Roundhouse AI

magent

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

Inferenceofflineeip155:8453Exactvia cdp
https://api.magentlab.com/api/calc/impact
ImpactTbiPrognosisNeurologyCalculator
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 2026-09-03 03:21Z
—
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/impact",
        "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/impact",
    "tags": [
      "impact",
      "tbi",
      "prognosis",
      "neurology",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "Steyerberg 2008 IMPACT prognostic score for 6-month mortality and unfavorable outcome after traumatic brain injury. model=core (age, motor, pupils), extended (plus hypoxia, hypotension, Marshall CT, tSAH, EDH), or lab (plus glucose mmol/L and Hb g/dL). Points and printed logistic LPs from that paper. Not a diagnosis, not MRC CRASH (Perel 2008), and not magent chemotherapy CRASH.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "age": 35,
            "edh": false,
            "tsah": false,
            "model": "core",
            "hypoxia": false,
            "hypotension": false,
            "marshall_ct": "II",
            "motor_score": 3,
            "glucose_mmol_l": 10,
            "hemoglobin_g_dl": 11,
            "pupillary_reactivity": "both"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "age": 35,
            "model": "core",
            "score": 5,
            "formula": "impact",
            "citation": {
              "id": "steyerberg-2008-impact",
              "doi": "10.1371/journal.pmed.0050165",
              "pmid": "18640954",
              "title": "Predicting outcome after traumatic brain injury: development and international validation of prognostic scores based on admission characteristics",
              "source": "PLoS Med. 2008;5(8):e165",
              "authors": "Steyerberg EW, Mushkudiani N, Perel P, Butcher I, Lu J, McHugh GS, Murray GD, Marmarou A, Roberts I, Habbema JDF, Maas AIR"
            },
            "sum_core": 5,
            "max_score": 15,
            "components": [
              {
                "value": 35,
                "factor": "age",
                "points": 1,
                "present": true
              },
              {
                "value": 3,
                "factor": "motor_score",
                "points": 4,
                "present": true
              },
              {
                "value": "both",
                "factor": "pupillary_reactivity",
                "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.",
            "motor_score": 3,
            "formula_expression": "IMPACT (Steyerberg 2008 Fig 1): core = age(<=30:0, 31-39:1, 40-49:2, 50-59:3, 60-69:4, >=70:5) + motor(1-2:6, 3:4, 4:2, 5-6:0, 9:3) + pupils(both:0, one:2, none:4); extended = core + hypoxia(yes/suspected:1) + hypotension(yes/suspected:2) + marshall(I:-2, II:0, III-VI:2) + tSAH(yes:2) + EDH(yes:-2); lab = extended + glucose_mmol_l(<6:0, 6-8.9:1, 9-11.9:2, 12-14.9:3, >=15:4) + hb_g_dl(<9:3, 9-11.9:2, 12-14.9:1, >=15:0); p = 1/(1+e^(-LP)); LPcore mort=-2.55+0.275*sum; LPcore unfav=-1.62+0.299*sum; LPext mort=-2.98+0.256*sum; LPext unfav=-2.10+0.276*sum; LPlab mort=-3.42+0.216*sum; LPlab unfav=-2.82+0.257*sum; 6-month percent 1 decimal; not MRC CRASH",
            "pupillary_reactivity": "both",
            "mortality_6_month_percent": 23.6,
            "linear_predictor_mortality": -1.175,
            "unfavorable_6_month_percent": 46.9,
            "linear_predictor_unfavorable": -0.125
          }
        },
        "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": [
                  "model",
                  "age",
                  "motor_score",
                  "pupillary_reactivity"
                ],
                "properties": {
                  "age": {
                    "type": "integer",
                    "description": "Age in years (integer 14-90). Steyerberg 2008 Figure 1: ≤30 → 0; 31–39 → 1; 40–49 → 2; 50–59 → 3; 60–69 → 4; ≥70 → 5. Chart label 30–39 is the decade after ≤30 (age 30 scores 0)."
                  },
                  "edh": {
                    "type": "boolean",
                    "description": "Epidural hematoma (Steyerberg 2008). Required when model is extended or lab. true adds −2; false adds 0. Ignored on model=core."
                  },
                  "tsah": {
                    "type": "boolean",
                    "description": "Traumatic subarachnoid hemorrhage (Steyerberg 2008). Required when model is extended or lab. true adds 2; false adds 0. Ignored on model=core."
                  },
                  "model": {
                    "enum": [
                      "core",
                      "extended",
                      "lab"
                    ],
                    "type": "string",
                    "description": "Steyerberg 2008 IMPACT model. core uses age, motor, and pupils. extended adds hypoxia, hypotension, Marshall CT, tSAH, and EDH. lab adds glucose mmol/L and hemoglobin g/dL. Required; magent does not pick a model."
                  },
                  "hypoxia": {
                    "type": "boolean",
                    "description": "Hypoxia yes or suspected (Steyerberg 2008). Required when model is extended or lab. true adds 1; false adds 0. Ignored on model=core."
                  },
                  "hypotension": {
                    "type": "boolean",
                    "description": "Hypotension yes or suspected (Steyerberg 2008). Required when model is extended or lab. true adds 2; false adds 0. Ignored on model=core."
                  },
                  "marshall_ct": {
                    "enum": [
                      "I",
                      "II",
                      "III",
                      "IV",
                      "V",
                      "VI"
                    ],
                    "type": "string",
                    "description": "Marshall CT class I–VI (Steyerberg 2008). Required when model is extended or lab. I → −2; II → 0; III, IV, V, or VI → 2. Ignored on model=core. magent does not read the scan."
                  },
                  "motor_score": {
                    "type": "integer",
                    "description": "GCS motor integer 1-6 or 9 (untestable/missing) as in Steyerberg 2008. 1 or 2 (none/extension) → 6; 3 (abnormal flexion) → 4; 4 (normal flexion) → 2; 5 or 6 (localizes/obeys) → 0; 9 → 3."
                  },
                  "glucose_mmol_l": {
                    "type": "number",
                    "description": "Admission glucose in mmol/L (2.8-55.5). Required when model is lab. Steyerberg 2008: <6 → 0; 6–8.9 → 1; 9–11.9 → 2; 12–14.9 → 3; ≥15 → 4. Ignored on core and extended. magent does not assay glucose."
                  },
                  "hemoglobin_g_dl": {
                    "type": "number",
                    "description": "Admission hemoglobin in g/dL (3-22). Required when model is lab. Steyerberg 2008: <9 → 3; 9–11.9 → 2; 12–14.9 → 1; ≥15 → 0. Ignored on core and extended. magent does not assay hemoglobin."
                  },
                  "pupillary_reactivity": {
                    "enum": [
                      "both",
                      "one",
                      "none"
                    ],
                    "type": "string",
                    "description": "Pupillary reactivity (Steyerberg 2008). both → 0; one → 2; none → 4. Caller-assigned. magent does not examine pupils."
                  }
                }
              }
            },
            "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/impact",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "age": 35,
              "edh": false,
              "tsah": false,
              "model": "core",
              "hypoxia": false,
              "hypotension": false,
              "marshall_ct": "II",
              "motor_score": 3,
              "glucose_mmol_l": 10,
              "hemoglobin_g_dl": 11,
              "pupillary_reactivity": "both"
            },
            {
              "age": 35,
              "edh": false,
              "tsah": false,
              "model": "core",
              "hypoxia": false,
              "hypotension": false,
              "marshall_ct": "II",
              "motor_score": 3,
              "glucose_mmol_l": 10,
              "hemoglobin_g_dl": 11,
              "pupillary_reactivity": "both"
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/impact",
          "count": 2,
          "items": [
            {
              "age": 35,
              "model": "core",
              "score": 5,
              "formula": "impact",
              "citation": {
                "id": "steyerberg-2008-impact",
                "doi": "10.1371/journal.pmed.0050165",
                "pmid": "18640954",
                "title": "Predicting outcome after traumatic brain injury: development and international validation of prognostic scores based on admission characteristics",
                "source": "PLoS Med. 2008;5(8):e165",
                "authors": "Steyerberg EW, Mushkudiani N, Perel P, Butcher I, Lu J, McHugh GS, Murray GD, Marmarou A, Roberts I, Habbema JDF, Maas AIR"
              },
              "sum_core": 5,
              "max_score": 15,
              "components": [
                {
                  "value": 35,
                  "factor": "age",
                  "points": 1,
                  "present": true
                },
                {
                  "value": 3,
                  "factor": "motor_score",
                  "points": 4,
                  "present": true
                },
                {
                  "value": "both",
                  "factor": "pupillary_reactivity",
                  "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.",
              "motor_score": 3,
              "formula_expression": "IMPACT (Steyerberg 2008 Fig 1): core = age(<=30:0, 31-39:1, 40-49:2, 50-59:3, 60-69:4, >=70:5) + motor(1-2:6, 3:4, 4:2, 5-6:0, 9:3) + pupils(both:0, one:2, none:4); extended = core + hypoxia(yes/suspected:1) + hypotension(yes/suspected:2) + marshall(I:-2, II:0, III-VI:2) + tSAH(yes:2) + EDH(yes:-2); lab = extended + glucose_mmol_l(<6:0, 6-8.9:1, 9-11.9:2, 12-14.9:3, >=15:4) + hb_g_dl(<9:3, 9-11.9:2, 12-14.9:1, >=15:0); p = 1/(1+e^(-LP)); LPcore mort=-2.55+0.275*sum; LPcore unfav=-1.62+0.299*sum; LPext mort=-2.98+0.256*sum; LPext unfav=-2.10+0.276*sum; LPlab mort=-3.42+0.216*sum; LPlab unfav=-2.82+0.257*sum; 6-month percent 1 decimal; not MRC CRASH",
              "pupillary_reactivity": "both",
              "mortality_6_month_percent": 23.6,
              "linear_predictor_mortality": -1.175,
              "unfavorable_6_month_percent": 46.9,
              "linear_predictor_unfavorable": -0.125
            },
            {
              "age": 35,
              "model": "core",
              "score": 5,
              "formula": "impact",
              "citation": {
                "id": "steyerberg-2008-impact",
                "doi": "10.1371/journal.pmed.0050165",
                "pmid": "18640954",
                "title": "Predicting outcome after traumatic brain injury: development and international validation of prognostic scores based on admission characteristics",
                "source": "PLoS Med. 2008;5(8):e165",
                "authors": "Steyerberg EW, Mushkudiani N, Perel P, Butcher I, Lu J, McHugh GS, Murray GD, Marmarou A, Roberts I, Habbema JDF, Maas AIR"
              },
              "sum_core": 5,
              "max_score": 15,
              "components": [
                {
                  "value": 35,
                  "factor": "age",
                  "points": 1,
                  "present": true
                },
                {
                  "value": 3,
                  "factor": "motor_score",
                  "points": 4,
                  "present": true
                },
                {
                  "value": "both",
                  "factor": "pupillary_reactivity",
                  "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.",
              "motor_score": 3,
              "formula_expression": "IMPACT (Steyerberg 2008 Fig 1): core = age(<=30:0, 31-39:1, 40-49:2, 50-59:3, 60-69:4, >=70:5) + motor(1-2:6, 3:4, 4:2, 5-6:0, 9:3) + pupils(both:0, one:2, none:4); extended = core + hypoxia(yes/suspected:1) + hypotension(yes/suspected:2) + marshall(I:-2, II:0, III-VI:2) + tSAH(yes:2) + EDH(yes:-2); lab = extended + glucose_mmol_l(<6:0, 6-8.9:1, 9-11.9:2, 12-14.9:3, >=15:4) + hb_g_dl(<9:3, 9-11.9:2, 12-14.9:1, >=15:0); p = 1/(1+e^(-LP)); LPcore mort=-2.55+0.275*sum; LPcore unfav=-1.62+0.299*sum; LPext mort=-2.98+0.256*sum; LPext unfav=-2.10+0.276*sum; LPlab mort=-3.42+0.216*sum; LPlab unfav=-2.82+0.257*sum; 6-month percent 1 decimal; not MRC CRASH",
              "pupillary_reactivity": "both",
              "mortality_6_month_percent": 23.6,
              "linear_predictor_mortality": -1.175,
              "unfavorable_6_month_percent": 46.9,
              "linear_predictor_unfavorable": -0.125
            }
          ]
        }
      },
      "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": [
                      "model",
                      "age",
                      "motor_score",
                      "pupillary_reactivity"
                    ],
                    "properties": {
                      "age": {
                        "type": "integer",
                        "description": "Age in years (integer 14-90). Steyerberg 2008 Figure 1: ≤30 → 0; 31–39 → 1; 40–49 → 2; 50–59 → 3; 60–69 → 4; ≥70 → 5. Chart label 30–39 is the decade after ≤30 (age 30 scores 0)."
                      },
                      "edh": {
                        "type": "boolean",
                        "description": "Epidural hematoma (Steyerberg 2008). Required when model is extended or lab. true adds −2; false adds 0. Ignored on model=core."
                      },
                      "tsah": {
                        "type": "boolean",
                        "description": "Traumatic subarachnoid hemorrhage (Steyerberg 2008). Required when model is extended or lab. true adds 2; false adds 0. Ignored on model=core."
                      },
                      "model": {
                        "enum": [
                          "core",
                          "extended",
                          "lab"
                        ],
                        "type": "string",
                        "description": "Steyerberg 2008 IMPACT model. core uses age, motor, and pupils. extended adds hypoxia, hypotension, Marshall CT, tSAH, and EDH. lab adds glucose mmol/L and hemoglobin g/dL. Required; magent does not pick a model."
                      },
                      "hypoxia": {
                        "type": "boolean",
                        "description": "Hypoxia yes or suspected (Steyerberg 2008). Required when model is extended or lab. true adds 1; false adds 0. Ignored on model=core."
                      },
                      "hypotension": {
                        "type": "boolean",
                        "description": "Hypotension yes or suspected (Steyerberg 2008). Required when model is extended or lab. true adds 2; false adds 0. Ignored on model=core."
                      },
                      "marshall_ct": {
                        "enum": [
                          "I",
                          "II",
                          "III",
                          "IV",
                          "V",
                          "VI"
                        ],
                        "type": "string",
                        "description": "Marshall CT class I–VI (Steyerberg 2008). Required when model is extended or lab. I → −2; II → 0; III, IV, V, or VI → 2. Ignored on model=core. magent does not read the scan."
                      },
                      "motor_score": {
                        "type": "integer",
                        "description": "GCS motor integer 1-6 or 9 (untestable/missing) as in Steyerberg 2008. 1 or 2 (none/extension) → 6; 3 (abnormal flexion) → 4; 4 (normal flexion) → 2; 5 or 6 (localizes/obeys) → 0; 9 → 3."
                      },
                      "glucose_mmol_l": {
                        "type": "number",
                        "description": "Admission glucose in mmol/L (2.8-55.5). Required when model is lab. Steyerberg 2008: <6 → 0; 6–8.9 → 1; 9–11.9 → 2; 12–14.9 → 3; ≥15 → 4. Ignored on core and extended. magent does not assay glucose."
                      },
                      "hemoglobin_g_dl": {
                        "type": "number",
                        "description": "Admission hemoglobin in g/dL (3-22). Required when model is lab. Steyerberg 2008: <9 → 3; 9–11.9 → 2; 12–14.9 → 1; ≥15 → 0. Ignored on core and extended. magent does not assay hemoglobin."
                      },
                      "pupillary_reactivity": {
                        "enum": [
                          "both",
                          "one",
                          "none"
                        ],
                        "type": "string",
                        "description": "Pupillary reactivity (Steyerberg 2008). both → 0; one → 2; none → 4. Caller-assigned. magent does not examine pupils."
                      }
                    }
                  },
                  "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 03:21Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-11 19:46Z
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. 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/impact, 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.