日本の給与・社会保険・労働法

Name: 日本の給与・社会保険・労働法
Author: kishida-devil

MCP serverMCP

Japan payroll & social insurance. 日本の給与計算・社会保険。47都道府県の料率、源泉所得税、割増賃金、有給、標準報酬月額の改定、最低賃金。根拠の条文つき。

by kishida-devilrepository ↗homepage ↗v0.4.5MIT

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30-day availability113/113 checks ok

Tools observed via MCP handshake

calculate_payslip — Full monthly deduction breakdown for one employee: health insurance, long-term care, pension, child support, employment insurance, withholding income tax and ne
list_workers_compensation_rates — Workers compensation (労災保険) rates by business type, and the employer premium on a given 賃金総額. The whole premium falls on the employer — nothing is deducted fro
calculate_bonus — Premiums and income tax on a 賞与. Both work differently from monthly pay and are routinely got wrong. Premiums are charged on 標準賞与額 (the bonus truncated to the
calculate_withholding_tax — Income tax to withhold from a payment, from the National Tax Agency tables. The taxable amount is pay AFTER social insurance has been deducted, not gross. Pick
judge_monthly_revision — Decides whether a pay change forces the standard remuneration to be revised, and answers SEPARATELY for health insurance and pension — the tables differ, so a c
decide_regular_remuneration — The yearly redetermination of standard remuneration, effective each September through the following August. Months below the payment-basis-day threshold drop O
judge_leave_end_revision — A separate route with a lower bar than 随時改定, and the one people forget. ONE grade of movement is enough, and fixed pay need not have changed at all — which matt
calculate_payroll_batch — Runs calculate_payslip for many employees in one call and returns the run totals: gross, employee deductions, net, and employer cost. Reach for this the moment
decide_regular_remuneration_batch — Runs the annual 定時決定 for a whole payroll in one call, and reports which employees moved grade. 健康保険法第41条 puts every insured employee on the same schedule — the
judge_annual_average — For work whose April-June happens to be its busiest or quietest quarter, where the ordinary calculation would fix a grade that is wrong for eleven months of the
lookup_standard_remuneration — Maps a monthly amount to its health grade (1-50) and pension grade (1-32), with the standard remuneration each resolves to and whether the pension grade was cla
national_insurance — For anyone outside employee cover: the self-employed, freelancers, people between jobs. Use this instead of calculate_payslip when the person is not an employe
calculate_annual_cost — What one employee costs an employer over a year, bonuses included. Reach for this rather than multiplying a payslip by twelve, because the two do not agree onc
judge_annual_leave — Works out how many days of paid leave someone has been granted, and whether the employer still owes the five days it must direct. 労働基準法第39条 grants ten working
judge_worker_type — Decides whether someone is covered by health and pension insurance, and on which payment-basis day count their annual determination runs. Call this before deci
check_insurance_eligibility — The single most expensive month-end mistake in Japanese payroll, and one an assistant will get wrong from memory. Coverage ends the day AFTER the last day work
check_leave_exemption — Maternity and childcare leave look alike and behave differently. Maternity leave has no day-count test and exempts bonus premiums unconditionally; childcare lea
get_age_milestones — Returns the exact date each threshold is crossed and which premium starts or stops: long-term care begins at 40 and ends at 65, pension ends at 70, health insur
calculate_year_end_adjustment — Year-end adjustment (年末調整) for 2026 from the National Tax Agency's 令和8年分 booklet: the printed 給与所得控除後の給与等の金額 table (1,103 rows), the income-adjustment deduction
estimate_resident_tax — Estimate of next fiscal year's resident tax (住民税: 道府県民税 + 市町村民税 + 森林環境税) from the previous year's income and the municipality: employment income from the NTA ta
get_insurance_rates — Health insurance, long-term care, pension and child-support rates for a prefecture, plus the bonus caps and the employer-only child-care contribution. Health ra
get_minimum_wage — Hourly 地域別最低賃金 for a prefecture. Revisions take effect prefecture by prefecture from October, on different days, so a date matters — pass one when checking a pa
business_days — Count business days in a range, shift a date by N business days, or check one date. Covers 1955-2027 including substitute holidays, 国民の休日 (a weekday that is a h
validate_invoice_numbers_batch — Checks the National Tax Agency check digit on many qualified-invoice registration numbers in one call. Be careful how you report the result. A passing check di
validate_corporate_number — Checks the National Tax Agency check digit on a 13-digit 法人番号, or on a qualified invoice registration number (the same 13 digits prefixed with T). This proves
consumption_tax — The consumption tax rate in force on a date, with the national and local parts, and the reduced 8% rate for food and newspapers. Pass amount to have the tax wor
get_statute_text — Returns the full text of a Japanese statutory provision, as published by e-Gov. The judgement tools name the statute or notice their answer rests on, but not i
calculate_overtime_pay — Works out statutory premium pay under 労働基準法第37条 — overtime, night work and work on a statutory holiday. The rates do not simply add up, and getting this wrong
commuting_allowance_exemption — Works out how much of a commuting allowance escapes income tax, and states the amount that still counts as remuneration for social insurance. These are two dif
check_data_freshness — Japanese statutory figures change on fixed dates — insurance rates each March, employment insurance each April, minimum wage each October — and a stale table pr

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

npm registryjp-payroll-mcp

first seen 2 mo ago · fetched 11 h agoopen ↗

Official MCP Registryio.github.kishida-devil/jp-payroll-mcp

first seen 2 mo ago · fetched 2 d agoopen ↗

Field history (12 recent events)

2 mo ago · declared · name → "日本の給与・社会保険・労働法"
2 mo ago · declared · summary → "Japan payroll & social insurance. 日本の給与計算・社会保険。47都道府県の料率、源泉所得税、割増賃金、有給、標準報酬月額の改定、最低賃金。根拠の条文つき。"
2 mo ago · declared · description → "Japan payroll & social insurance. 日本の給与計算・社会保険。47都道府県の料率、源泉所得税、割増賃金、有給、標準報酬月額の改定、最低賃金。根拠の条文つき。"
2 mo ago · declared · publisherName → "kishida-devil"
2 mo ago · declared · repoUrl → "https://github.com/kishida-devil/jp-payroll-mcp"
2 mo ago · declared · repoUrl → null
2 mo ago · declared · license → "MIT"
2 mo ago · declared · summary → "日本の給与計算・社会保険・労務のMCPサーバー。Japanese payroll, social insurance and labour law for AI assistants and HTTP clients: 47都道府県の保険
2 mo ago · observed · packageFacts → {"name":"jp-payroll-mcp","registry":"npm","publishedAt":"2026-09-03T11:39:28.671Z","latestVersion":"0.4.5","weeklyDownlo
2 mo ago · declared · protocols → ["mcp"]
2 mo ago · declared · description → "日本の給与計算・社会保険・労務のMCPサーバー。Japanese payroll, social insurance and labour law for AI assistants and HTTP clients: 47都道府県の保険
2 mo ago · declared · publisherName → "duet0912"

when	check	result	http	latency	detail
4 h ago	mcp initialize	ok	200	157 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
14 h ago	mcp initialize	ok	200	101 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
23 h ago	mcp initialize	ok	200	93 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
30 h ago	mcp initialize	ok	200	125 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	92 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	56 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	136 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
2 d ago	mcp initialize	ok	200	99 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
3 d ago	mcp initialize	ok	200	76 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools
3 d ago	mcp initialize	ok	200	72 ms	server jp-payroll 0.4.5 · protocol 2025-06-18 · 30 tools

日本の給与・社会保険・労働法

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