Comprehensive Model Context Protocol server for managing Home Assistant through AI assistants.
Nothing to run from here
Japan Business Tools is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
13
tools declared
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trust score
remote
at its publisher
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calls last 7d
What it does
Japanese holidays, business days, eras, postal codes, addresses and corporate numbers.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user --transport http japan-business-tools-mcp https://biz.ossalt.jp/mcp
# 2 — ask your agent for something these tools do
# list_holidays, check_business_day, add_business_days and 10 more
Japan Business Tools costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
OSAll 1 server
ossalt1 server
1 category
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine and nothing runs on ours: this server answers at its publisher’s own address, and what you install is the connection straight to it.
Claude Codedeclared by this listing
This is a public server: it answers at its publisher’s own address and this marketplace is not in the path. Claude Code registers it in one command; --scope user makes it available in every project. The transport below is http, as the publisher's own manifest declares it.
claude mcp add --scope user --transport http japan-business-tools-mcp https://biz.ossalt.jp/mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it answers at its publisher’s own address: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it writes
One config entry pointing straight at the publisher’s own address — this marketplace is not in the path, and nothing from this listing executes on your machine.
What you approve
13 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
List all Japanese national holidays and substitute holidays for a year, based on the National Holidays Act and verified against the Cabinet Office CSV. Each holiday has name (descriptive) and official_name (as written by the Cabinet Office). / その年の国民の祝日・休日（振替休日・国民の休日を含む）の一覧。name は内容がわかる名前、official_name は内閣府の表記。
| Parameter | Type | Required | Notes |
|---|---|---|---|
| year | integer | yes | Year (1980-2099) / 年 |
Check whether a date is a business day in Japan, and if not, why (weekend, holiday name, bank closure, or a custom closed day). reason is Japanese text; reason_code is one of weekend, holiday, bank_closure, extra_holiday (null on business days). flags: estimated/unverified when the year's holidays are an estimate. / その日が営業日かどうかと、休みの理由（土日・祝日の名前・銀行の休業日・指定された休日）。reason_code は weekend・holiday・
| Parameter | Type | Required | Notes |
|---|---|---|---|
| date | string | yes | Date (YYYY-MM-DD) / 日付 |
| calendar | string | no | "standard": weekends and national holidays are closed. "bank": also closed Dec 31 - Jan 3 (Japanese bank holidays). / standard：土日・祝日が休み。bank：加えて12月31日〜1月3日が休み（銀行の休業日） |
| extra_holidays | array | no | Additional company-specific closed days (e.g. summer break). / 会社独自の休み |
| extra_business_days | array | no | Days treated as business days even if they are weekends or holidays. / 休日でも営業日とする日 |
Return the date that is N business days after (or before, if N is negative) the given date. The start date itself is not counted; e.g. 1 business day after a Friday is the next Monday unless it is a holiday. / n営業日後（nが負なら前）の日付。起算日は数えない。
| Parameter | Type | Required | Notes |
|---|---|---|---|
| date | string | yes | Start date (YYYY-MM-DD) / 起算日 |
| days | integer | yes | Number of business days (negative = before) / 営業日の数（負なら前） |
| calendar | string | no | "standard": weekends and national holidays are closed. "bank": also closed Dec 31 - Jan 3 (Japanese bank holidays). / standard：土日・祝日が休み。bank：加えて12月31日〜1月3日が休み（銀行の休業日） |
| extra_holidays | array | no | Additional company-specific closed days (e.g. summer break). / 会社独自の休み |
| extra_business_days | array | no | Days treated as business days even if they are weekends or holidays. / 休日でも営業日とする日 |
Count business days from start to end, inclusive of both ends. Returns 0 if start is after end. The period can be up to 3,660 days (about 10 years). / start から end までの営業日の数（両端を含む）。start が end より後なら 0。期間は3,660日（約10年）まで。
| Parameter | Type | Required | Notes |
|---|---|---|---|
| start | string | yes | Start date (YYYY-MM-DD) / 開始日 |
| end | string | yes | End date (YYYY-MM-DD) / 終了日 |
| calendar | string | no | "standard": weekends and national holidays are closed. "bank": also closed Dec 31 - Jan 3 (Japanese bank holidays). / standard：土日・祝日が休み。bank：加えて12月31日〜1月3日が休み（銀行の休業日） |
| extra_holidays | array | no | Additional company-specific closed days (e.g. summer break). / 会社独自の休み |
| extra_business_days | array | no | Days treated as business days even if they are weekends or holidays. / 休日でも営業日とする日 |
If the date is a business day, return it as is; otherwise move to the next ("next") or previous ("previous") business day. Useful for payment due dates that fall on holidays. / 営業日ならその日、休みなら次（next）または前（previous）の営業日。支払日が休みのときなどに使う。
| Parameter | Type | Required | Notes |
|---|---|---|---|
| date | string | yes | Date (YYYY-MM-DD) / 日付 |
| direction | string | no | next = 後ろ倒し, previous = 前倒し |
| calendar | string | no | "standard": weekends and national holidays are closed. "bank": also closed Dec 31 - Jan 3 (Japanese bank holidays). / standard：土日・祝日が休み。bank：加えて12月31日〜1月3日が休み（銀行の休業日） |
| extra_holidays | array | no | Additional company-specific closed days (e.g. summer break). / 会社独自の休み |
| extra_business_days | array | no | Days treated as business days even if they are weekends or holidays. / 休日でも営業日とする日 |
Return the last business day of the given month. / その月の最終営業日。
| Parameter | Type | Required | Notes |
|---|---|---|---|
| year | integer | yes | Year (1980-2099) / 年 |
| month | integer | yes | Month (1-12) / 月 |
| calendar | string | no | "standard": weekends and national holidays are closed. "bank": also closed Dec 31 - Jan 3 (Japanese bank holidays). / standard：土日・祝日が休み。bank：加えて12月31日〜1月3日が休み（銀行の休業日） |
| extra_holidays | array | no | Additional company-specific closed days (e.g. summer break). / 会社独自の休み |
| extra_business_days | array | no | Days treated as business days even if they are weekends or holidays. / 休日でも営業日とする日 |
Convert a Gregorian date (YYYY-MM-DD) to the Japanese era calendar, e.g. 2026-10-07 → 令和8年10月7日 (wareki_short R8.10.07, zero-padded). Year 1 is written 元年. Supported from 1873-01-01 (the Gregorian calendar was adopted on 明治6年1月1日). Eras: 令和 (R) from 2019-05-01, 平成 (H) from 1989-01-08, 昭和 (S) from 1926-12-25, 大正 (T) from 1912-07-30, 明治 (M) from 1868-01-25. flags: assumes_current_era for dates aft
| Parameter | Type | Required | Notes |
|---|---|---|---|
| date | string | yes | Date (YYYY-MM-DD) / 日付 |
Convert a Japanese era date to YYYY-MM-DD. Accepts 令和8年10月7日, 令和元年5月1日, R8.10.7, H31/4/30, Reiwa 8.10.7, kanji numerals (昭和六十四年一月七日), a trailing weekday such as （水） or 水曜日, and full-width characters. input_era/input_era_year echo the input; actual is the correct era for that date. If the date is outside the input era (e.g. 平成31年5月1日, written after the era changed), it is still converted by c
| Parameter | Type | Required | Notes |
|---|---|---|---|
| wareki | string | yes | Japanese era date, e.g. 令和8年10月7日 or R8.10.7 / 和暦の日付 |
Look up the address (prefecture, city, town) for a 7-digit Japanese postal code, from Japan Post data. Accepts forms like 1000001, 100-0001 or 〒100-0001. One code can cover several towns; all are returned. town_detail holds the parenthesized part as written by Japan Post (e.g. chome ranges or building floors). If the code is a business-specific code (大口事業所個別番号) or a PO box code, the business is
| Parameter | Type | Required | Notes |
|---|---|---|---|
| postal_code | string | yes | 7-digit postal code, hyphen optional / 郵便番号（7桁、ハイフンは任意） |
Find Japanese postal codes by prefecture, city and (optionally) part of the town name, from Japan Post data. The city must be the full municipality name (e.g. 札幌市中央区, 新宿区); the county name may be omitted. With office_name, searches business-specific codes (大口事業所個別番号) of businesses in that city by name instead. Returns up to 100 matches. / 都道府県・市区町村・町域（部分一致、任意）から郵便番号を探す。市区町村は正式な名前で（郡名は省いてよい）。offi
| Parameter | Type | Required | Notes |
|---|---|---|---|
| prefecture | string | no | Prefecture, e.g. 東京都 (optional) / 都道府県（任意） |
| city | string | yes | Municipality, e.g. 新宿区 / 市区町村 |
| town | string | no | Part of the town name, e.g. 西新宿 (optional) / 町域の一部（任意） |
| office_name | string | no | Part of a business name, in kanji or katakana (optional) / 事業所名の一部（任意） |
Split a Japanese address into prefecture, city, town and the rest (block numbers, building), matching Japan Post's address data, and return candidate postal codes. Absorbs full/half-width, spacing, kanji vs. arabic numerals, ヶ/ケ and omitted county names; fills in the prefecture when the city is unique. Does NOT verify block/house numbers and has no coordinates. level tells how far the match went
| Parameter | Type | Required | Notes |
|---|---|---|---|
| address | string | yes | Japanese address, e.g. 北海道札幌市中央区大通西10丁目1-1 / 住所 |
Look up a 13-digit Japanese corporate number (法人番号) in the National Tax Agency's monthly bulk data: name, furigana, English name, kind, registered address and postal code, assignment date, and closure (date, cause, successor) if the registry record was closed. The check digit (first digit) is verified first; a wrong check digit is reported as an input error. flags: closed (the registry record is
| Parameter | Type | Required | Notes |
|---|---|---|---|
| corporate_number | string | yes | 13-digit corporate number, hyphens/spaces allowed / 法人番号（13桁。ハイフン・空白は任意） |
Find Japanese corporations whose name starts with the given text (prefix match), in the National Tax Agency's monthly bulk data. Legal-form words such as 株式会社 or 一般社団法人 are ignored at either end, and full/half-width and spaces are normalized. Matching in the middle of a name and furigana search are not supported. flags: truncated, exact_match_only (too many names start with the input; only exa
| Parameter | Type | Required | Notes |
|---|---|---|---|
| name | string | yes | Beginning of the corporate name (e.g. トヨタ自動車) / 法人の名前の先頭（例：トヨタ自動車） |
| prefecture | string | no | Prefecture to narrow down (optional, e.g. 東京都 or 東京) / 都道府県で絞り込む（任意） |
Free
$0 forever
- Every tool — any call limit is its publisher’s, not ours
- No card, and mcprush charges nothing for it
- Runs at its publisher’s own address — this marketplace is not in the path
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Japan Business Tools or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
—
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Alert at 80% · then the tool returns a normal MCP error
Used this month: —
—Grade not published
No rule-by-rule report on file for this release
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
This listing is an address its publisher runs, and you connect to it directly — this marketplace is not in the path. The scanner reads packages and public source, and an address is neither. So there is no grade — not a withheld one, an unmeasured one.
Release history
This is an address its publisher runs: which release it serves is theirs to choose, so there is nothing here to pin. The history below is for reading; the current release on file is 0.9.0.
0.9.0
undated
latestNo release note was published with this version.
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no reviews yet
Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Japan Business Tools can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.