Ext Ops Panel
Open dashboard

PlugRail Japanese Calendar

Japanese holiday and business-day calculations using official Japan Cabinet Office data.

MCP server · by plugrail.dev

About

PlugRail Japanese Calendar is an MCP server published by plugrail.dev. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.

What it asks for

  • Runs remotely

None of the marketplaces we read publishes its tools or the settings it asks for.

What it declares, asks for and runs, in full

Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.

Works with

  • Claude Code
  • Codex
  • Cursor
  • VS Code
  • Copilot CLI

A one-click link opens the client, which asks you to confirm before it adds the server.

From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.

Connect

Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.

As a remote MCP server

Built from what Official MCP Registry declares.

Claude CodeTerminal
claude mcp add --transport http jp-calendar https://jp-calendar.plugrail.dev/mcp
Codex~/.codex/config.toml
[mcp_servers.jp-calendar]
url = "https://jp-calendar.plugrail.dev/mcp"
Cursor~/.cursor/mcp.json
{
  "mcpServers": {
    "jp-calendar": {
      "url": "https://jp-calendar.plugrail.dev/mcp"
    }
  }
}

Where it is published

MarketplaceStatusVersionFiguresVerifiedFirst seen
Official MCP Registry (Open the registry record) Listed 0.2.0 Forks (GitHub): 0
Stars (GitHub): 0
Not marked

Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.

What changed

Nothing has moved on this plugin since we started watching it.

Similar plugins

Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.

  • Japan Business Tools

    Japanese holidays, business days, eras, postal codes, addresses and corporate numbers.

    by ossalt.jp · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • mcp-jp-calendar io.github.skypier-jp-works/mcp-jp-calendar

    MCP server for Japanese business days, holidays, and fiscal-period calculations.

    by skypier-jp-works · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Holidays

    Holidays MCP — wraps Nager.Date API (free, no auth)

    by pipeworx-io · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • AU Agent Utilities

    Reliable Australian business-day, public-holiday and deadline tools for AI agents.

    by creatorhub121 · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Inday - Public Holiday API

    Public holiday data for 30+ countries. Check holidays, working days and calendars via AI assistants.

    by gokhanibrikci · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Urlaub Smart

    Plan vacation days around public holidays, bridge days and school holidays in DE, AT and CH

    by urlaub-smart.de · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Japan Utils

    Japan utilities for AI agents: era, romaji, postal codes, holidays, kana, name splitting.

    by vivek081166 · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Shirabe Japan Data Hub

    Japan data tools for AI agents: calendar (rokuyo), address, name splitting, corporate number lookup

    by shirabe.dev · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • WorkdayAPI

    Business-day and public-holiday math for 29 countries: add business days, days between, holidays.

    by workdayapi.mike-tusa.workers.dev · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • bizdays io.github.qinisolabs/bizdays

    Verified business-day math for AI agents: holidays + per-country weekends, not guesses.

    by qinisolabs · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

Similar plugins by marketplace

The same question asked of one marketplace at a time: is there an analog of this plugin there?

Has a listing on Claude Code: claude-plugins-community (5)
  • global-entry-appointment-scanner

    Find open Global Entry and NEXUS appointment slots and get notified. Includes a skill that helps you search for slots, set up continuous background monitoring, configure…

    by JaiminBrahmbhatt · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • jp-web-design-guardrails

    Guardrails for building Japanese-ready web interfaces. Automatically enforces correct CJK typography (font stacks, line-height, kinsoku shori), Japanese form conventions (furigana…

    by mrslbt · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • claude-insights

    Weekly and monthly journal pattern recognition. Floor trends, life coach observations, advisory panel. Companion to claude-daily-journal.

    by adelaidasofia · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • bengo-toolkit

    Japanese law firm plugin for Claude Code — court template filling, family tree generation (相続関係説明図), legal document proofreading, lawsuit analysis, e-Gov law search, and…

    by llamadrive · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • hk-skills

    Real-time Hong Kong weather data from HK Observatory. Supports English, Traditional & Simplified Chinese with natural language queries.

    by ke11 · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

Has a listing on Claude Code: claude-plugins-official (5)
  • hookify

    Easily create custom hooks to prevent unwanted behaviors by analyzing conversation patterns or from explicit instructions. Define rules via simple markdown files.

    by Anthropic · Plugin bundle

    Listed on: Claude Code: claude-plugins-official · Describes nearly the same job

  • remember

    Continuous memory for Claude Code. Extracts, summarizes, and compresses conversations into tiered daily logs. Claude remembers what you did yesterday.

    by Digital-Process-Tools · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces · Describes nearly the same job

  • receipts

    A personal Claude Code impact report for justifying your usage to a manager or a self-review: what you shipped, which projects it went to, and each project's share of your usage…

    by Anthropic · Plugin bundle

    Listed on: Claude Code: claude-plugins-official · Describes nearly the same job

  • Intuit QuickBooks

    QuickBooks business insights and actions: financial health briefings across P&L, cash flow, balance sheet and A/R, industry benchmarking, payroll cost analysis, overdue-invoice…

    by intuit · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes nearly the same job

  • Airwallex

    Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…

    by airwallex · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins, Community GitHub marketplaces · Describes nearly the same job

Has a listing on Claude: knowledge-work-plugins (5)
  • Finance

    Streamline finance and accounting workflows, from journal entries and reconciliation to financial statements and variance analysis. Speed up audit prep, month-end close, and…

    by Anthropic · Plugin bundle

    Listed on: Claude: knowledge-work-plugins · Describes nearly the same job

  • Productivity

    Manage tasks, plan your day, and build up memory of important context about your work. Syncs with your calendar, email, and chat to keep everything organized and on track.

    by Anthropic · Plugin bundle

    Listed on: Claude: knowledge-work-plugins · Describes nearly the same job

  • Human Resources

    Streamline people operations — recruiting, onboarding, performance reviews, compensation analysis, and policy guidance. Maintain compliance and keep your team running smoothly.

    by Anthropic · Plugin bundle

    Listed on: Claude: knowledge-work-plugins · Describes nearly the same job

  • Intuit QuickBooks

    QuickBooks business insights and actions: financial health briefings across P&L, cash flow, balance sheet and A/R, industry benchmarking, payroll cost analysis, overdue-invoice…

    by intuit · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes nearly the same job

  • NetSuite AI Companion

    Guides AI assistants that use the NetSuite AI Connector: tool-selection order, output formatting, NetSuite domain knowledge, multi-subsidiary and currency handling, and SuiteQL…

    by oracle · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes nearly the same job

Has a listing on Codex: openai-curated (openai/plugins) (5)
  • Google Calendar

    Connect Google Calendar for scheduling, availability, daily briefs, and event management.

    by OpenAI · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • Outlook Calendar

    Connect Microsoft Outlook Calendar for scheduling, daily briefs, event prep, and safe meeting changes.

    by OpenAI · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • ClickUp

    Turn Codex into your ClickUp command center.

    by ClickUp · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes a similar job

  • Linear

    Search, create and update Linear issues, projects, and initiatives. Draft PRDs, write updates, analyze customer requests, and keep plans up to date — all from within ChatGPT

    by Linear Orbit, Inc · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes a similar job

  • Airtable

    Bring operational data and context into the flow of your ChatGPT conversations. You can ask questions, create and update records, and analyze your data—all through conversation…

    by Airtable · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes a similar job

Has a listing on Community GitHub marketplaces (5)
  • gnomon

    Deterministic batch tools so LLM agents stop guessing dates and math.

    by lihtness · MCP server

    Listed on: Official MCP Registry, Community GitHub marketplaces · Describes nearly the same job

  • Ireland MCP

    Read-only Irish public data for AI assistants: stats, weather, transport, law, property and maps.

    by c-mongan · MCP server

    Listed on: Official MCP Registry, Community GitHub marketplaces · Describes a similar job

  • dogg-world-check

    Verified, citable numbers about the world right now, each with a public tick and SHA-256 fingerprint.

    by Wildhaven Homes LLC · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes a similar job

  • dogg-world-check

    Verified, citable numbers about the world right now, each with a public tick and SHA-256 fingerprint.

    by Wildhaven Homes LLC · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes a similar job

  • skylight-mcp io.github.chrischall/skylight-mcp

    Skylight Calendar for Claude — family events, chores, and rewards.

    by chrischall · MCP server

    Listed on: Official MCP Registry, Community GitHub marketplaces · Describes a similar job

Has a listing on Copilot CLI: github/awesome-copilot (5)
  • anarlog

    Query Anarlog meetings locally, or connect through OAuth to read opted-in Cloud snapshots.

    by fastrepl · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • roundup

    Self-configuring status briefing generator. Learns your communication style from examples, discovers your data sources, and produces draft updates for any audience on demand.

    by Awesome Copilot Community · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • chronicle-stats

    See your local Copilot token usage by day, model, and session, and get tips to use it more efficiently.

    by Julia Muiruri · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • edge-ai-tasks

    Task Researcher and Task Planner for intermediate to expert users and large codebases - Brought to you by microsoft/edge-ai

    by Awesome Copilot Community · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • token-pacman

    Visualizes live session AI-credit usage as a Pac-Man board with pellets, ghosts, fruit milestones, and game-over limits.

    by James Montemagno · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

Has a listing on Copilot CLI: github/copilot-plugins (5)
  • workiq-productivity

    WorkIQ productivity skills powered by the local WorkIQ CLI — read-only insights across email, meetings, calendar, Teams, SharePoint, projects, and people.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • workiq

    Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • microsoft-365-agents-toolkit

    Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • azure-devops-copilot-plugin

    Bring Azure DevOps work-item, repository, and pull-request workflows into GitHub Copilot.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes a similar job

  • canvas-apps

    Build Power Apps Canvas Apps using the Canvas Authoring MCP server.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes a similar job

Has a listing on Cursor: cursor/plugins (5)
  • Workday

    Look up workers, organizations, time off, payroll, and recruiting data in Workday.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Outlook Calendar

    List, create, update, and cancel Microsoft Outlook calendar events.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Calendly

    Check availability and book, cancel, or reschedule.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Navan

    Query expenses, travel bookings, policies, and cards.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Craft

    Search, create, and update documents and daily notes.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

Has a listing on Docker MCP Catalog (5)
  • Time (Reference)

    Time and timezone conversion capabilities.

    by modelcontextprotocol · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • Humanitarian Data Exchange

    HDX MCP Server provides access to humanitarian data through the Humanitarian Data Exchange (HDX) API - https://data.humdata.org/hapi. This server offers 33 specialized tools for…

    by dividor · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • WolframAlpha

    Connect your chat repl to wolfram alpha computational intelligence.

    by SecretiveShell · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • Camunda BPM Process Engine

    Tools to interact with the Camunda 7 Community Edition Engine using the Model Context Protocol (MCP). Whether you're automating workflows, querying process instances, or…

    by lepoco · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • Google Flights

    Interact with Google Flights data to search for one-way, round-trip, and date range flight options between airports.

    by kgprs · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

Has a listing on Official MCP Registry (5)
  • Japan Business Tools

    Japanese holidays, business days, eras, postal codes, addresses and corporate numbers.

    by ossalt.jp · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • mcp-jp-calendar io.github.skypier-jp-works/mcp-jp-calendar

    MCP server for Japanese business days, holidays, and fiscal-period calculations.

    by skypier-jp-works · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Holidays

    Holidays MCP — wraps Nager.Date API (free, no auth)

    by pipeworx-io · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • AU Agent Utilities

    Reliable Australian business-day, public-holiday and deadline tools for AI agents.

    by creatorhub121 · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Inday - Public Holiday API

    Public holiday data for 30+ countries. Check holidays, working days and calendars via AI assistants.

    by gokhanibrikci · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.

Is this your plugin?

Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.

Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.

Where the data comes from: how the catalog is built