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-consumption-tax",
    "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": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://mart402.com/v1/jp-consumption-tax",
      "description": "Japan consumption tax: per-rate invoice rounding (one rounding per rate), qualified invoice (T+13) field validation, simplified taxation, 20-percent special (taxable periods that include a day 2023-10-01..2026-09-30). $0.01/call.",
      "outputSchema": {
        "input": {
          "body": {
            "mode": "two_percent",
            "taxable_period_end": "2026-12-31",
            "taxable_period_start": "2026-01-01",
            "taxable_sales_excl_yen": 5000000
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "description": "JSON by mode: payable tax / per-rate invoice totals / qualified-invoice field check"
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://mart402.com/v1/jp-consumption-tax",
    "mimeType": "application/json",
    "description": "Japan consumption tax: per-rate invoice rounding (one rounding per rate), qualified invoice (T+13) field validation, simplified taxation, 20-percent special (taxable periods that include a day 2023-10-01..2026-09-30). $0.01/call.",
    "serviceName": "Mart402"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "mode": "two_percent",
            "taxable_period_end": "2026-12-31",
            "taxable_period_start": "2026-01-01",
            "taxable_sales_excl_yen": 5000000
          },
          "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-consumption-tax",
            "as_of": "2026-09-26",
            "result": {
              "caveat": "適用期間の終期が近い。年度判定を必ず行うこと",
              "period": "2023-10-01 から 2026-09-30 を含む課税期間",
              "days_left": null,
              "payable_yen": 100000,
              "effective_to": "2026-09-30",
              "output_tax_yen": 500000,
              "eligibility_basis": "taxable_period 2026-01-01..2026-12-31 overlaps 2023-10-01..2026-09-30"
            },
            "sample": true,
            "sources": [
              "https://www.nta.go.jp/taxes/shiraberu/taxanswer/shohi/6303.htm",
              "https://www.nta.go.jp/taxes/shiraberu/zeimokubetsu/shohi/keigenzeiritsu/invoice.htm"
            ],
            "summary": "2割特例: 納付税額100,000円(売上税額500,000円の20%)",
            "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": [],
            "not_covered": [
              "リバースチャージ",
              "課税売上割合・個別対応方式",
              "軽減税率の個別品目判定",
              "輸出免税"
            ],
            "sample_input": {
              "mode": "two_percent",
              "taxable_period_end": "2026-12-31",
              "taxable_period_start": "2026-01-01",
              "taxable_sales_excl_yen": 5000000
            },
            "rules_version": "2026.08.18",
            "carried_forward": [],
            "unverified_rules": []
          },
          "description": "JSON by mode: payable tax / per-rate invoice totals / qualified-invoice field check"
        }
      },
      "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": {
                  "mode": {
                    "type": "string"
                  },
                  "taxable_period_end": {
                    "type": "string"
                  },
                  "taxable_period_start": {
                    "type": "string"
                  },
                  "taxable_sales_excl_yen": {
                    "type": "number"
                  }
                }
              },
              "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.eyJhbW91bnQiOiIxMDAwMCIsImFzc2V0IjoiMHg4MzM1ODlmQ0Q2ZURiNkUwOGY0YzdDMzJENGY3MWI1NGJkQTAyOTEzIiwibmV0d29yayI6ImVpcDE1NTo4NDUzIiwicGF5VG8iOiIweEUzMjQ0YTIxRDBkNjhiRmE3OGI3Q0FkOEMzYjg3NzdhREZiQjMxODgiLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vbWFydDQwMi5jb20vdjEvanAtY29uc3VtcHRpb24tdGF4Iiwic2NoZW1lIjoiZXhhY3QiLCJ2YWxpZFVudGlsIjoxNzkwNzEzMjMwLCJ2ZXJzaW9uIjoxfQ.PBNHIoUH4drC3SiP9OofxoxdJl0ters-BLvcFv3omsDshuaXDrrRhGEX4FFxlXtojbPdNvXxk2nXFeMxABBVAw",
            "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-consumption-tax",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog

2026-10-11 20:31Z

Last indexed by Roundhouse

2026-10-15 18:15Z

Last enriched (probe, favicon, geo)

2026-09-29 20:15Z

x402 version

1

Max timeout

120s

Liveness probe

HTTP 402