magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Dataofflineeip155:8453Exactvia cdp
Reach-bHccHepatitis-bLiverCalculator
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 13:04Z
—
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/reach_b",
"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/reach_b",
"tags": [
"reach-b",
"hcc",
"hepatitis-b",
"liver",
"calculator"
],
"mimeType": "application/json",
"description": "Yang 2011 REACH-B 17-point HCC risk (non-cirrhotic REVEAL-HBV). Sex female 0, male 2; age 30-65 (30-34 0 through 60-65 6); ALT U/L <15 0, 15-44 1, >=45 2; HBeAg positive 2; HBV DNA copies/mL <10000 0, 10000-99999 3, 100000-999999 5, >=1000000 4. Returns score 0-17 and published 3/5/10-year percents. Not a diagnosis, not a biopsy, not for cirrhosis. magent does not assay ALT or HBV DNA.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 30,
"sex": "female",
"alt_u_l": 14,
"hbeag_positive": false,
"hbv_dna_copies_per_ml": 200
}
},
"output": {
"type": "json",
"example": {
"sex": "female",
"score": 0,
"alt_u_l": 14,
"formula": "reach_b",
"citation": {
"id": "yang-2011",
"doi": "10.1016/S1470-2045(11)70077-8",
"pmid": "21497551",
"title": "Risk estimation for hepatocellular carcinoma in chronic hepatitis B (REACH-B): development and validation of a predictive score",
"source": "Lancet Oncol. 2011;12(6):568-574",
"authors": "Yang HI, Yuen MF, Chan HL, et al"
},
"age_years": 30,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"value": 30,
"factor": "age",
"points": 0,
"present": false
},
{
"value": 14,
"factor": "alt",
"points": 0,
"present": false
},
{
"factor": "hbeag",
"points": 0,
"present": false
},
{
"value": 200,
"factor": "hbv_dna",
"points": 0,
"present": false
}
],
"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.",
"hbeag_positive": false,
"risk_3y_percent": 0,
"risk_5y_percent": 0,
"risk_10y_percent": 0,
"formula_expression": "REACH-B = sex + age + ALT + HBeAg + HBV DNA copies/mL; female 0, male 2; age 30-34 -> 0, 35-39 -> 1, 40-44 -> 2, 45-49 -> 3, 50-54 -> 4, 55-59 -> 5, 60-65 -> 6; ALT <15 -> 0, 15-44 -> 1, >=45 -> 2; HBeAg positive 2; HBV DNA copies/mL <300 -> 0, 300-9999 -> 0, 10000-99999 -> 3, 100000-999999 -> 5, >=1000000 -> 4; max 17; 3/5/10-year HCC percent from Yang 2011 score table",
"hbv_dna_copies_per_ml": 200
}
},
"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": [
"sex",
"age",
"alt_u_l",
"hbeag_positive",
"hbv_dna_copies_per_ml"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years. Yang 2011 derivation 30-65 only: 30-34 scores 0; 35-39 scores 1; 40-44 scores 2; 45-49 scores 3; 50-54 scores 4; 55-59 scores 5; 60-65 scores 6. Age 34 scores 0; 35 scores 1; 65 scores 6. Age outside 30-65 is rejected. This tool does not score age >=65 as 7."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male. Yang 2011: female scores 0; male scores 2."
},
"alt_u_l": {
"type": "number",
"description": "Alanine aminotransferase in U/L (1-10000). Caller-assigned; magent does not assay ALT. Yang 2011: <15 scores 0; 15-44 scores 1; >=45 scores 2. ALT 14 scores 0; 15 and 44 score 1; 45 scores 2."
},
"hbeag_positive": {
"type": "boolean",
"description": "HBeAg positive as assigned by the caller (Yang 2011). true scores 2; false scores 0. magent does not assay HBeAg."
},
"hbv_dna_copies_per_ml": {
"type": "integer",
"description": "HBV DNA in copies/mL (integer 0-10000000000). Yang 2011 uses copies/mL, not IU/mL. magent does not assay HBV DNA and does not convert units. <300 scores 0; 300-9999 scores 0; 10000-99999 scores 3; 100000-999999 scores 5; >=1000000 scores 4 (non-monotonic: 10^6 scores 4, 10^5 to 10^6-1 scores 5)."
}
}
}
},
"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/reach_b",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 30,
"sex": "female",
"alt_u_l": 14,
"hbeag_positive": false,
"hbv_dna_copies_per_ml": 200
},
{
"age": 30,
"sex": "female",
"alt_u_l": 14,
"hbeag_positive": false,
"hbv_dna_copies_per_ml": 200
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/reach_b",
"count": 2,
"items": [
{
"sex": "female",
"score": 0,
"alt_u_l": 14,
"formula": "reach_b",
"citation": {
"id": "yang-2011",
"doi": "10.1016/S1470-2045(11)70077-8",
"pmid": "21497551",
"title": "Risk estimation for hepatocellular carcinoma in chronic hepatitis B (REACH-B): development and validation of a predictive score",
"source": "Lancet Oncol. 2011;12(6):568-574",
"authors": "Yang HI, Yuen MF, Chan HL, et al"
},
"age_years": 30,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"value": 30,
"factor": "age",
"points": 0,
"present": false
},
{
"value": 14,
"factor": "alt",
"points": 0,
"present": false
},
{
"factor": "hbeag",
"points": 0,
"present": false
},
{
"value": 200,
"factor": "hbv_dna",
"points": 0,
"present": false
}
],
"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.",
"hbeag_positive": false,
"risk_3y_percent": 0,
"risk_5y_percent": 0,
"risk_10y_percent": 0,
"formula_expression": "REACH-B = sex + age + ALT + HBeAg + HBV DNA copies/mL; female 0, male 2; age 30-34 -> 0, 35-39 -> 1, 40-44 -> 2, 45-49 -> 3, 50-54 -> 4, 55-59 -> 5, 60-65 -> 6; ALT <15 -> 0, 15-44 -> 1, >=45 -> 2; HBeAg positive 2; HBV DNA copies/mL <300 -> 0, 300-9999 -> 0, 10000-99999 -> 3, 100000-999999 -> 5, >=1000000 -> 4; max 17; 3/5/10-year HCC percent from Yang 2011 score table",
"hbv_dna_copies_per_ml": 200
},
{
"sex": "female",
"score": 0,
"alt_u_l": 14,
"formula": "reach_b",
"citation": {
"id": "yang-2011",
"doi": "10.1016/S1470-2045(11)70077-8",
"pmid": "21497551",
"title": "Risk estimation for hepatocellular carcinoma in chronic hepatitis B (REACH-B): development and validation of a predictive score",
"source": "Lancet Oncol. 2011;12(6):568-574",
"authors": "Yang HI, Yuen MF, Chan HL, et al"
},
"age_years": 30,
"max_score": 17,
"components": [
{
"value": "female",
"factor": "sex",
"points": 0,
"present": false
},
{
"value": 30,
"factor": "age",
"points": 0,
"present": false
},
{
"value": 14,
"factor": "alt",
"points": 0,
"present": false
},
{
"factor": "hbeag",
"points": 0,
"present": false
},
{
"value": 200,
"factor": "hbv_dna",
"points": 0,
"present": false
}
],
"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.",
"hbeag_positive": false,
"risk_3y_percent": 0,
"risk_5y_percent": 0,
"risk_10y_percent": 0,
"formula_expression": "REACH-B = sex + age + ALT + HBeAg + HBV DNA copies/mL; female 0, male 2; age 30-34 -> 0, 35-39 -> 1, 40-44 -> 2, 45-49 -> 3, 50-54 -> 4, 55-59 -> 5, 60-65 -> 6; ALT <15 -> 0, 15-44 -> 1, >=45 -> 2; HBeAg positive 2; HBV DNA copies/mL <300 -> 0, 300-9999 -> 0, 10000-99999 -> 3, 100000-999999 -> 5, >=1000000 -> 4; max 17; 3/5/10-year HCC percent from Yang 2011 score table",
"hbv_dna_copies_per_ml": 200
}
]
}
},
"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": [
"sex",
"age",
"alt_u_l",
"hbeag_positive",
"hbv_dna_copies_per_ml"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years. Yang 2011 derivation 30-65 only: 30-34 scores 0; 35-39 scores 1; 40-44 scores 2; 45-49 scores 3; 50-54 scores 4; 55-59 scores 5; 60-65 scores 6. Age 34 scores 0; 35 scores 1; 65 scores 6. Age outside 30-65 is rejected. This tool does not score age >=65 as 7."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "female or male. Yang 2011: female scores 0; male scores 2."
},
"alt_u_l": {
"type": "number",
"description": "Alanine aminotransferase in U/L (1-10000). Caller-assigned; magent does not assay ALT. Yang 2011: <15 scores 0; 15-44 scores 1; >=45 scores 2. ALT 14 scores 0; 15 and 44 score 1; 45 scores 2."
},
"hbeag_positive": {
"type": "boolean",
"description": "HBeAg positive as assigned by the caller (Yang 2011). true scores 2; false scores 0. magent does not assay HBeAg."
},
"hbv_dna_copies_per_ml": {
"type": "integer",
"description": "HBV DNA in copies/mL (integer 0-10000000000). Yang 2011 uses copies/mL, not IU/mL. magent does not assay HBV DNA and does not convert units. <300 scores 0; 300-9999 scores 0; 10000-99999 scores 3; 100000-999999 scores 5; >=1000000 scores 4 (non-monotonic: 10^6 scores 4, 10^5 to 10^6-1 scores 5)."
}
}
},
"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 13:04Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 11:46Z
- 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.
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/reach_b, 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.