MCP.Market

PlugRail Japanese Calendar MCP server

online · 100% uptime
by plugrail.dev·dev.plugrail/jp-calendar·v0.2.0
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Japanese holiday and business-day calculations using official Japan Cabinet Office data.

A92/100grade A
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PlugRail Japanese Calendar tools

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How PlugRail Japanese Calendar compares

Against every graded Productivity MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
92/100
higher than 90% of 1,297 Productivity servers
Uptime
100%
of our recent checks; the typical remote Productivity server answers 100%
Response time
1,452 ms
faster than 5% of 654 Productivity servers

Release history: 2 versions in the registry since 2026-07-11, latest 2026-10-07, typically one every 88 days.

Install PlugRail Japanese Calendar in Claude Code, Cursor or VS Code

claude mcp add --transport http jp-calendar https://jp-calendar.plugrail.dev/mcp
Add to Cursor

What the publisher says

From the PlugRail Japanese Calendar repository's README, as published. We do not edit it. Read it on GitHub

plugrail

A collection of MCP servers that connect to Japanese public data. The name alone does not describe the project, so plugrail is not related to railways or railway services.

Live servers

Connect

See the jp-calendar connection guide.

Self-hosting

  1. In packages/servers/jp-calendar/, copy wrangler.example.jsonc to wrangler.jsonc and fill in your Cloudflare resource IDs.
  2. Create the D1 database and KV namespace referenced by that configuration.
  3. Run pnpm --filter @plugrail/jp-calendar deploy.

The self-hosted server runs independently. Authentication, rate limiting, and usage metering are features of the hosted service only.

Architecture

MCP client
    |
    v
jp-calendar Worker --> Cloudflare D1 (holiday data)
                   --> Cloudflare KV (cached data)

Sources and disclaimer

This is not an official service of the National Tax Agency, the Digital Agency, or any other Japanese government body. Information provided does not represent their official views and is not guaranteed by them.

Source: Adapted from the Cabinet Office "National Holidays" page (https://www8.cao.go.jp/chosei/shukujitsu/gaiyou.html)

Contributing

Issues and pull requests are welcome. Please include enough context to reproduce a problem or explain a proposed change.

License

MIT. See LICENSE.

Nothing above is checked by us. What we check is on the safety report.

PlugRail Japanese Calendar: common questions

Is PlugRail Japanese Calendar MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the PlugRail Japanese Calendar safety report
How do I install PlugRail Japanese Calendar?
It runs remotely at jp-calendar.plugrail.dev. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does PlugRail Japanese Calendar need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is PlugRail Japanese Calendar maintained?
The last commit was 39 days ago (2026-09-24). The latest release is v0.2.0.
Is PlugRail Japanese Calendar up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of PlugRail Japanese Calendar?
Servers from other publishers that do the same job: Agent-Native Calendar MCP server, AIquila — Nextcloud MCP Server and Intervals Icu MCP server.
How does PlugRail Japanese Calendar compare with other Productivity MCP servers?
safety score 92/100 (higher than 90% of 1,297 Productivity servers); uptime 100% (of our recent checks; the typical remote Productivity server answers 100%); response time 1,452 ms (faster than 5% of 654 Productivity servers). Full comparison.

Alternatives to PlugRail Japanese Calendar

Same job from other publishers: the closest match first, then the best rated.

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  • AIquila — Nextcloud MCP Server
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  • Caldav
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    B

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