Jp Statutory

com.mart402Published by mart402.comOfficial publisherv1.0.0Updated Oct 26, 2026

Japan statutory calculations: net pay, social insurance, tax walls, holidays. Cited sources, x402.

The publisher's own server: Extract

VerifiedStreamable HTTPWeb executableFinanceDeveloper ToolsBusiness & Commerce

Overview

AI-generated overview

Remote MCP server for Japanese statutory payroll and tax calculations — net pay, social insurance, tax walls, holidays and more — billed per call.

What you can do
  • Look up the product catalog, free sample responses and re-fetch paid results by receipt id
  • Compute Japanese payroll: annual net take-home, bonus net pay, monthly social insurance premiums, overtime premiums and Article-36 checks
  • Analyze income walls for dependents, spousal and student thresholds
  • Handle consumption tax: invoice rounding, qualified-invoice validation, simplified taxation
  • Work with dates and deadlines: holidays, business-day arithmetic, filing deadlines, wareki conversion
  • Audit payslips, compute retirement income tax, crypto-asset tax and mortgage schedules
When to use it
Useful when an assistant needs deterministic, source-cited Japanese payroll, tax or labor-law figures — take-home pay, social insurance, income walls, overtime, retirement or crypto tax — rather than estimates. Check the free catalog and samples first to see response shapes.
Requirements
A remote streamable HTTP endpoint; no local package, account, API key or environment variable is declared. Paid tools are billed per call, so a payment method compatible with the server's x402 billing is needed.
Before you install
Most tools cost money per call (roughly $0.003 to $0.05), and the payroll suite is a flat $0.05; free catalog, samples and receipt re-fetch are available to preview shapes. Calculations are statutory reference figures, not tax or legal advice. Errors and unverified rules are stated not to be billed.

Installation

In SourceWeft

  1. Open Jp Statutory in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.mart402%2Fjp-statutory/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "jp-statutory": {
      "type": "http",
      "url": "https://mart402.com/mcp/jp"
    }
  }
}

Tools

16

get_catalog

Mart402 catalog (products, prices, policies)

Mart402 product catalog: all products, prices, payment config, error codes, rate limits. Free.

Takes no parameters.

get_receipt

Re-fetch a paid result by receipt

Re-fetch a previously paid result for free by receipt id (every paid response carries receipt_id).

Parametersreceipt_idrequired

get_sample

Mart402 sample output

Free recorded sample response for a paid product (from real production runs, marked sample:true) - see the exact response shape before paying anything. Available: document-pipeline, enrich, extract, jp-bonus-net, jp-business-days, jp-company, jp-consumption-tax, jp-crypto-tax, jp-dependent-threshold, jp-mortgage, jp-overtime-wage, jp-payroll-net, jp-payroll-suite, jp-payslip-audit, jp-retirement-tax, jp-social-insurance, meal-vision, ocr, parse, pdf-info, pdf-merge, pdf-pages, portrait-analysis, report-pack, structured, style-profile, style-report, verify.

Parametersproductrequired

jp_company_profile

Jp Company Profile

Japanese company site to a standard profile JSON (name, address, representative, capital, contact). $0.03/site. Choose this when you have the URL of a Japanese company's OWN site and want its standard profile fields read from the page; for name/domain lookups use enrich_company (country_hint: jp).

Parametersurlrequiredx_payment

jp_payroll_net

Jp Payroll Net

Annual gross salary to net take-home (social insurance + income tax + resident tax). Exact NTA Beppyo-5 table. $0.02/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Choose this for a whole YEAR: annual gross salary to annual take-home after social insurance, income tax and resident tax. For one bonus use jp_bonus_net; for one month's premiums only use jp_social_insurance; to check an actual payslip use jp_payslip_audit.

Parametersageyearas_ofx_paymentdependentsprefecturerequiredannual_bonus_yenannual_gross_yenrequired

jp_bonus_net

Jp Bonus Net

Bonus net pay: social insurance and withholding tax (official rate table, based on previous month salary). $0.01/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Choose this for ONE bonus payment: its social insurance and withholding tax (the tax rate depends on the previous month's salary after social insurance). For annual totals use jp_payroll_net.

Parametersageas_ofbonus_yenrequiredx_paymentdependentsprefecturerequiredytd_bonus_yenprevious_month_after_si_yen

jp_social_insurance

Jp Social Insurance

Monthly social insurance premiums from the official Kyokai-Kenpo grade table (FY2026). $0.01/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Choose this when you only need the monthly social insurance premiums for a given monthly remuneration (official grade table); no tax is computed - for take-home pay use jp_payroll_net.

Parametersageas_ofx_paymentprefecturerequiredmonthly_remuneration_yenrequired

jp_dependent_threshold

Jp Dependent Threshold

Income-wall analysis: tax, social insurance (1.06M/1.30M), spousal and student-dependent walls. $0.02/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Choose this for 'how much can be earned before ...' questions: it locates the income walls (tax, social insurance, spousal, student dependent) for an annual income. It does not compute take-home pay (use jp_payroll_net).

Parametersyearas_ofx_paymentannual_income_yenrequired

jp_consumption_tax

Jp Consumption Tax

Consumption tax: per-rate invoice rounding, qualified-invoice validation, simplified taxation, 20% special. $0.01/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Required by mode (default invoice_totals): invoice_totals -> lines; validate_invoice -> document; simplified -> taxable_sales_excl_yen, category; two_percent -> taxable_sales_excl_yen, taxable_period_start, taxable_period_end.

Parametersmodeas_oflinescategorydocumentx_paymenttaxable_period_endtaxable_period_starttaxable_sales_excl_yen

jp_business_days

Jp Business Days

Japanese holidays, business-day arithmetic, statutory filing deadlines with holiday shift, wareki conversion. $0.003/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Required by mode (default add): add -> from, days; between -> from, to; holidays -> year; deadline -> kind, base_date; wareki -> date.

Parameterstodatedaysfromkindmodeyearbase_datex_paymentsaturday_off

jp_overtime_wage

Jp Overtime Wage

Overtime premium pay (Labor Standards Act Art.37, official rounding notice) and Article-36 limit check. $0.015/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Required by mode (default pay): pay -> monthly_salary_yen, monthly_scheduled_hours, hours; check36 -> monthly_overtime_hours.

Parametersmodehoursx_paymentmonthly_salary_yenmonthly_overtime_hoursmonthly_scheduled_hours

jp_retirement_tax

Jp Retirement Tax

Retirement income tax: deduction by years of service, half-taxation rules, exact withholding rounding. $0.02/call. Deterministic, cites primary sources; errors and unverified rules are never billed.

Parametersx_paymentdisabilityis_officerpayout_yenrequiredyears_of_servicerequired

jp_mortgage

Jp Mortgage

Mortgage schedules (level payment/principal), total interest, prepayment effect. $0.005/call. Deterministic, cites primary sources; errors and unverified rules are never billed.

Parametersmethodmonthsrequiredx_paymentprepaymentannual_raterequiredprincipal_yenrequired

jp_payslip_audit

Jp Payslip Audit

Audit a Japanese payslip: recompute statutory premiums and withholding tax from official tables and diff against the actual amounts, with per-item verdicts (match/explainable/mismatch). $0.02/call. Deterministic, cites primary sources; errors and unverified rules are never billed. Choose this when you HAVE an actual payslip and want each deduction checked against the official tables (match/explainable/mismatch); to compute expected amounts from a salary alone use jp_payroll_net or jp_social_insurance.

Parametersageas_ofpaysliprequiredx_paymentprefecturerequiredstandard_monthly_yen

jp_crypto_tax

Jp Crypto Tax

Japan crypto-asset tax: realized income under the NTA total-average or moving-average method (sell/spend/exchange as disposals, fees deductible), verified against the official NTA FAQ examples. $0.05/call. Deterministic, cites primary sources; errors and unverified rules are never billed.

Parametersyearas_ofmethodopeningx_paymenttransactionsrequiredother_taxable_income_yen

jp_payroll_suite

Jp 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, social insurance and the income walls (and the bonus, if given) together from one annual figure in one call; if you only need the take-home amount, jp_payroll_net is cheaper.

Parametersagex_paymentdependentsprefecturerequiredannual_bonus_yenannual_gross_yenrequiredprevious_month_after_si_yen

Version history

1
  1. v1.0.0LatestOct 20, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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