AI Inference · x402 · early usage

Japan retirement income tax: deduction by years of service, half-taxation with short-te…

Japan retirement income tax: deduction by years of service, half-taxation with short-term/officer exceptions, exact withholding rounding (1-yen floor), resident tax 6+4 percent split. $0.02/call.

by mart402.com · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls3

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Japan retirement income tax: deduction by years of service, half-taxation with short-term/officer exceptions, exact withholding rounding (1-yen floor), resident tax 6+4 percent split. $0.02/call.

Tags: bazaar · offer-receipt

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "payout_yen": 20000000,
  "years_of_service": 30
}

Output example

{
  "as_of": null,
  "assumptions": [],
  "billable": true,
  "breakdown": [],
  "carried_forward": [],
  "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。",
  "not_covered": [
    "106万円の壁の2026年以降の要件見直し",
    "乙欄・丙欄",
    "住宅ローン控除以外の税額控除",
    "分離課税(株式・不動産譲渡)",
    "合計所得2350万円超の基礎控除逓減",
    "固定残業代の有効性判断",
    "変形労働時間制",
    "年の中途の年末調整",
    "従たる給与",
    "扶養手当等の企業independent基準",
    "日額表",
    "管理監督者の判定",
    "自治体独自の超過課税(横浜市・名古屋市等)",
    "裁量労働制",
    "非居住者・年の中途入退社の年調"
  ],
  "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.",
  "ok": true,
  "result": {
    "deduction_yen": 15000000,
    "half_taxation": true,
    "income_tax_yen": 155702,
    "net_yen": 19594298,
    "resident_tax_yen": 250000,
    "taxable_yen": 2500000
  },
  "rules_version": "2026.08.18",
  "sample": true,
  "sample_input": {
    "payout_yen": 20000000,
    "years_of_service": 30
  },
  "sources": [
    "https://www.nta.go.jp/publication/pamph/gensen/zeigakuhyo2026/data/17-18.pdf",
    "https://www.nta.go.jp/taxes/shiraberu/taxanswer/shotoku/2260.htm",
    "https://www.tax.metro.tokyo.lg.jp/kazei/kojin_ju.html"
  ],
  "summary": "退職金20,000,000円(勤続30年) -> 手取り19,594,298円(退職所得控除15,000,000円・所得税155,702円・住民税250,000円)",
  "tool": "jp-retirement-tax",
  "unverified_rules": []
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/31258.json for the price and payment options.
Pay. Call GET https://mart402.com/v1/jp-retirement-tax. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.02 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 3 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.02	0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://mart402.com/v1/jp-retirement-tax"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://mart402.com/v1/jp-retirement-tax");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://mart402.com/v1/jp-retirement-tax")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: mart402.com
Endpoint: https://mart402.com/v1/jp-retirement-tax
Machine-readable: /resources/31258.json