate the heart."
},
"ankle_edema": {
"type": "boolean",
"description": "Ankle edema (McKee 1971 minor). true or false as assigned by the caller. magent does not examine the ankles."
},
"night_cough": {
"type": "boolean",
"description": "Night cough (McKee 1971 minor). true or false as assigned by the caller. magent does not take a history."
},
"cardiomegaly": {
"type": "boolean",
"description": "Cardiomegaly (McKee 1971 major). true or false as assigned by the caller. magent does not interpret a chest radiograph."
},
"hepatomegaly": {
"type": "boolean",
"description": "Hepatomegaly (McKee 1971 minor). true or false as assigned by the caller. magent does not examine the liver."
},
"pleural_effusion": {
"type": "boolean",
"description": "Pleural effusion (McKee 1971 minor). true or false as assigned by the caller. magent does not interpret imaging."
},
"pnd_or_orthopnea": {
"type": "boolean",
"description": "Paroxysmal nocturnal dyspnea or orthopnea (McKee 1971 major). true or false as assigned by the caller. magent does not take a history."
},
"tachycardia_ge_120": {
"type": "boolean",
"description": "Tachycardia ≥120 per minute (McKee 1971 minor). true or false as assigned by the caller. magent does not measure heart rate."
},
"dyspnea_on_exertion": {
"type": "boolean",
"description": "Dyspnea on exertion (McKee 1971 minor). true or false as assigned by the caller. magent does not take a history."
},
"hepatojugular_reflux": {
"type": "boolean",
"description": "Hepatojugular reflux (McKee 1971 major). true or false as assigned by the caller. magent does not examine the patient."
},
"neck_vein_distention": {
"type": "boolean",
"description": "Neck-vein distention (McKee 1971 major). true or false as assigned by the caller. magent does not examine the neck veins."
},
"acute_pulmonary_edema": {
"type": "boolean",
"description": "Acute pulmonary edema (McKee 1971 major). true or false as assigned by the caller. magent does not diagnose pulmonary edema."
},
"venous_pressure_gt_16": {
"type": "boolean",
"description": "Increased venous pressure >16 cm of water (McKee 1971 major). true or false as assigned by the caller. magent does not measure venous pressure."
},
"circulation_time_ge_25": {
"type": "boolean",
"description": "Circulation time ≥25 seconds (McKee 1971 major). true or false as assigned by the caller. magent does not measure circulation time."
},
"weight_loss_45kg_5d_treatment": {
"type": "boolean",
"description": "Weight loss ≥4.5 kg in 5 days in response to treatment (McKee 1971 dual major-or-minor). true or false as assigned by the caller. Counted as major if that assignment is definite, else as minor if that assignment is definite, else unused. magent does not weigh the patient."
},
"vital_capacity_decreased_third": {
"type": "boolean",
"description": "Vital capacity decreased one third from maximum (McKee 1971 minor). true or false as assigned by the caller. magent does not measure vital capacity."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
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"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/framingham_hf",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
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"ankle_edema": false,
"night_cough": false,
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"pleural_effusion": false,
"pnd_or_orthopnea": false,
"tachycardia_ge_120": false,
"dyspnea_on_exertion": false,
"hepatojugular_reflux": false,
"neck_vein_distention": false,
"acute_pulmonary_edema": false,
"venous_pressure_gt_16": false,
"circulation_time_ge_25": false,
"weight_loss_45kg_5d_treatment": false,
"vital_capacity_decreased_third": false
},
{
"rales": false,
"s3_gallop": false,
"ankle_edema": false,
"night_cough": false,
"cardiomegaly": false,
"hepatomegaly": false,
"pleural_effusion": false,
"pnd_or_orthopnea": false,
"tachycardia_ge_120": false,
"dyspnea_on_exertion": false,
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"neck_vein_distention": false,
"acute_pulmonary_edema": false,
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},
"type": "http",
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},
"output": {
"type": "json",
"example": {
"path": "/api/calc/framingham_hf",
"count": 2,
"items": [
{
"formula": "framingham_hf",
"citation": {
"id": "mckee-1971",
"doi": "10.1056/NEJM197112232852601",
"pmid": "5122894",
"title": "The natural history of congestive heart failure: the Framingham study",
"source": "N Engl J Med. 1971;285(26):1441-1446",
"authors": "McKee PA, Castelli WP, McNamara PM, Kannel WB"
},
"components": [
{
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{
"met": false,
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{
"met": false,
"factor": "rales"
},
{
"met": false,
"factor": "cardiomegaly"
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{
"met": false,
"factor": "acute_pulmonary_edema"
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{
"met": false,
"factor": "s3_gallop"
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{
"met": false,
"factor": "venous_pressure_gt_16"
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{
"met": false,
"factor": "circulation_time_ge_25"
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{
"met": false,
"factor": "hepatojugular_reflux"
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{
"met": false,
"factor": "ankle_edema"
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{
"met": false,
"factor": "night_cough"
},
{
"met": false,
"factor": "dyspnea_on_exertion"
},
{
"met": false,
"factor": "hepatomegaly"
},
{
"met": false,
"factor": "pleural_effusion"
},
{
"met": false,
"factor": "vital_capacity_decreased_third"
},
{
"met": false,
"factor": "tachycardia_ge_120"
},
{
"met": false,
"factor": "weight_loss_45kg_5d_treatment"
}
],
"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.",
"major_count": 0,
"minor_count": 0,
"classification": "not_definite",
"formula_expression": "definite iff 2 major OR (1 major AND 2 minor) concurrent (McKee 1971). weight_loss_45kg_5d_treatment (≥4.5 kg in 5 days in response to treatment) counts as major if that assignment is definite, else as minor if that assignment is definite, else unused. major_count is the 9 fixed majors; minor_count is the 7 fixed minors",
"weight_loss_45kg_5d_treatment": false
},
{
"formula": "framingham_hf",
"citation": {
"id": "mckee-1971",
"doi": "10.1056/NEJM197112232852601",
"pmid": "5122894",
"title": "The natural history of congestive heart failure: the Framingham study",
"source": "N Engl J Med. 1971;285(26):1441-1446",
"authors": "McKee PA, Castelli WP, McNamara PM, Kannel WB"
},
"components": [
{
"met": false,
"factor": "pnd_or_orthopnea"
},
{
"met": false,
"factor": "neck_vein_distention"
},
{
"met": false,
"factor": "rales"
},
{
"met": false,
"factor": "cardiomegaly"
},
{
"met": false,
"factor": "acute_pulmonary_edema"
},
{
"met": false,
"factor": "s3_gallop"
},
{
"met": false,
"factor": "venous_pressure_gt_16"
},
{
"met": false,
"factor": "circulation_time_ge_25"
},
{
"met": false,
"factor": "hepatojugular_reflux"
},
{
"met": false,
"factor": "ankle_edema"
},
{
"met": false,
"factor": "night_cough"
},
{
"met": false,
"factor": "dyspnea_on_exertion"
},
{
"met": false,
"factor": "hepatomegaly"
},
{
"met": false,
"factor": "pleural_effusion"
},
{
"met": false,
"factor": "vital_capacity_decreased_third"
},
{
"met": false,
"factor": "tachycardia_ge_120"
},
{
"met": false,
"factor": "weight_loss_45kg_5d_treatment"
}
],
"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.",
"major_count": 0,
"minor_count": 0,
"classification": "not_definite",
"formula_expression": "definite iff 2 major OR (1 major AND 2 minor) concurrent (McKee 1971). weight_loss_45kg_5d_treatment (≥4.5 kg in 5 days in response to treatment) counts as major if that assignment is definite, else as minor if that assignment is definite, else unused. major_count is the 9 fixed majors; minor_count is the 7 fixed minors",
"weight_loss_45kg_5d_treatment": false
}
]
}
},
"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": [
"pnd_or_orthopnea",
"neck_vein_distention",
"rales",
"cardiomegaly",
"acute_pulmonary_edema",
"s3_gallop",
"venous_pressure_gt_16",
"circulation_time_ge_25",
"hepatojugular_reflux",
"ankle_edema",
"night_cough",
"dyspnea_on_exertion",
"hepatomegaly",
"pleural_effusion",
"vital_capacity_decreased_third",
"tachycardia_ge_120",
"weight_loss_45kg_5d_treatment"
],
"properties": {
"rales": {
"type": "boolean",
"description": "Rales (McKee 1971 major). true or false as assigned by the caller. magent does not auscultate the lungs."
},
"s3_gallop": {
"type": "boolean",
"description": "S3 gallop (McKee 1971 major). true or false as assigned by the caller. magent does not auscultate the heart."
},
"ankle_edema": {
"type": "boolean",
"description": "Ankle edema (McKee 1971 minor). true or false as assigned by the caller. magent does not examine the ankles."
},
"night_cough": {
"type": "boolean",
"description": "Night cough (McKee 1971 minor). true or false as assigned by the caller. magent does not take a history."
},
"cardiomegaly": {
"type": "boolean",
"description": "Cardiomegaly (McKee 1971 major). true or false as assigned by the caller. magent does not interpret a chest radiograph."
},
"hepatomegaly": {
"type": "boolean",
"description": "Hepatomegaly (McKee 1971 minor). true or false as assigned by the caller. magent does not examine the liver."
},
"pleural_effusion": {
"type": "boolean",
"description": "Pleural effusion (McKee 1971 minor). true or false as assigned by the caller. magent does not interpret imaging."
},
"pnd_or_orthopnea": {
"type": "boolean",
"description": "Paroxysmal nocturnal dyspnea or orthopnea (McKee 1971 major). true or false as assigned by the caller. magent does not take a history."
},
"tachycardia_ge_120": {
"type": "boolean",
"description": "Tachycardia ≥120 per minute (McKee 1971 minor). true or false as assigned by the caller. magent does not measure heart rate."
},
"dyspnea_on_exertion": {
"type": "boolean",
"description": "Dyspnea on exertion (McKee 1971 minor). true or false as assigned by the caller. magent does not take a history."
},
"hepatojugular_reflux": {
"type": "boolean",
"description": "Hepatojugular reflux (McKee 1971 major). true or false as assigned by the caller. magent does not examine the patient."
},
"neck_vein_distention": {
"type": "boolean",
"description": "Neck-vein distention (McKee 1971 major). true or false as assigned by the caller. magent does not examine the neck veins."
},
"acute_pulmonary_edema": {
"type": "boolean",
"description": "Acute pulmonary edema (McKee 1971 major). true or false as assigned by the caller. magent does not diagnose pulmonary edema."
},
"venous_pressure_gt_16": {
"type": "boolean",
"description": "Increased venous pressure >16 cm of water (McKee 1971 major). true or false as assigned by the caller. magent does not measure venous pressure."
},
"circulation_time_ge_25": {
"type": "boolean",
"description": "Circulation time ≥25 seconds (McKee 1971 major). true or false as assigned by the caller. magent does not measure circulation time."
},
"weight_loss_45kg_5d_treatment": {
"type": "boolean",
"description": "Weight loss ≥4.5 kg in 5 days in response to treatment (McKee 1971 dual major-or-minor). true or false as assigned by the caller. Counted as major if that assignment is definite, else as minor if that assignment is definite, else unused. magent does not weigh the patient."
},
"vital_capacity_decreased_third": {
"type": "boolean",
"description": "Vital capacity decreased one third from maximum (McKee 1971 minor). true or false as assigned by the caller. magent does not measure vital capacity."
}
}
},
"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 12:55Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 06:45Z
- 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. 14 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
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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/framingham_hf, 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.