magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
Meld-3LiverCirrhosisKim-2021Calculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 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 2026-09-02 08:46Z
—
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/meld_3",
"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/meld_3",
"tags": [
"meld-3",
"liver",
"cirrhosis",
"kim-2021",
"calculator"
],
"mimeType": "application/json",
"description": "Kim 2021 MELD 3.0 from sex, bilirubin, INR, creatinine, sodium, albumin, and dialysis. meld_3 = round(1.33*(female) + 4.56*ln(bilirubin) + 0.82*(137-Na) - 0.24*(137-Na)*ln(bilirubin) + 9.09*ln(INR) + 11.14*ln(creatinine) + 1.85*(3.5-albumin) - 1.83*(3.5-albumin)*ln(creatinine) + 6). Creatinine 1.0-3.0 (dialysis 3.0); bilirubin and INR floor 1.0; sodium 125-137; albumin 1.5-3.5. Not original MELD or MELD-Na. Not a transplant listing or allocation order.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"inr": 1,
"sex": "male",
"dialysis": false,
"albumin_g_l": 35,
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"bilirubin_umol_l": 17.1,
"creatinine_mg_dl": 1,
"creatinine_umol_l": 88.42
}
},
"output": {
"type": "json",
"example": {
"inr": 1,
"sex": "male",
"female": false,
"meld_3": 6,
"formula": "kim_meld_3_2021",
"citation": {
"id": "kim-2021",
"doi": "10.1053/j.gastro.2021.08.050",
"pmid": "34454066",
"title": "MELD 3.0: The Model for End-Stage Liver Disease Updated for the Modern Era",
"source": "Gastroenterology. 2021;161(6):1887-1895.e4",
"authors": "Kim WR, Mannalithara A, Heimbach JK, Kamath PS, Asrani SK, Biggins SW, et al."
},
"dialysis": false,
"inr_used": 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.",
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"creatinine_mg_dl": 1,
"albumin_used_g_dl": 3.5,
"formula_expression": "meld_3 = round(1.33*(female) + 4.56*ln(bilirubin) + 0.82*(137 - Na) - 0.24*(137 - Na)*ln(bilirubin) + 9.09*ln(INR) + 11.14*ln(creatinine) + 1.85*(3.5 - albumin) - 1.83*(3.5 - albumin)*ln(creatinine) + 6)",
"sodium_used_mmol_l": 137,
"bilirubin_used_mg_dl": 1,
"creatinine_used_mg_dl": 1
}
},
"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",
"inr",
"sodium_mmol_l",
"dialysis"
],
"properties": {
"inr": {
"type": "number",
"description": "INR (0.8-10). Kim 2021 floors at 1.0."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used in the Kim 2021 female term (female adds 1.33)."
},
"dialysis": {
"type": "boolean",
"description": "Dialysis twice in the prior week. true sets creatinine used to 3.0 (Kim 2021 ceiling)."
},
"albumin_g_l": {
"type": "number",
"description": "Serum albumin in g/L (10-60). Converted as g/dL = g/L / 10."
},
"albumin_g_dl": {
"type": "number",
"description": "Serum albumin in g/dL (1.0-6.0). Provide this or albumin_g_l. Kim 2021 clamps 1.5-3.5."
},
"sodium_mmol_l": {
"type": "number",
"description": "Serum sodium in mmol/L (110-160). Kim 2021 clamps 125-137."
},
"bilirubin_mg_dl": {
"type": "number",
"description": "Total bilirubin in mg/dL (0.1-40). Provide this or bilirubin_umol_l. Kim 2021 floors at 1.0."
},
"bilirubin_umol_l": {
"type": "number",
"description": "Total bilirubin in µmol/L (2-684). Converted as mg/dL = µmol/L / 17.1."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l. Kim 2021 floors at 1.0 and caps at 3.0."
},
"creatinine_umol_l": {
"type": "number",
"description": "Serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42."
}
}
}
},
"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/meld_3",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"inr": 1,
"sex": "male",
"dialysis": false,
"albumin_g_l": 35,
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"bilirubin_umol_l": 17.1,
"creatinine_mg_dl": 1,
"creatinine_umol_l": 88.42
},
{
"inr": 1,
"sex": "male",
"dialysis": false,
"albumin_g_l": 35,
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"bilirubin_umol_l": 17.1,
"creatinine_mg_dl": 1,
"creatinine_umol_l": 88.42
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/meld_3",
"count": 2,
"items": [
{
"inr": 1,
"sex": "male",
"female": false,
"meld_3": 6,
"formula": "kim_meld_3_2021",
"citation": {
"id": "kim-2021",
"doi": "10.1053/j.gastro.2021.08.050",
"pmid": "34454066",
"title": "MELD 3.0: The Model for End-Stage Liver Disease Updated for the Modern Era",
"source": "Gastroenterology. 2021;161(6):1887-1895.e4",
"authors": "Kim WR, Mannalithara A, Heimbach JK, Kamath PS, Asrani SK, Biggins SW, et al."
},
"dialysis": false,
"inr_used": 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.",
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"creatinine_mg_dl": 1,
"albumin_used_g_dl": 3.5,
"formula_expression": "meld_3 = round(1.33*(female) + 4.56*ln(bilirubin) + 0.82*(137 - Na) - 0.24*(137 - Na)*ln(bilirubin) + 9.09*ln(INR) + 11.14*ln(creatinine) + 1.85*(3.5 - albumin) - 1.83*(3.5 - albumin)*ln(creatinine) + 6)",
"sodium_used_mmol_l": 137,
"bilirubin_used_mg_dl": 1,
"creatinine_used_mg_dl": 1
},
{
"inr": 1,
"sex": "male",
"female": false,
"meld_3": 6,
"formula": "kim_meld_3_2021",
"citation": {
"id": "kim-2021",
"doi": "10.1053/j.gastro.2021.08.050",
"pmid": "34454066",
"title": "MELD 3.0: The Model for End-Stage Liver Disease Updated for the Modern Era",
"source": "Gastroenterology. 2021;161(6):1887-1895.e4",
"authors": "Kim WR, Mannalithara A, Heimbach JK, Kamath PS, Asrani SK, Biggins SW, et al."
},
"dialysis": false,
"inr_used": 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.",
"albumin_g_dl": 3.5,
"sodium_mmol_l": 137,
"bilirubin_mg_dl": 1,
"creatinine_mg_dl": 1,
"albumin_used_g_dl": 3.5,
"formula_expression": "meld_3 = round(1.33*(female) + 4.56*ln(bilirubin) + 0.82*(137 - Na) - 0.24*(137 - Na)*ln(bilirubin) + 9.09*ln(INR) + 11.14*ln(creatinine) + 1.85*(3.5 - albumin) - 1.83*(3.5 - albumin)*ln(creatinine) + 6)",
"sodium_used_mmol_l": 137,
"bilirubin_used_mg_dl": 1,
"creatinine_used_mg_dl": 1
}
]
}
},
"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",
"inr",
"sodium_mmol_l",
"dialysis"
],
"properties": {
"inr": {
"type": "number",
"description": "INR (0.8-10). Kim 2021 floors at 1.0."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Sex used in the Kim 2021 female term (female adds 1.33)."
},
"dialysis": {
"type": "boolean",
"description": "Dialysis twice in the prior week. true sets creatinine used to 3.0 (Kim 2021 ceiling)."
},
"albumin_g_l": {
"type": "number",
"description": "Serum albumin in g/L (10-60). Converted as g/dL = g/L / 10."
},
"albumin_g_dl": {
"type": "number",
"description": "Serum albumin in g/dL (1.0-6.0). Provide this or albumin_g_l. Kim 2021 clamps 1.5-3.5."
},
"sodium_mmol_l": {
"type": "number",
"description": "Serum sodium in mmol/L (110-160). Kim 2021 clamps 125-137."
},
"bilirubin_mg_dl": {
"type": "number",
"description": "Total bilirubin in mg/dL (0.1-40). Provide this or bilirubin_umol_l. Kim 2021 floors at 1.0."
},
"bilirubin_umol_l": {
"type": "number",
"description": "Total bilirubin in µmol/L (2-684). Converted as mg/dL = µmol/L / 17.1."
},
"creatinine_mg_dl": {
"type": "number",
"description": "Serum creatinine in mg/dL (0.1-20). Provide this or creatinine_umol_l. Kim 2021 floors at 1.0 and caps at 3.0."
},
"creatinine_umol_l": {
"type": "number",
"description": "Serum creatinine in µmol/L (9-1768). Converted as mg/dL = µmol/L / 88.42."
}
}
},
"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
- 2026-09-02 08:46Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 00:15Z
- 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. 7 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/meld_3, 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.