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Japan statutory calculations: net pay, social insurance, tax walls, holidays. Cited sources, x402.
Remote server: your requests and data go to mart402.com. Claude Code: claude mcp add --transport http jp-statutory https://mart402.com/mcp/jp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
get_catalog — Mart402 product catalog: all products, prices, payment config, error codes, rate limits. Free.get_receipt — Re-fetch a previously paid result for free by receipt id (every paid response carries receipt_id).get_sample — Free recorded sample response for a paid product (from real production runs, marked sample:true) - see the exact response shape before payinjp_company_profile — Japanese company site to a standard profile JSON (name, address, representative, capital, contact). $0.03/site. Choose this when you have thjp_payroll_net — Annual gross salary to net take-home (social insurance + income tax + resident tax). Exact NTA Beppyo-5 table. $0.02/call. Deterministic, cijp_bonus_net — Bonus net pay: social insurance and withholding tax (official rate table, based on previous month salary). $0.01/call. Deterministic, cites jp_social_insurance — Monthly social insurance premiums from the official Kyokai-Kenpo grade table (FY2026). $0.01/call. Deterministic, cites primary sources; errjp_dependent_threshold — Income-wall analysis: tax, social insurance (1.06M/1.30M), spousal and student-dependent walls. $0.02/call. Deterministic, cites primary soujp_consumption_tax — Consumption tax: per-rate invoice rounding, qualified-invoice validation, simplified taxation, 20% special. $0.01/call. Deterministic, citesjp_business_days — Japanese holidays, business-day arithmetic, statutory filing deadlines with holiday shift, wareki conversion. $0.003/call. Deterministic, cijp_overtime_wage — Overtime premium pay (Labor Standards Act Art.37, official rounding notice) and Article-36 limit check. $0.015/call. Deterministic, cites prjp_retirement_tax — Retirement income tax: deduction by years of service, half-taxation rules, exact withholding rounding. $0.02/call. Deterministic, cites primjp_mortgage — Mortgage schedules (level payment/principal), total interest, prepayment effect. $0.005/call. Deterministic, cites primary sources; errors ajp_payslip_audit — Audit a Japanese payslip: recompute statutory premiums and withholding tax from official tables and diff against the actual amounts, with pejp_crypto_tax — Japan crypto-asset tax: realized income under the NTA total-average or moving-average method (sell/spend/exchange as disposals, fees deductijp_payroll_suite — Japan payroll suite: net salary + social insurance + income walls (+bonus) in one call. Flat $0.05. Choose this when you want take-home pay,Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.