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Mart402 Japan Payslip Audit
x402
Mart402 Japan Payslip Audit is a paid API for AI agents from mart402.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).
Recomputes Japanese statutory social insurance premiums and withholding tax from official tables, diffs against actual payslip amounts, and returns per-item match/explainable/mismatch verdicts.
Price / call$0.02
Success—
StatusUnknown
How this service works
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.
Output
A structured response containing per-item verdicts (match, explainable, or mismatch) for each payslip deduction line — health insurance, care premium, pension, employment insurance, and withholding tax — along with diffs between recomputed statutory amounts and actual deducted amounts, explanations for grade revisions, and correct combined care-premium notation where applicable.
Example use cases
Monthly payroll accuracy check
“I just ran payroll for our Japan office and I want to audit this payslip for a 38-year-old employee in Osaka — here's the payslip data — can you recompute the statutory premiums and income tax and tell me which line items match, which are explainable, and which are genuine mismatches?”
Grade revision discrepancy investigation
“Our employee noticed their health insurance deduction changed last month but HR can't explain why. They're 52 years old in Kanagawa prefecture — here's the payslip — can you check if the new grade and care premium combination is correct according to the official tables?”
Compliance pre-submission audit
“Before we submit our payroll records to the accountant, can you run an audit on this payslip for a 29-year-old employee in Aichi? I want to make sure the pension, employment insurance, and withholding tax are all calculated correctly against the official statutory rates and flag anything that looks wrong.”
Technical details
Endpoint
POSThttps://mart402.com/v1/jp-payslip-audit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate a specific monthly payslip against Japan's official statutory insurance and tax tables and get per-item verdicts with explanations — especially for grade revisions or combined care-premium edge cases. Prefer this over the full payroll suite when the payslip already exists and you only need an audit diff, not a net-pay computation from scratch. It is more targeted than the Japan social insurance premiums endpoint alone because it covers withholding tax and produces actionable match/mismatch verdicts rather than just computed values.
Side effects
- Missing required payslip fields returns a validation error
- Invalid or unrecognized prefecture string causes a lookup failure
- Age outside valid working range may produce incorrect grade lookups
- Payslip with non-standard bonus or irregular pay may not be fully covered by audit logic
- Outdated rate tables if statutory tables have changed and service has not been updated
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| age | number | |
| payslip | object | |
| prefecture | string |
Tags
x402
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