magent

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

SearchLiveeip155:8453Exactvia cdp
MaggicHeart-failurePocockHemodynamicsCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 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 2026-08-31 18:08Z
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.

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        "paymentFlow": "upfront",
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  "resource": {
    "url": "https://api.magentlab.com/api/calc/maggic",
    "tags": [
      "maggic",
      "heart-failure",
      "pocock",
      "hemodynamics",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "Pocock 2013 MAGGIC integer score from 13 heart-failure predictors (age, EF, NYHA, creatinine, diabetes, not prescribed beta-blocker, SBP, BMI, HF duration >18 months, current smoker, COPD, male sex, not prescribed ACEI/ARB), including the published age×EF and SBP×EF extras. Returns integer score and Table 4 1-year and 3-year death probabilities for scores 0-50. Not a diagnosis, not a treatment order, not a reason to withhold therapy. magent does not examine the patient.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
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            "sex": "female",
            "copd": false,
            "acei_arb": true,
            "diabetes": false,
            "bmi_kg_m2": 30,
            "ef_percent": 55,
            "nyha_class": 1,
            "beta_blocker": true,
            "current_smoker": false,
            "systolic_mm_hg": 150,
            "creatinine_mg_dl": 0.9,
            "creatinine_umol_l": 80,
            "hf_duration_gt_18_months": false
          }
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              "doi": "10.1093/eurheartj/ehs337",
              "pmid": "23186806",
              "title": "Predicting survival in heart failure: a risk score based on 39 372 patients from 30 studies",
              "source": "Eur Heart J. 2013;34(19):1404-1413",
              "authors": "Pocock SJ, Ariti CA, McMurray JJV, Maggioni A, Køber L, Squire IB, Swedberg K, Dobson J, Poppe KK, Whalley GA, Doughty RN"
            },
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            "age_years": 50,
            "bmi_kg_m2": 30,
            "components": [
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              {
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                "factor": "creatinine",
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                "factor": "nyha_class",
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              {
                "factor": "diabetes",
                "points": 0,
                "present": false
              },
              {
                "factor": "not_prescribed_beta_blocker",
                "points": 0,
                "present": false
              },
              {
                "factor": "hf_duration_gt_18_months",
                "points": 0,
                "present": false
              },
              {
                "factor": "current_smoker",
                "points": 0,
                "present": false
              },
              {
                "factor": "copd",
                "points": 0,
                "present": false
              },
              {
                "factor": "male_sex",
                "points": 0,
                "present": false
              },
              {
                "factor": "not_prescribed_acei_arb",
                "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.",
            "ef_percent": 55,
            "nyha_class": 1,
            "beta_blocker": true,
            "current_smoker": false,
            "systolic_mm_hg": 150,
            "creatinine_umol_l": 80,
            "formula_expression": "MAGGIC integer score (Pocock 2013 Figure 2): EF <20 7, 20-24 6, 25-29 5, 30-34 3, 35-39 2, >=40 0; age extra by EF (<30 / 30-39 / >=40): <55 0/0/0, 55-59 1/2/3, 60-64 2/4/5, 65-69 4/6/7, 70-74 6/8/9, 75-79 8/10/12, >=80 10/13/15; SBP extra by EF: <110 5/3/2, 110-119 4/2/1, 120-129 3/1/1, 130-139 2/1/0, 140-149 1/0/0, >=150 0/0/0; BMI <15 6, 15-19 5, 20-24 3, 25-29 2, >=30 0; creatinine umol/L <90 0, 90-109 1, 110-129 2, 130-149 3, 150-169 4, 170-209 5, 210-249 6, >=250 8; NYHA I 0, II 2, III 6, IV 8; male 1; current smoker 1; diabetes 3; COPD 2; HF duration >18 months 2; not prescribed beta-blocker 3; not prescribed ACEI/ARB 1; Table 4 1-year and 3-year death probabilities for scores 0-50",
            "death_probability_1y": 0.015,
            "death_probability_3y": 0.039,
            "hf_duration_gt_18_months": false
          }
        },
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        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
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        ],
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          "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",
                  "ef_percent",
                  "nyha_class",
                  "diabetes",
                  "beta_blocker",
                  "systolic_mm_hg",
                  "bmi_kg_m2",
                  "hf_duration_gt_18_months",
                  "current_smoker",
                  "copd",
                  "sex",
                  "acei_arb"
                ],
                "properties": {
                  "age": {
                    "type": "integer",
                    "description": "Age in years (integer 18-120). Pocock 2013 integer extra depends on EF: <55 scores 0; then 55-59, 60-64, 65-69, 70-74, 75-79, >=80. magent does not examine the patient."
                  },
                  "sex": {
                    "enum": [
                      "female",
                      "male"
                    ],
                    "type": "string",
                    "description": "Sex (female or male). Male scores 1 (Figure 2)."
                  },
                  "copd": {
                    "type": "boolean",
                    "description": "COPD as assigned by the caller. true scores 2. magent does not diagnose COPD."
                  },
                  "acei_arb": {
                    "type": "boolean",
                    "description": "Prescribed an ACE inhibitor or ARB as assigned by the caller. true scores 0; false (not prescribed) scores 1. magent does not prescribe therapy."
                  },
                  "diabetes": {
                    "type": "boolean",
                    "description": "Diabetes as assigned by the caller. true scores 3 (Figure 2). magent does not diagnose diabetes."
                  },
                  "bmi_kg_m2": {
                    "type": "number",
                    "description": "Caller-supplied body-mass index in kg/m² (10-80). Figure 2: <15 6; 15-19 5; 20-24 3; 25-29 2; >=30 0. magent does not compute BMI from height and weight."
                  },
                  "ef_percent": {
                    "type": "number",
                    "description": "Left-ventricular ejection fraction in percent (1-90). Figure 2: <20 scores 7; 20-24 6; 25-29 5; 30-34 3; 35-39 2; >=40 0. Also selects the age and SBP extra rows. magent does not read an echocardiogram."
                  },
                  "nyha_class": {
                    "type": "integer",
                    "description": "NYHA class 1-4 as assigned by the caller (Figure 2: I 0, II 2, III 6, IV 8). magent does not assign NYHA class."
                  },
                  "beta_blocker": {
                    "type": "boolean",
                    "description": "Prescribed a beta-blocker as assigned by the caller. true scores 0; false (not prescribed) scores 3. magent does not prescribe therapy."
                  },
                  "current_smoker": {
                    "type": "boolean",
                    "description": "Current smoker as assigned by the caller. true scores 1. magent does not take a smoking history."
                  },
                  "systolic_mm_hg": {
                    "type": "number",
                    "description": "Systolic blood pressure in mm Hg (50-250). Figure 2 extra depends on EF: <110, 110-119, 120-129, 130-139, 140-149, >=150. magent does not measure blood pressure."
                  },
                  "creatinine_mg_dl": {
                    "type": "number",
                    "description": "Serum creatinine in mg/dL (0.1-20). Converted as µmol/L = mg/dL × 88.42, then Figure 2 µmol/L bins. Provide this or creatinine_umol_l, not both."
                  },
                  "creatinine_umol_l": {
                    "type": "number",
                    "description": "Serum creatinine in µmol/L (9-1768), the Figure 2 unit. Provide this or creatinine_mg_dl, not both. Bins: <90 0; 90-109 1; 110-129 2; 130-149 3; 150-169 4; 170-209 5; 210-249 6; >=250 8. magent does not assay creatinine."
                  },
                  "hf_duration_gt_18_months": {
                    "type": "boolean",
                    "description": "Heart-failure duration greater than 18 months as assigned by the caller (Table 2 HF duration >18 months). true scores 2. magent does not date the diagnosis."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
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            "properties": {
              "type": {
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              },
              "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.

USD Coin contract
0x8335…02913
Payment window
10 minutes
As published
5000 smallest units
The catalog’s raw entry
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    "extra": {
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      "paymentFlow": "upfront",
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    "amount": "5000",
    "scheme": "exact",
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Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "age": 50,
              "sex": "female",
              "copd": false,
              "acei_arb": true,
              "diabetes": false,
              "bmi_kg_m2": 30,
              "ef_percent": 55,
              "nyha_class": 1,
              "beta_blocker": true,
              "current_smoker": false,
              "systolic_mm_hg": 150,
              "creatinine_mg_dl": 0.9,
              "creatinine_umol_l": 80,
              "hf_duration_gt_18_months": false
            },
            {
              "age": 50,
              "sex": "female",
              "copd": false,
              "acei_arb": true,
              "diabetes": false,
              "bmi_kg_m2": 30,
              "ef_percent": 55,
              "nyha_class": 1,
              "beta_blocker": true,
              "current_smoker": false,
              "systolic_mm_hg": 150,
              "creatinine_mg_dl": 0.9,
              "creatinine_umol_l": 80,
              "hf_duration_gt_18_months": false
            }
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        "type": "http",
        "method": "POST"
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      "output": {
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        "example": {
          "path": "/api/calc/maggic",
          "count": 2,
          "items": [
            {
              "sex": "female",
              "copd": false,
              "score": 0,
              "formula": "maggic",
              "acei_arb": true,
              "citation": {
                "id": "pocock-2013",
                "doi": "10.1093/eurheartj/ehs337",
                "pmid": "23186806",
                "title": "Predicting survival in heart failure: a risk score based on 39 372 patients from 30 studies",
                "source": "Eur Heart J. 2013;34(19):1404-1413",
                "authors": "Pocock SJ, Ariti CA, McMurray JJV, Maggioni A, Køber L, Squire IB, Swedberg K, Dobson J, Poppe KK, Whalley GA, Doughty RN"
              },
              "diabetes": false,
              "age_years": 50,
              "bmi_kg_m2": 30,
              "components": [
                {
                  "value": 55,
                  "factor": "ef",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 50,
                  "factor": "age",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 150,
                  "factor": "systolic_mm_hg",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 30,
                  "factor": "bmi",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 80,
                  "factor": "creatinine",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 1,
                  "factor": "nyha_class",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "diabetes",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "not_prescribed_beta_blocker",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "hf_duration_gt_18_months",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "current_smoker",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "copd",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "male_sex",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "not_prescribed_acei_arb",
                  "points": 0,
                  "present": false
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              ],
              "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.",
              "ef_percent": 55,
              "nyha_class": 1,
              "beta_blocker": true,
              "current_smoker": false,
              "systolic_mm_hg": 150,
              "creatinine_umol_l": 80,
              "formula_expression": "MAGGIC integer score (Pocock 2013 Figure 2): EF <20 7, 20-24 6, 25-29 5, 30-34 3, 35-39 2, >=40 0; age extra by EF (<30 / 30-39 / >=40): <55 0/0/0, 55-59 1/2/3, 60-64 2/4/5, 65-69 4/6/7, 70-74 6/8/9, 75-79 8/10/12, >=80 10/13/15; SBP extra by EF: <110 5/3/2, 110-119 4/2/1, 120-129 3/1/1, 130-139 2/1/0, 140-149 1/0/0, >=150 0/0/0; BMI <15 6, 15-19 5, 20-24 3, 25-29 2, >=30 0; creatinine umol/L <90 0, 90-109 1, 110-129 2, 130-149 3, 150-169 4, 170-209 5, 210-249 6, >=250 8; NYHA I 0, II 2, III 6, IV 8; male 1; current smoker 1; diabetes 3; COPD 2; HF duration >18 months 2; not prescribed beta-blocker 3; not prescribed ACEI/ARB 1; Table 4 1-year and 3-year death probabilities for scores 0-50",
              "death_probability_1y": 0.015,
              "death_probability_3y": 0.039,
              "hf_duration_gt_18_months": false
            },
            {
              "sex": "female",
              "copd": false,
              "score": 0,
              "formula": "maggic",
              "acei_arb": true,
              "citation": {
                "id": "pocock-2013",
                "doi": "10.1093/eurheartj/ehs337",
                "pmid": "23186806",
                "title": "Predicting survival in heart failure: a risk score based on 39 372 patients from 30 studies",
                "source": "Eur Heart J. 2013;34(19):1404-1413",
                "authors": "Pocock SJ, Ariti CA, McMurray JJV, Maggioni A, Køber L, Squire IB, Swedberg K, Dobson J, Poppe KK, Whalley GA, Doughty RN"
              },
              "diabetes": false,
              "age_years": 50,
              "bmi_kg_m2": 30,
              "components": [
                {
                  "value": 55,
                  "factor": "ef",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 50,
                  "factor": "age",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 150,
                  "factor": "systolic_mm_hg",
                  "points": 0,
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                {
                  "value": 80,
                  "factor": "creatinine",
                  "points": 0,
                  "present": false
                },
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                  "value": 1,
                  "factor": "nyha_class",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "diabetes",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "not_prescribed_beta_blocker",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "hf_duration_gt_18_months",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "current_smoker",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "copd",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "male_sex",
                  "points": 0,
                  "present": false
                },
                {
                  "factor": "not_prescribed_acei_arb",
                  "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.",
              "ef_percent": 55,
              "nyha_class": 1,
              "beta_blocker": true,
              "current_smoker": false,
              "systolic_mm_hg": 150,
              "creatinine_umol_l": 80,
              "formula_expression": "MAGGIC integer score (Pocock 2013 Figure 2): EF <20 7, 20-24 6, 25-29 5, 30-34 3, 35-39 2, >=40 0; age extra by EF (<30 / 30-39 / >=40): <55 0/0/0, 55-59 1/2/3, 60-64 2/4/5, 65-69 4/6/7, 70-74 6/8/9, 75-79 8/10/12, >=80 10/13/15; SBP extra by EF: <110 5/3/2, 110-119 4/2/1, 120-129 3/1/1, 130-139 2/1/0, 140-149 1/0/0, >=150 0/0/0; BMI <15 6, 15-19 5, 20-24 3, 25-29 2, >=30 0; creatinine umol/L <90 0, 90-109 1, 110-129 2, 130-149 3, 150-169 4, 170-209 5, 210-249 6, >=250 8; NYHA I 0, II 2, III 6, IV 8; male 1; current smoker 1; diabetes 3; COPD 2; HF duration >18 months 2; not prescribed beta-blocker 3; not prescribed ACEI/ARB 1; Table 4 1-year and 3-year death probabilities for scores 0-50",
              "death_probability_1y": 0.015,
              "death_probability_3y": 0.039,
              "hf_duration_gt_18_months": false
            }
          ]
        }
      },
      "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",
                      "ef_percent",
                      "nyha_class",
                      "diabetes",
                      "beta_blocker",
                      "systolic_mm_hg",
                      "bmi_kg_m2",
                      "hf_duration_gt_18_months",
                      "current_smoker",
                      "copd",
                      "sex",
                      "acei_arb"
                    ],
                    "properties": {
                      "age": {
                        "type": "integer",
                        "description": "Age in years (integer 18-120). Pocock 2013 integer extra depends on EF: <55 scores 0; then 55-59, 60-64, 65-69, 70-74, 75-79, >=80. magent does not examine the patient."
                      },
                      "sex": {
                        "enum": [
                          "female",
                          "male"
                        ],
                        "type": "string",
                        "description": "Sex (female or male). Male scores 1 (Figure 2)."
                      },
                      "copd": {
                        "type": "boolean",
                        "description": "COPD as assigned by the caller. true scores 2. magent does not diagnose COPD."
                      },
                      "acei_arb": {
                        "type": "boolean",
                        "description": "Prescribed an ACE inhibitor or ARB as assigned by the caller. true scores 0; false (not prescribed) scores 1. magent does not prescribe therapy."
                      },
                      "diabetes": {
                        "type": "boolean",
                        "description": "Diabetes as assigned by the caller. true scores 3 (Figure 2). magent does not diagnose diabetes."
                      },
                      "bmi_kg_m2": {
                        "type": "number",
                        "description": "Caller-supplied body-mass index in kg/m² (10-80). Figure 2: <15 6; 15-19 5; 20-24 3; 25-29 2; >=30 0. magent does not compute BMI from height and weight."
                      },
                      "ef_percent": {
                        "type": "number",
                        "description": "Left-ventricular ejection fraction in percent (1-90). Figure 2: <20 scores 7; 20-24 6; 25-29 5; 30-34 3; 35-39 2; >=40 0. Also selects the age and SBP extra rows. magent does not read an echocardiogram."
                      },
                      "nyha_class": {
                        "type": "integer",
                        "description": "NYHA class 1-4 as assigned by the caller (Figure 2: I 0, II 2, III 6, IV 8). magent does not assign NYHA class."
                      },
                      "beta_blocker": {
                        "type": "boolean",
                        "description": "Prescribed a beta-blocker as assigned by the caller. true scores 0; false (not prescribed) scores 3. magent does not prescribe therapy."
                      },
                      "current_smoker": {
                        "type": "boolean",
                        "description": "Current smoker as assigned by the caller. true scores 1. magent does not take a smoking history."
                      },
                      "systolic_mm_hg": {
                        "type": "number",
                        "description": "Systolic blood pressure in mm Hg (50-250). Figure 2 extra depends on EF: <110, 110-119, 120-129, 130-139, 140-149, >=150. magent does not measure blood pressure."
                      },
                      "creatinine_mg_dl": {
                        "type": "number",
                        "description": "Serum creatinine in mg/dL (0.1-20). Converted as µmol/L = mg/dL × 88.42, then Figure 2 µmol/L bins. Provide this or creatinine_umol_l, not both."
                      },
                      "creatinine_umol_l": {
                        "type": "number",
                        "description": "Serum creatinine in µmol/L (9-1768), the Figure 2 unit. Provide this or creatinine_mg_dl, not both. Bins: <90 0; 90-109 1; 110-129 2; 130-149 3; 150-169 4; 170-209 5; 210-249 6; >=250 8. magent does not assay creatinine."
                      },
                      "hf_duration_gt_18_months": {
                        "type": "boolean",
                        "description": "Heart-failure duration greater than 18 months as assigned by the caller (Table 2 HF duration >18 months). true scores 2. magent does not date the diagnosis."
                      }
                    }
                  },
                  "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
2026-08-31 18:08Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-23 14:45Z
x402 version
2
Max timeout
600s
Liveness probe
HTTP 402
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. 9 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/maggic, 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.