magent

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": [
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      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "paymentFlow": "upfront",
        "resourceUrl": "https://api.magentlab.com/api/calc/prevail",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 600
    },
    {
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      "extra": {
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        "receiverAuthorizer": "0x3721824a31197dcDD2984cF43b92B6cc8A87c0Fb",
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      "amount": "5000",
      "scheme": "batch-settlement",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 600
    }
  ],
  "resource": {
    "url": "https://api.magentlab.com/api/calc/prevail",
    "tags": [
      "prevail",
      "mcrpc",
      "prostate-cancer",
      "survival",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "Armstrong 2018 PREVAIL Cox linear predictor for overall survival in chemotherapy-naïve metastatic castration-resistant prostate cancer from albumin, ALP versus ULN, bone metastases under 10, hemoglobin, LDH versus ULN, NLR under 2.5, pain 0-1, liver metastases, ln(PSA), months from diagnosis, and enzalutamide versus placebo. Table 1 HRs as ln(HR). Not a 1-/2-/3-year OS percent (no published S0). magent does not read bone scans. Not a dose or treatment order.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
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            "nlr_lt_2_5": true,
            "pain_0_to_1": true,
            "albumin_g_dl": 4,
            "alp_below_uln": true,
            "ldh_below_uln": true,
            "bone_mets_lt_10": true,
            "hemoglobin_g_dl": 13,
            "no_liver_metastases": true,
            "months_since_diagnosis": 60,
            "treatment_enzalutamide": true
          }
        },
        "output": {
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          "example": {
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            "citation": {
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              "doi": "10.1093/annonc/mdy406",
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              "title": "Development and validation of a prognostic model for overall survival in chemotherapy-naïve men with metastatic castration-resistant prostate cancer",
              "source": "Ann Oncol. 2018;29(11):2200-2209",
              "authors": "Armstrong AJ, Lin P, Higano CS, et al."
            },
            "psa_ng_ml": 20,
            "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.",
            "nlr_lt_2_5": true,
            "risk_score": -5.796122,
            "pain_0_to_1": true,
            "albumin_g_dl": 4,
            "alp_below_uln": true,
            "ldh_below_uln": true,
            "bone_mets_lt_10": true,
            "hemoglobin_g_dl": 13,
            "linear_predictor": -5.796122,
            "formula_expression": "lp = ln(0.71)*albumin_g_dl + ln(0.79)*alp_below_uln + ln(0.68)*bone_mets_lt_10 + ln(0.85)*hemoglobin_g_dl + ln(0.67)*ldh_below_uln + ln(0.69)*nlr_lt_2_5 + ln(0.77)*pain_0_to_1 + ln(0.49)*no_liver_metastases + ln(1.23)*ln(psa_ng_ml) + ln(0.997)*months_since_diagnosis + ln(0.68)*treatment_enzalutamide; Armstrong 2018 Table 1 multivariable HRs, β = ln(HR); A versus B codes A as 1; booleans contribute β when true else 0; no printed S0; not 1-/2-/3-year OS percents; not nomogram points; training-set tertiles unpublished as numeric cutoffs; chemotherapy-naïve mCRPC PREVAIL; magent does not read bone scans",
            "no_liver_metastases": true,
            "months_since_diagnosis": 60,
            "treatment_enzalutamide": true
          }
        },
        "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": [
                  "albumin_g_dl",
                  "alp_below_uln",
                  "bone_mets_lt_10",
                  "hemoglobin_g_dl",
                  "ldh_below_uln",
                  "nlr_lt_2_5",
                  "pain_0_to_1",
                  "no_liver_metastases",
                  "psa_ng_ml",
                  "months_since_diagnosis",
                  "treatment_enzalutamide"
                ],
                "properties": {
                  "psa_ng_ml": {
                    "type": "number",
                    "description": "Baseline PSA in ng/mL (0.1-10000). Table 1: continuous log_e PSA, HR 1.23 per ln(ng/mL). magent does not assay PSA."
                  },
                  "nlr_lt_2_5": {
                    "type": "boolean",
                    "description": "Neutrophil-to-lymphocyte ratio <2.5 as assigned by the caller (true or false). Table 1: true (<2.5 versus ≥2.5) has HR 0.69. magent does not compute NLR from counts."
                  },
                  "pain_0_to_1": {
                    "type": "boolean",
                    "description": "Pain score 0-1 versus ≥2 on the paper's linear scale, as assigned by the caller (true or false). Table 1: true (0-1 versus ≥2) has HR 0.77. magent does not assign pain scores."
                  },
                  "albumin_g_dl": {
                    "type": "number",
                    "description": "Serum albumin in g/dL (1.0-6.5). Armstrong 2018 Table 1: continuous, HR 0.71 per g/dL. magent does not assay albumin."
                  },
                  "alp_below_uln": {
                    "type": "boolean",
                    "description": "Alkaline phosphatase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus ≥ULN) has HR 0.79. magent does not assay ALP or apply ULN."
                  },
                  "ldh_below_uln": {
                    "type": "boolean",
                    "description": "Lactate dehydrogenase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus ≥1×ULN) has HR 0.67. magent does not assay LDH or apply ULN."
                  },
                  "bone_mets_lt_10": {
                    "type": "boolean",
                    "description": "Fewer than 10 bone metastases as assigned by the caller (true or false). Table 1: true (<10 versus ≥10) has HR 0.68. magent does not read bone scans."
                  },
                  "hemoglobin_g_dl": {
                    "type": "number",
                    "description": "Hemoglobin in g/dL (3.0-22.0). Table 1: continuous, HR 0.85 per g/dL. magent does not assay hemoglobin."
                  },
                  "no_liver_metastases": {
                    "type": "boolean",
                    "description": "No liver metastases as assigned by the caller (true or false). Table 1 pattern of spread: true (no liver metastases versus any liver metastases) has HR 0.49. magent does not read imaging."
                  },
                  "months_since_diagnosis": {
                    "type": "number",
                    "description": "Time from diagnosis to randomization in months (0-720). Table 1: continuous, HR 0.997 per month. magent does not date the interval."
                  },
                  "treatment_enzalutamide": {
                    "type": "boolean",
                    "description": "true if the PREVAIL treatment term is enzalutamide, false if placebo. Table 1: true (enzalutamide versus placebo) has HR 0.68. Not a dose or treatment order."
                  }
                }
              }
            },
            "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.

[
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    "extra": {
      "name": "USD Coin",
      "version": "2",
      "paymentFlow": "upfront",
      "resourceUrl": "https://api.magentlab.com/api/calc/prevail",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "psa_ng_ml": 20,
              "nlr_lt_2_5": true,
              "pain_0_to_1": true,
              "albumin_g_dl": 4,
              "alp_below_uln": true,
              "ldh_below_uln": true,
              "bone_mets_lt_10": true,
              "hemoglobin_g_dl": 13,
              "no_liver_metastases": true,
              "months_since_diagnosis": 60,
              "treatment_enzalutamide": true
            },
            {
              "psa_ng_ml": 20,
              "nlr_lt_2_5": true,
              "pain_0_to_1": true,
              "albumin_g_dl": 4,
              "alp_below_uln": true,
              "ldh_below_uln": true,
              "bone_mets_lt_10": true,
              "hemoglobin_g_dl": 13,
              "no_liver_metastases": true,
              "months_since_diagnosis": 60,
              "treatment_enzalutamide": true
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/prevail",
          "count": 2,
          "items": [
            {
              "formula": "prevail",
              "citation": {
                "id": "armstrong-2018-prevail",
                "doi": "10.1093/annonc/mdy406",
                "pmid": "30202945",
                "title": "Development and validation of a prognostic model for overall survival in chemotherapy-naïve men with metastatic castration-resistant prostate cancer",
                "source": "Ann Oncol. 2018;29(11):2200-2209",
                "authors": "Armstrong AJ, Lin P, Higano CS, et al."
              },
              "psa_ng_ml": 20,
              "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.",
              "nlr_lt_2_5": true,
              "risk_score": -5.796122,
              "pain_0_to_1": true,
              "albumin_g_dl": 4,
              "alp_below_uln": true,
              "ldh_below_uln": true,
              "bone_mets_lt_10": true,
              "hemoglobin_g_dl": 13,
              "linear_predictor": -5.796122,
              "formula_expression": "lp = ln(0.71)*albumin_g_dl + ln(0.79)*alp_below_uln + ln(0.68)*bone_mets_lt_10 + ln(0.85)*hemoglobin_g_dl + ln(0.67)*ldh_below_uln + ln(0.69)*nlr_lt_2_5 + ln(0.77)*pain_0_to_1 + ln(0.49)*no_liver_metastases + ln(1.23)*ln(psa_ng_ml) + ln(0.997)*months_since_diagnosis + ln(0.68)*treatment_enzalutamide; Armstrong 2018 Table 1 multivariable HRs, β = ln(HR); A versus B codes A as 1; booleans contribute β when true else 0; no printed S0; not 1-/2-/3-year OS percents; not nomogram points; training-set tertiles unpublished as numeric cutoffs; chemotherapy-naïve mCRPC PREVAIL; magent does not read bone scans",
              "no_liver_metastases": true,
              "months_since_diagnosis": 60,
              "treatment_enzalutamide": true
            },
            {
              "formula": "prevail",
              "citation": {
                "id": "armstrong-2018-prevail",
                "doi": "10.1093/annonc/mdy406",
                "pmid": "30202945",
                "title": "Development and validation of a prognostic model for overall survival in chemotherapy-naïve men with metastatic castration-resistant prostate cancer",
                "source": "Ann Oncol. 2018;29(11):2200-2209",
                "authors": "Armstrong AJ, Lin P, Higano CS, et al."
              },
              "psa_ng_ml": 20,
              "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.",
              "nlr_lt_2_5": true,
              "risk_score": -5.796122,
              "pain_0_to_1": true,
              "albumin_g_dl": 4,
              "alp_below_uln": true,
              "ldh_below_uln": true,
              "bone_mets_lt_10": true,
              "hemoglobin_g_dl": 13,
              "linear_predictor": -5.796122,
              "formula_expression": "lp = ln(0.71)*albumin_g_dl + ln(0.79)*alp_below_uln + ln(0.68)*bone_mets_lt_10 + ln(0.85)*hemoglobin_g_dl + ln(0.67)*ldh_below_uln + ln(0.69)*nlr_lt_2_5 + ln(0.77)*pain_0_to_1 + ln(0.49)*no_liver_metastases + ln(1.23)*ln(psa_ng_ml) + ln(0.997)*months_since_diagnosis + ln(0.68)*treatment_enzalutamide; Armstrong 2018 Table 1 multivariable HRs, β = ln(HR); A versus B codes A as 1; booleans contribute β when true else 0; no printed S0; not 1-/2-/3-year OS percents; not nomogram points; training-set tertiles unpublished as numeric cutoffs; chemotherapy-naïve mCRPC PREVAIL; magent does not read bone scans",
              "no_liver_metastases": true,
              "months_since_diagnosis": 60,
              "treatment_enzalutamide": true
            }
          ]
        }
      },
      "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": [
                      "albumin_g_dl",
                      "alp_below_uln",
                      "bone_mets_lt_10",
                      "hemoglobin_g_dl",
                      "ldh_below_uln",
                      "nlr_lt_2_5",
                      "pain_0_to_1",
                      "no_liver_metastases",
                      "psa_ng_ml",
                      "months_since_diagnosis",
                      "treatment_enzalutamide"
                    ],
                    "properties": {
                      "psa_ng_ml": {
                        "type": "number",
                        "description": "Baseline PSA in ng/mL (0.1-10000). Table 1: continuous log_e PSA, HR 1.23 per ln(ng/mL). magent does not assay PSA."
                      },
                      "nlr_lt_2_5": {
                        "type": "boolean",
                        "description": "Neutrophil-to-lymphocyte ratio <2.5 as assigned by the caller (true or false). Table 1: true (<2.5 versus ≥2.5) has HR 0.69. magent does not compute NLR from counts."
                      },
                      "pain_0_to_1": {
                        "type": "boolean",
                        "description": "Pain score 0-1 versus ≥2 on the paper's linear scale, as assigned by the caller (true or false). Table 1: true (0-1 versus ≥2) has HR 0.77. magent does not assign pain scores."
                      },
                      "albumin_g_dl": {
                        "type": "number",
                        "description": "Serum albumin in g/dL (1.0-6.5). Armstrong 2018 Table 1: continuous, HR 0.71 per g/dL. magent does not assay albumin."
                      },
                      "alp_below_uln": {
                        "type": "boolean",
                        "description": "Alkaline phosphatase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus ≥ULN) has HR 0.79. magent does not assay ALP or apply ULN."
                      },
                      "ldh_below_uln": {
                        "type": "boolean",
                        "description": "Lactate dehydrogenase below the institutional ULN as assigned by the caller (true or false). Table 1: true (<ULN versus ≥1×ULN) has HR 0.67. magent does not assay LDH or apply ULN."
                      },
                      "bone_mets_lt_10": {
                        "type": "boolean",
                        "description": "Fewer than 10 bone metastases as assigned by the caller (true or false). Table 1: true (<10 versus ≥10) has HR 0.68. magent does not read bone scans."
                      },
                      "hemoglobin_g_dl": {
                        "type": "number",
                        "description": "Hemoglobin in g/dL (3.0-22.0). Table 1: continuous, HR 0.85 per g/dL. magent does not assay hemoglobin."
                      },
                      "no_liver_metastases": {
                        "type": "boolean",
                        "description": "No liver metastases as assigned by the caller (true or false). Table 1 pattern of spread: true (no liver metastases versus any liver metastases) has HR 0.49. magent does not read imaging."
                      },
                      "months_since_diagnosis": {
                        "type": "number",
                        "description": "Time from diagnosis to randomization in months (0-720). Table 1: continuous, HR 0.997 per month. magent does not date the interval."
                      },
                      "treatment_enzalutamide": {
                        "type": "boolean",
                        "description": "true if the PREVAIL treatment term is enzalutamide, false if placebo. Table 1: true (enzalutamide versus placebo) has HR 0.68. Not a dose or treatment order."
                      }
                    }
                  },
                  "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

2026-09-04 07:02Z

Last indexed by Roundhouse

2026-09-07 06:20Z

Last enriched (probe, favicon, geo)

2026-09-12 13:45Z

x402 version

2

Max timeout

600s

Liveness probe

HTTP 0