Roundhouse

magent

AAP 2017 Flynn Table 3 pediatric BP category (normal, elevated, stage_1, stage_2) from age 1-17 and cuff mm Hg. Age ≥13 uses adult-aligned 120/80, 130/80, and 140/90 cutoffs. Age 1-12 needs caller 90th/95th mm Hg (magent does not interpolate height/sex tables). Category is the more severe limb. magent does not measure BP. Not a device, not a hypertension diagnosis, not the 2004 Fourth Report, and not ACC/AHA 2017 for age <13.

Otherofflineeip155:8453Exactvia cdp
https://api.magentlab.com/api/calc/aap_pediatric_bp
Aap-2017Pediatric-bpHemodynamicsHypertensionCalculator
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 22:29Z
—
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/aap_pediatric_bp",
        "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/aap_pediatric_bp",
    "tags": [
      "aap-2017",
      "pediatric-bp",
      "hemodynamics",
      "hypertension",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "AAP 2017 Flynn Table 3 pediatric BP category (normal, elevated, stage_1, stage_2) from age 1-17 and cuff mm Hg. Age ≥13 uses adult-aligned 120/80, 130/80, and 140/90 cutoffs. Age 1-12 needs caller 90th/95th mm Hg (magent does not interpolate height/sex tables). Category is the more severe limb. magent does not measure BP. Not a device, not a hypertension diagnosis, not the 2004 Fourth Report, and not ACC/AHA 2017 for age <13.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "age_years": 15,
            "dbp_p90_mm_hg": 66,
            "dbp_p95_mm_hg": 74,
            "sbp_p90_mm_hg": 108,
            "sbp_p95_mm_hg": 115,
            "systolic_mm_hg": 118,
            "diastolic_mm_hg": 72
          }
        },
        "output": {
          "type": "json",
          "example": {
            "formula": "aap_pediatric_bp",
            "category": "normal",
            "citation": {
              "id": "flynn-2017",
              "doi": "10.1542/peds.2017-1904",
              "pmid": "29192011",
              "title": "Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents",
              "source": "Pediatrics. 2017;140(3):e20171904",
              "authors": "Flynn JT, Kaelber DC, Baker-Smith CM, et al; Subcommittee on Screening and Management of High Blood Pressure in Children"
            },
            "age_years": 15,
            "components": [
              {
                "met": false,
                "value": 140,
                "factor": "systolic_stage_2"
              },
              {
                "met": false,
                "value": 90,
                "factor": "diastolic_stage_2"
              },
              {
                "met": false,
                "value": 130,
                "factor": "systolic_stage_1"
              },
              {
                "met": false,
                "value": 80,
                "factor": "diastolic_stage_1"
              },
              {
                "met": false,
                "value": 120,
                "factor": "systolic_elevated"
              },
              {
                "met": false,
                "value": 80,
                "factor": "diastolic_elevated"
              }
            ],
            "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.",
            "systolic_mm_hg": 118,
            "diastolic_mm_hg": 72,
            "formula_expression": "AAP 2017 Flynn Table 3 category is the more severe of the systolic and diastolic limbs (normal | elevated | stage_1 | stage_2). Age ≥13 (adult-aligned): normal if SBP <120 and DBP <80; elevated if SBP 120–129 and DBP <80; stage_1 if SBP 130–139 or DBP 80–89 and not stage_2; stage_2 if SBP ≥140 or DBP ≥90. Age 1–12 (caller-assigned AAP-table 90th and 95th mm Hg; magent does not interpolate Tables 4/5): stage_2 if SBP ≥ min(sbp_p95+12, 140) or DBP ≥ min(dbp_p95+12, 90); else stage_1 if SBP ≥ min(sbp_p95, 130) or DBP ≥ min(dbp_p95, 80); else elevated if SBP ≥ min(sbp_p90, 120) or DBP ≥ min(dbp_p90, 80); else normal. Percentile fields are required for age 1–12 and must be omitted for age ≥13. magent does not measure BP"
          }
        },
        "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_years",
                  "systolic_mm_hg",
                  "diastolic_mm_hg"
                ],
                "properties": {
                  "age_years": {
                    "type": "integer",
                    "description": "Completed age in years, integer 1-17 (Flynn 2017 Table 3). Age 1-12 uses the left-column percentile rule and requires caller 90th/95th mm Hg. Age 13-17 uses the right-column adult-aligned cutoffs and must omit percentile fields. Age 0 and age ≥18 are rejected."
                  },
                  "dbp_p90_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned AAP Table 4/5 diastolic 90th percentile in mm Hg for that child (40-180, and must be < dbp_p95_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                  },
                  "dbp_p95_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned AAP Table 4/5 diastolic 95th percentile in mm Hg for that child (40-180, and must be > dbp_p90_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                  },
                  "sbp_p90_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned AAP Table 4/5 systolic 90th percentile in mm Hg for that child (40-180, and must be < sbp_p95_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                  },
                  "sbp_p95_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned AAP Table 4/5 systolic 95th percentile in mm Hg for that child (40-180, and must be > sbp_p90_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                  },
                  "systolic_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned cuff systolic blood pressure in mm Hg (50-250). magent does not measure blood pressure."
                  },
                  "diastolic_mm_hg": {
                    "type": "number",
                    "description": "Caller-assigned cuff diastolic blood pressure in mm Hg (20-160). Must be less than systolic. magent does not measure blood pressure."
                  }
                }
              }
            },
            "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/aap_pediatric_bp",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "age_years": 15,
              "dbp_p90_mm_hg": 66,
              "dbp_p95_mm_hg": 74,
              "sbp_p90_mm_hg": 108,
              "sbp_p95_mm_hg": 115,
              "systolic_mm_hg": 118,
              "diastolic_mm_hg": 72
            },
            {
              "age_years": 15,
              "dbp_p90_mm_hg": 66,
              "dbp_p95_mm_hg": 74,
              "sbp_p90_mm_hg": 108,
              "sbp_p95_mm_hg": 115,
              "systolic_mm_hg": 118,
              "diastolic_mm_hg": 72
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/aap_pediatric_bp",
          "count": 2,
          "items": [
            {
              "formula": "aap_pediatric_bp",
              "category": "normal",
              "citation": {
                "id": "flynn-2017",
                "doi": "10.1542/peds.2017-1904",
                "pmid": "29192011",
                "title": "Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents",
                "source": "Pediatrics. 2017;140(3):e20171904",
                "authors": "Flynn JT, Kaelber DC, Baker-Smith CM, et al; Subcommittee on Screening and Management of High Blood Pressure in Children"
              },
              "age_years": 15,
              "components": [
                {
                  "met": false,
                  "value": 140,
                  "factor": "systolic_stage_2"
                },
                {
                  "met": false,
                  "value": 90,
                  "factor": "diastolic_stage_2"
                },
                {
                  "met": false,
                  "value": 130,
                  "factor": "systolic_stage_1"
                },
                {
                  "met": false,
                  "value": 80,
                  "factor": "diastolic_stage_1"
                },
                {
                  "met": false,
                  "value": 120,
                  "factor": "systolic_elevated"
                },
                {
                  "met": false,
                  "value": 80,
                  "factor": "diastolic_elevated"
                }
              ],
              "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.",
              "systolic_mm_hg": 118,
              "diastolic_mm_hg": 72,
              "formula_expression": "AAP 2017 Flynn Table 3 category is the more severe of the systolic and diastolic limbs (normal | elevated | stage_1 | stage_2). Age ≥13 (adult-aligned): normal if SBP <120 and DBP <80; elevated if SBP 120–129 and DBP <80; stage_1 if SBP 130–139 or DBP 80–89 and not stage_2; stage_2 if SBP ≥140 or DBP ≥90. Age 1–12 (caller-assigned AAP-table 90th and 95th mm Hg; magent does not interpolate Tables 4/5): stage_2 if SBP ≥ min(sbp_p95+12, 140) or DBP ≥ min(dbp_p95+12, 90); else stage_1 if SBP ≥ min(sbp_p95, 130) or DBP ≥ min(dbp_p95, 80); else elevated if SBP ≥ min(sbp_p90, 120) or DBP ≥ min(dbp_p90, 80); else normal. Percentile fields are required for age 1–12 and must be omitted for age ≥13. magent does not measure BP"
            },
            {
              "formula": "aap_pediatric_bp",
              "category": "normal",
              "citation": {
                "id": "flynn-2017",
                "doi": "10.1542/peds.2017-1904",
                "pmid": "29192011",
                "title": "Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents",
                "source": "Pediatrics. 2017;140(3):e20171904",
                "authors": "Flynn JT, Kaelber DC, Baker-Smith CM, et al; Subcommittee on Screening and Management of High Blood Pressure in Children"
              },
              "age_years": 15,
              "components": [
                {
                  "met": false,
                  "value": 140,
                  "factor": "systolic_stage_2"
                },
                {
                  "met": false,
                  "value": 90,
                  "factor": "diastolic_stage_2"
                },
                {
                  "met": false,
                  "value": 130,
                  "factor": "systolic_stage_1"
                },
                {
                  "met": false,
                  "value": 80,
                  "factor": "diastolic_stage_1"
                },
                {
                  "met": false,
                  "value": 120,
                  "factor": "systolic_elevated"
                },
                {
                  "met": false,
                  "value": 80,
                  "factor": "diastolic_elevated"
                }
              ],
              "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.",
              "systolic_mm_hg": 118,
              "diastolic_mm_hg": 72,
              "formula_expression": "AAP 2017 Flynn Table 3 category is the more severe of the systolic and diastolic limbs (normal | elevated | stage_1 | stage_2). Age ≥13 (adult-aligned): normal if SBP <120 and DBP <80; elevated if SBP 120–129 and DBP <80; stage_1 if SBP 130–139 or DBP 80–89 and not stage_2; stage_2 if SBP ≥140 or DBP ≥90. Age 1–12 (caller-assigned AAP-table 90th and 95th mm Hg; magent does not interpolate Tables 4/5): stage_2 if SBP ≥ min(sbp_p95+12, 140) or DBP ≥ min(dbp_p95+12, 90); else stage_1 if SBP ≥ min(sbp_p95, 130) or DBP ≥ min(dbp_p95, 80); else elevated if SBP ≥ min(sbp_p90, 120) or DBP ≥ min(dbp_p90, 80); else normal. Percentile fields are required for age 1–12 and must be omitted for age ≥13. magent does not measure BP"
            }
          ]
        }
      },
      "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_years",
                      "systolic_mm_hg",
                      "diastolic_mm_hg"
                    ],
                    "properties": {
                      "age_years": {
                        "type": "integer",
                        "description": "Completed age in years, integer 1-17 (Flynn 2017 Table 3). Age 1-12 uses the left-column percentile rule and requires caller 90th/95th mm Hg. Age 13-17 uses the right-column adult-aligned cutoffs and must omit percentile fields. Age 0 and age ≥18 are rejected."
                      },
                      "dbp_p90_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned AAP Table 4/5 diastolic 90th percentile in mm Hg for that child (40-180, and must be < dbp_p95_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                      },
                      "dbp_p95_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned AAP Table 4/5 diastolic 95th percentile in mm Hg for that child (40-180, and must be > dbp_p90_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                      },
                      "sbp_p90_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned AAP Table 4/5 systolic 90th percentile in mm Hg for that child (40-180, and must be < sbp_p95_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                      },
                      "sbp_p95_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned AAP Table 4/5 systolic 95th percentile in mm Hg for that child (40-180, and must be > sbp_p90_mm_hg). Required for age 1-12. Must be omitted for age ≥13. magent does not interpolate height or sex tables."
                      },
                      "systolic_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned cuff systolic blood pressure in mm Hg (50-250). magent does not measure blood pressure."
                      },
                      "diastolic_mm_hg": {
                        "type": "number",
                        "description": "Caller-assigned cuff diastolic blood pressure in mm Hg (20-160). Must be less than systolic. magent does not measure blood pressure."
                      }
                    }
                  },
                  "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 22:29Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-11 15:16Z
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. 7 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/aap_pediatric_bp, 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.