Is the Plugrail Jp Calendar MCP server down?

mcp-registry/dev.plugrail/jp-calendar · v0.2.0

As of 2026-10-22 04:30 UTC, the Plugrail Jp Calendar MCP server is up with a Glimind reliability score of 97/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 1 outage in 90 days, with a median recovery of 5 minutes.

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

claude mcp add --transport http plugrail-jp-calendar-mcp-server https://jp-calendar.plugrail.dev/mcp

{
  "mcpServers": {
    "plugrail-jp-calendar-mcp-server": {
      "type": "http",
      "url": "https://jp-calendar.plugrail.dev/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: B (83/100)

What to fix (4)

Auto-fix: 2 corrected tool definitions

Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. All of them as JSON: /v1/readiness/mcp-registry%2Fdev.plugrail%2Fjp-calendar/fixes

{
  "name": "add_business_days",
  "description": "指定した日付(date)の翌日から数えてN営業日目(days)の日付を返します。dateの当日は数えません。daysが負の場合は過去方向（dateの前日から遡ってN営業日目）に計算します。土日・日本の祝日を除外し、calendar=\"banking\"を指定すると銀行休業日（12/31〜1/3）も除外します。dateが営業日かどうかだけ知りたい場合は is_holiday を使ってください（days=0でも同じ情報がskipped経由で得られます）。入力例: {\"date\": \"2026-07-10\", \"days\": 3}",
  "inputSchema": {
    "type": "object",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "required": [
      "date",
      "days"
    ],
    "properties": {
      "date": {
        "type": "string",
        "description": "起点日 YYYY-MM-DD。例: \"2026-07-10\"。この日自体は数えません。"
      },
      "days": {
        "type": "number",
        "description": "何営業日先(正)/前(負)かを表す整数。0も指定可: dateをそのまま返し、dateが非営業日ならskippedに1件（date自身とその理由）を記録します。"
      },
      "calendar": {
        "type": "string",
        "description": "\"standard\"（既定）または\"banking\"（銀行休業日も除外）。"
      },
      "extra_closed_dates": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "description": "顧客固有の追加休業日（YYYY-MM-DD の配列）。例: [\"2026-12-29\", \"2026-12-30\"]"
      }
    }
  },
  "annotations": {
    "readOnlyHint": false,
    "destructiveHint": false,
    "idempotentHint": false
  }
}

{
  "name": "list_holidays",
  "description": "指定した年または期間の日本の祝日一覧を返します。入力例: {\"year\": 2026} または {\"from\": \"2026-01-01\", \"to\": \"2026-06-30\"}",
  "inputSchema": {
    "type": "object",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "properties": {
      "to": {
        "type": "string",
        "description": "期間終了日 YYYY-MM-DD。例: \"2026-06-30\"。yearとは併用不可。"
      },
      "from": {
        "type": "string",
        "description": "期間開始日 YYYY-MM-DD。例: \"2026-01-01\"。yearとは併用不可。"
      },
      "year": {
        "type": "integer",
        "maximum": 9007199254740991,
        "minimum": -9007199254740991,
        "description": "西暦年。例: 2026。from/toとは併用不可。"
      }
    }
  },
  "annotations": {
    "readOnlyHint": true
  }
}

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/dev.plugrail/jp-calendar"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/dev.plugrail/jp-calendar"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• Every tool and parameter is described.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~800 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 100.00% uptime over 30 days.

Largest tool definitions

• business_days_between ~314 tokens
• add_business_days ~247 tokens
• list_holidays ~151 tokens
• is_holiday ~88 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Fdev.plugrail%2Fjp-calendar.svg)](https://glimind.com/server/mcp-registry%2Fdev.plugrail%2Fjp-calendar?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Fdev.plugrail%2Fjp-calendar?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fdev.plugrail%2Fjp-calendar.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fdev.plugrail%2Fjp-calendar.svg
   :target: https://glimind.com/server/mcp-registry%2Fdev.plugrail%2Fjp-calendar?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:bf31b0bb11eb6ab2…, first seen 2026-10-17, included at leaf 1660 of 43,724. Version history · verify what your client received.

Tools (4)

• add_business_days
• business_days_between
• is_holiday
• list_holidays

Compare: most reliable calendar servers

claude mcp add --transport http glimind https://glimind.com/mcp

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Plugrail Jp Calendar MCP server down right now?

As of 2026-10-22 04:30 UTC, the Plugrail Jp Calendar MCP server is up with a Glimind reliability score of 97/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 1 outage in 90 days, with a median recovery of 5 minutes.

How many tools does Plugrail Jp Calendar MCP server provide?

Plugrail Jp Calendar MCP server advertises 4 tools, including add_business_days, business_days_between, is_holiday, list_holidays.

How do I install Plugrail Jp Calendar MCP server?

Point your MCP client at this streamable-http endpoint: https://jp-calendar.plugrail.dev/mcp

Is the Plugrail Jp Calendar MCP server safe to connect to an AI agent?

Glimind scanned all 4 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Plugrail Jp Calendar MCP server?

Status page: 90-day uptime, every outage and how long it lasted.

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.