Roundhouse

magent

Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.

Tradingofflineeip155:8453Exactvia cdp
https://api.magentlab.com/api/calc/ascvd_pce
AscvdPce-2013LipidsCvd-riskCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 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 2026-09-03 06:37Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2

The 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/ascvd_pce",
        "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/ascvd_pce",
    "tags": [
      "ascvd",
      "pce-2013",
      "lipids",
      "cvd-risk",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "Goff 2013 ACC/AHA pooled-cohort 10-year hard ASCVD percent for age 40-79 from sex, caller-assigned white or african_american cohort, total and HDL cholesterol, treated or untreated systolic BP, smoking, and diabetes. Table A coefficients. Caller assigns cohort; magent does not assign race and does not apply Recommendation 2 as a silent swap. Not PREVENT 2024, not Framingham CHD, not SCORE2, not a diagnosis or statin order. magent does not assay lipids.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "age": 55,
            "sex": "female",
            "cohort": "white",
            "smoker": false,
            "diabetes": false,
            "hdl_mg_dl": 50,
            "sbp_mm_hg": 120,
            "antihypertensive": false,
            "total_cholesterol_mg_dl": 213
          }
        },
        "output": {
          "type": "json",
          "example": {
            "age": 55,
            "sex": "female",
            "cohort": "white",
            "smoker": false,
            "formula": "ascvd_pce",
            "citation": {
              "id": "goff-2013-pce",
              "doi": "10.1161/01.cir.0000437741.48606.98",
              "pmid": "24222018",
              "title": "2013 ACC/AHA Guideline on the Assessment of Cardiovascular Risk: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines",
              "source": "Circulation. 2014;129(25 Suppl 2):S49-S73",
              "authors": "Goff DC Jr, Lloyd-Jones DM, Bennett G, Coady S, D'Agostino RB, Gibbons R, Greenland P, Lackland DT, Levy D, O'Donnell CJ, Robinson JG, Schwartz JS, Shero ST, Smith SC Jr, Sorlie P, Stone NJ, Wilson PW"
            },
            "diabetes": false,
            "hdl_mg_dl": 50,
            "sbp_mm_hg": 120,
            "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.",
            "individual_sum": -29.6767,
            "antihypertensive": false,
            "formula_expression": "10-year hard ASCVD % = 100*(1-S10**exp(individualSum-meanSum)); Goff 2013 Table A; Ln=natural log; age 40-79; cohort white|african_american (caller-assigned paper terms; not param race; Recommendation 2 is not a silent swap); treated vs untreated SBP (not both); interactions only where Table A is not N/A; WHITE WOMEN: ln_age -29.799, ln_age^2 4.884, ln_tc 13.540, ln_age*ln_tc -3.114, ln_hdl -13.578, ln_age*ln_hdl 3.149, ln_treated_sbp 2.019, ln_untreated_sbp 1.957, smoker 7.574, ln_age*smoker -1.665, diabetes 0.661, meanSum -29.18, S10 0.9665; AFRICAN AMERICAN WOMEN: ln_age 17.114, ln_tc 0.940, ln_hdl -18.920, ln_age*ln_hdl 4.475, ln_treated_sbp 29.291, ln_age*ln_treated_sbp -6.432, ln_untreated_sbp 27.820, ln_age*ln_untreated_sbp -6.087, smoker 0.691, diabetes 0.874, meanSum 86.61, S10 0.9533; WHITE MEN: ln_age 12.344, ln_tc 11.853, ln_age*ln_tc -2.664, ln_hdl -7.990, ln_age*ln_hdl 1.769, ln_treated_sbp 1.797, ln_untreated_sbp 1.764, smoker 7.837, ln_age*smoker -1.795, diabetes 0.658, meanSum 61.18, S10 0.9144; AFRICAN AMERICAN MEN: ln_age 2.469, ln_tc 0.302, ln_hdl -0.307, ln_treated_sbp 1.916, ln_untreated_sbp 1.809, smoker 0.549, diabetes 0.645, meanSum 19.54, S10 0.8954; round 1 decimal; not PREVENT 2024; not Framingham CHD; not SCORE2; not a statin order",
            "ten_year_ascvd_percent": 2.1,
            "total_cholesterol_mg_dl": 213
          }
        },
        "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": [
                  "age",
                  "sex",
                  "cohort",
                  "total_cholesterol_mg_dl",
                  "hdl_mg_dl",
                  "sbp_mm_hg",
                  "antihypertensive",
                  "smoker",
                  "diabetes"
                ],
                "properties": {
                  "age": {
                    "type": "integer",
                    "description": "Age in years (integer 40-79). Goff 2013 Table A 10-year hard ASCVD is for ages 40-79. magent does not take a date of birth."
                  },
                  "sex": {
                    "enum": [
                      "female",
                      "male"
                    ],
                    "type": "string",
                    "description": "Sex used by the sex-specific Table A coefficients (female or male). Not cohort."
                  },
                  "cohort": {
                    "enum": [
                      "white",
                      "african_american"
                    ],
                    "type": "string",
                    "description": "Caller-assigned cohort as used in Goff 2013 Table A: white or african_american (paper terms). Not param race. magent does not assign race or ethnicity. Recommendation 2 (use the White equations for other groups) is not applied as a silent swap; other strings are rejected."
                  },
                  "smoker": {
                    "type": "boolean",
                    "description": "Current cigarette smoking as assigned by the caller (true or false). Adds the Table A smoker term and ln(age) × smoker when that cell is not N/A. magent does not take a smoking history."
                  },
                  "diabetes": {
                    "type": "boolean",
                    "description": "Diabetes as assigned by the caller (true or false). Adds the Table A diabetes term. magent does not assay glucose."
                  },
                  "hdl_mg_dl": {
                    "type": "number",
                    "description": "HDL cholesterol in mg/dL (5-150). Enters as ln(HDL-C). magent does not assay lipids."
                  },
                  "sbp_mm_hg": {
                    "type": "number",
                    "description": "Systolic blood pressure in mm Hg (50-250). Enters as ln(SBP) with the treated or untreated Table A coefficient according to antihypertensive. magent does not measure blood pressure."
                  },
                  "antihypertensive": {
                    "type": "boolean",
                    "description": "Current antihypertensive treatment as assigned by the caller (true or false). true uses the Table A treated-SBP coefficient (and age × treated SBP when that cell is not N/A). false uses untreated SBP. Not both."
                  },
                  "total_cholesterol_mg_dl": {
                    "type": "number",
                    "description": "Total cholesterol in mg/dL (50-800). Enters as ln(total cholesterol). magent does not assay lipids."
                  }
                }
              }
            },
            "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/ascvd_pce",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "age": 55,
              "sex": "female",
              "cohort": "white",
              "smoker": false,
              "diabetes": false,
              "hdl_mg_dl": 50,
              "sbp_mm_hg": 120,
              "antihypertensive": false,
              "total_cholesterol_mg_dl": 213
            },
            {
              "age": 55,
              "sex": "female",
              "cohort": "white",
              "smoker": false,
              "diabetes": false,
              "hdl_mg_dl": 50,
              "sbp_mm_hg": 120,
              "antihypertensive": false,
              "total_cholesterol_mg_dl": 213
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/ascvd_pce",
          "count": 2,
          "items": [
            {
              "age": 55,
              "sex": "female",
              "cohort": "white",
              "smoker": false,
              "formula": "ascvd_pce",
              "citation": {
                "id": "goff-2013-pce",
                "doi": "10.1161/01.cir.0000437741.48606.98",
                "pmid": "24222018",
                "title": "2013 ACC/AHA Guideline on the Assessment of Cardiovascular Risk: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines",
                "source": "Circulation. 2014;129(25 Suppl 2):S49-S73",
                "authors": "Goff DC Jr, Lloyd-Jones DM, Bennett G, Coady S, D'Agostino RB, Gibbons R, Greenland P, Lackland DT, Levy D, O'Donnell CJ, Robinson JG, Schwartz JS, Shero ST, Smith SC Jr, Sorlie P, Stone NJ, Wilson PW"
              },
              "diabetes": false,
              "hdl_mg_dl": 50,
              "sbp_mm_hg": 120,
              "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.",
              "individual_sum": -29.6767,
              "antihypertensive": false,
              "formula_expression": "10-year hard ASCVD % = 100*(1-S10**exp(individualSum-meanSum)); Goff 2013 Table A; Ln=natural log; age 40-79; cohort white|african_american (caller-assigned paper terms; not param race; Recommendation 2 is not a silent swap); treated vs untreated SBP (not both); interactions only where Table A is not N/A; WHITE WOMEN: ln_age -29.799, ln_age^2 4.884, ln_tc 13.540, ln_age*ln_tc -3.114, ln_hdl -13.578, ln_age*ln_hdl 3.149, ln_treated_sbp 2.019, ln_untreated_sbp 1.957, smoker 7.574, ln_age*smoker -1.665, diabetes 0.661, meanSum -29.18, S10 0.9665; AFRICAN AMERICAN WOMEN: ln_age 17.114, ln_tc 0.940, ln_hdl -18.920, ln_age*ln_hdl 4.475, ln_treated_sbp 29.291, ln_age*ln_treated_sbp -6.432, ln_untreated_sbp 27.820, ln_age*ln_untreated_sbp -6.087, smoker 0.691, diabetes 0.874, meanSum 86.61, S10 0.9533; WHITE MEN: ln_age 12.344, ln_tc 11.853, ln_age*ln_tc -2.664, ln_hdl -7.990, ln_age*ln_hdl 1.769, ln_treated_sbp 1.797, ln_untreated_sbp 1.764, smoker 7.837, ln_age*smoker -1.795, diabetes 0.658, meanSum 61.18, S10 0.9144; AFRICAN AMERICAN MEN: ln_age 2.469, ln_tc 0.302, ln_hdl -0.307, ln_treated_sbp 1.916, ln_untreated_sbp 1.809, smoker 0.549, diabetes 0.645, meanSum 19.54, S10 0.8954; round 1 decimal; not PREVENT 2024; not Framingham CHD; not SCORE2; not a statin order",
              "ten_year_ascvd_percent": 2.1,
              "total_cholesterol_mg_dl": 213
            },
            {
              "age": 55,
              "sex": "female",
              "cohort": "white",
              "smoker": false,
              "formula": "ascvd_pce",
              "citation": {
                "id": "goff-2013-pce",
                "doi": "10.1161/01.cir.0000437741.48606.98",
                "pmid": "24222018",
                "title": "2013 ACC/AHA Guideline on the Assessment of Cardiovascular Risk: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines",
                "source": "Circulation. 2014;129(25 Suppl 2):S49-S73",
                "authors": "Goff DC Jr, Lloyd-Jones DM, Bennett G, Coady S, D'Agostino RB, Gibbons R, Greenland P, Lackland DT, Levy D, O'Donnell CJ, Robinson JG, Schwartz JS, Shero ST, Smith SC Jr, Sorlie P, Stone NJ, Wilson PW"
              },
              "diabetes": false,
              "hdl_mg_dl": 50,
              "sbp_mm_hg": 120,
              "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.",
              "individual_sum": -29.6767,
              "antihypertensive": false,
              "formula_expression": "10-year hard ASCVD % = 100*(1-S10**exp(individualSum-meanSum)); Goff 2013 Table A; Ln=natural log; age 40-79; cohort white|african_american (caller-assigned paper terms; not param race; Recommendation 2 is not a silent swap); treated vs untreated SBP (not both); interactions only where Table A is not N/A; WHITE WOMEN: ln_age -29.799, ln_age^2 4.884, ln_tc 13.540, ln_age*ln_tc -3.114, ln_hdl -13.578, ln_age*ln_hdl 3.149, ln_treated_sbp 2.019, ln_untreated_sbp 1.957, smoker 7.574, ln_age*smoker -1.665, diabetes 0.661, meanSum -29.18, S10 0.9665; AFRICAN AMERICAN WOMEN: ln_age 17.114, ln_tc 0.940, ln_hdl -18.920, ln_age*ln_hdl 4.475, ln_treated_sbp 29.291, ln_age*ln_treated_sbp -6.432, ln_untreated_sbp 27.820, ln_age*ln_untreated_sbp -6.087, smoker 0.691, diabetes 0.874, meanSum 86.61, S10 0.9533; WHITE MEN: ln_age 12.344, ln_tc 11.853, ln_age*ln_tc -2.664, ln_hdl -7.990, ln_age*ln_hdl 1.769, ln_treated_sbp 1.797, ln_untreated_sbp 1.764, smoker 7.837, ln_age*smoker -1.795, diabetes 0.658, meanSum 61.18, S10 0.9144; AFRICAN AMERICAN MEN: ln_age 2.469, ln_tc 0.302, ln_hdl -0.307, ln_treated_sbp 1.916, ln_untreated_sbp 1.809, smoker 0.549, diabetes 0.645, meanSum 19.54, S10 0.8954; round 1 decimal; not PREVENT 2024; not Framingham CHD; not SCORE2; not a statin order",
              "ten_year_ascvd_percent": 2.1,
              "total_cholesterol_mg_dl": 213
            }
          ]
        }
      },
      "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": [
                      "age",
                      "sex",
                      "cohort",
                      "total_cholesterol_mg_dl",
                      "hdl_mg_dl",
                      "sbp_mm_hg",
                      "antihypertensive",
                      "smoker",
                      "diabetes"
                    ],
                    "properties": {
                      "age": {
                        "type": "integer",
                        "description": "Age in years (integer 40-79). Goff 2013 Table A 10-year hard ASCVD is for ages 40-79. magent does not take a date of birth."
                      },
                      "sex": {
                        "enum": [
                          "female",
                          "male"
                        ],
                        "type": "string",
                        "description": "Sex used by the sex-specific Table A coefficients (female or male). Not cohort."
                      },
                      "cohort": {
                        "enum": [
                          "white",
                          "african_american"
                        ],
                        "type": "string",
                        "description": "Caller-assigned cohort as used in Goff 2013 Table A: white or african_american (paper terms). Not param race. magent does not assign race or ethnicity. Recommendation 2 (use the White equations for other groups) is not applied as a silent swap; other strings are rejected."
                      },
                      "smoker": {
                        "type": "boolean",
                        "description": "Current cigarette smoking as assigned by the caller (true or false). Adds the Table A smoker term and ln(age) × smoker when that cell is not N/A. magent does not take a smoking history."
                      },
                      "diabetes": {
                        "type": "boolean",
                        "description": "Diabetes as assigned by the caller (true or false). Adds the Table A diabetes term. magent does not assay glucose."
                      },
                      "hdl_mg_dl": {
                        "type": "number",
                        "description": "HDL cholesterol in mg/dL (5-150). Enters as ln(HDL-C). magent does not assay lipids."
                      },
                      "sbp_mm_hg": {
                        "type": "number",
                        "description": "Systolic blood pressure in mm Hg (50-250). Enters as ln(SBP) with the treated or untreated Table A coefficient according to antihypertensive. magent does not measure blood pressure."
                      },
                      "antihypertensive": {
                        "type": "boolean",
                        "description": "Current antihypertensive treatment as assigned by the caller (true or false). true uses the Table A treated-SBP coefficient (and age × treated SBP when that cell is not N/A). false uses untreated SBP. Not both."
                      },
                      "total_cholesterol_mg_dl": {
                        "type": "number",
                        "description": "Total cholesterol in mg/dL (50-800). Enters as ln(total cholesterol). magent does not assay lipids."
                      }
                    }
                  },
                  "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
2026-09-03 06:37Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-11 23:46Z
x402 version
2
Max timeout
600s
Liveness probe
HTTP 0
Report

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. 6 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show 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/ascvd_pce, 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.