mart402.com

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": {
    "llms": "https://mart402.com/llms.txt",
    "agent_guide": "https://mart402.com/agents.md",
    "free_sandbox": "https://mart402.dev",
    "sample_output": "https://mart402.com/samples/jp-payslip-audit",
    "payment_examples": "https://github.com/tanaka-77/mart402-agent-kit"
  },
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://mart402.com/v1/jp-payslip-audit",
      "description": "Japan payslip audit: recompute statutory premiums and withholding tax from official tables and diff against the actual amounts. Per-item verdicts (match/explainable/mismatch) that explain grade revisions and combined care-premium notation instead of crying wolf. $0.02/call.",
      "outputSchema": {
        "input": {
          "body": {
            "age": 35,
            "payslip": {
              "dependents": 1,
              "health_yen": 14775,
              "pension_yen": 27450,
              "income_tax_yen": 4380,
              "monthly_gross_yen": 300000
            },
            "prefecture": "tokyo"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "description": "JSON: per-item audit verdicts (expected vs actual with diff and explanation), consistency flag, inferred grade on divergence"
        }
      },
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://mart402.com/v1/jp-payslip-audit",
    "mimeType": "application/json",
    "description": "Japan payslip audit: recompute statutory premiums and withholding tax from official tables and diff against the actual amounts. Per-item verdicts (match/explainable/mismatch) that explain grade revisions and combined care-premium notation instead of crying wolf. $0.02/call.",
    "serviceName": "Mart402"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "age": 35,
            "payslip": {
              "dependents": 1,
              "health_yen": 14775,
              "pension_yen": 27450,
              "income_tax_yen": 4380,
              "monthly_gross_yen": 300000
            },
            "prefecture": "tokyo"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "note": "SAMPLE RESPONSE generated by the exact deterministic engine that serves production (jp-statutory has no LLM: same input always produces this byte-identical result, carrying the same rules_version and cited primary sources). Served free at /samples/{product} so you can verify the response shape, the rules_version field and the source citations before paying. No payment was taken. The sample_input shown is the catalog example input that produced this output.",
            "tool": "jp-payslip-audit",
            "as_of": "2026-08-21",
            "result": {
              "items": [
                {
                  "item": "health",
                  "verdict": "match",
                  "diff_yen": 0,
                  "actual_yen": 14775,
                  "expected_yen": 14775
                },
                {
                  "item": "long_term_care",
                  "verdict": "not_provided",
                  "actual_yen": null,
                  "expected_yen": 0
                },
                {
                  "item": "pension",
                  "verdict": "match",
                  "diff_yen": 0,
                  "actual_yen": 27450,
                  "expected_yen": 27450
                },
                {
                  "item": "employment_insurance",
                  "verdict": "not_provided",
                  "actual_yen": null,
                  "expected_yen": 1500
                },
                {
                  "item": "income_tax_withheld",
                  "verdict": "explainable",
                  "diff_yen": -410,
                  "actual_yen": 4380,
                  "explanation": "紙の税額表(月額表)方式と電算特例方式の適法な差の範囲内",
                  "expected_yen": 4790
                }
              ],
              "counts": {
                "match": 2,
                "explainable": 1,
                "not_provided": 2
              },
              "smr_basis": "estimated_from_gross",
              "consistent": true,
              "summary_line": "監査3項目: 一致2・説明可能1・不一致0 -> 計算整合",
              "withholding_base_yen": 257775
            },
            "sample": true,
            "sources": [
              "engine-composition",
              "https://www.kyoukaikenpo.or.jp/assets/R8_13tokyo.pdf",
              "https://www.nta.go.jp/publication/pamph/gensen/zeigakuhyo2026/data/17-18.pdf"
            ],
            "summary": "監査3項目: 一致2・説明可能1・不一致0 -> 計算整合",
            "billable": true,
            "breakdown": [],
            "disclaimer": "仮定条件に基づく概算試算。税務相談・手続代行・法律相談ではない。申告・届出への使用不可。確定額は官公署または税理士・社会保険労務士等に確認のこと。",
            "assumptions": [
              "電算特例と紙の税額表の差は1000円まで適法差として扱う(実測ベースの目安)。非課税通勤手当の上限判定(月15万円等)は行わない"
            ],
            "not_covered": [
              "labor insurance の業種別特例(建設・農林以外)",
              "乙欄・丙欄",
              "住民税額の妥当性",
              "健康保険組合(協会けんぽ以外)",
              "厚生年金基金・企業年金",
              "国民健康保険・国民年金",
              "年の中途の年末調整",
              "従たる給与",
              "日額表",
              "産休育休免除・随時改定(月変)・定時決定の細目",
              "財形・組合費等の協定控除",
              "賞与明細(jp-bonus-netを使うこと)",
              "通勤手当の非課税限度額判定"
            ],
            "sample_input": {
              "age": 35,
              "payslip": {
                "dependents": 1,
                "health_yen": 14775,
                "pension_yen": 27450,
                "income_tax_yen": 4380,
                "monthly_gross_yen": 300000
              },
              "prefecture": "tokyo"
            },
            "rules_version": "2026.08.18",
            "carried_forward": [],
            "unverified_rules": []
          },
          "description": "JSON: per-item audit verdicts (expected vs actual with diff and explanation), consistency flag, inferred grade on divergence"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "properties": {
                  "age": {
                    "type": "number"
                  },
                  "payslip": {
                    "type": "object"
                  },
                  "prefecture": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    },
    "offer-receipt": {
      "info": {
        "offers": [
          {
            "format": "jws",
            "signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6bWFydDQwMi5jb20ja2V5LTEifQ.eyJhbW91bnQiOiIyMDAwMCIsImFzc2V0IjoiMHg4MzM1ODlmQ0Q2ZURiNkUwOGY0YzdDMzJENGY3MWI1NGJkQTAyOTEzIiwibmV0d29yayI6ImVpcDE1NTo4NDUzIiwicGF5VG8iOiIweEUzMjQ0YTIxRDBkNjhiRmE3OGI3Q0FkOEMzYjg3NzdhREZiQjMxODgiLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vbWFydDQwMi5jb20vdjEvanAtcGF5c2xpcC1hdWRpdCIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc5MDY2MjgzMywidmVyc2lvbiI6MX0.SKKhe5zRoXxdyddvQNW4gqG5K2rCLueQmRU3rsgJzY0CwzTiyYaEesopZSAqmSVjJ6ejgCgDJ3wtsUXpPZ0wBQ",
            "acceptIndex": 0
          }
        ]
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "offers"
        ],
        "properties": {
          "offers": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "format",
                "signature"
              ],
              "properties": {
                "format": {
                  "type": "string",
                  "const": "jws"
                },
                "signature": {
                  "type": "string",
                  "description": "JWS compact serialization containing the offer payload"
                },
                "acceptIndex": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  },
  "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.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://mart402.com/v1/jp-payslip-audit",
    "description": "",
    "maxAmountRequired": "20000",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog

2026-10-19 16:31Z

Last indexed by Roundhouse

2026-10-24 05:45Z

Last enriched (probe, favicon, geo)

2026-09-29 06:15Z

x402 version

1

Max timeout

120s

Liveness probe

HTTP 402