Is an API Key required for Nager.Date?

No. Nager.Date is a free and open service. This server works out of the box without any static credentials required.

Can the agent check if today is a holiday?

Yes. Use the `is_holiday_today` tool providing the 2-letter country code. Your agent will return a boolean indicating if it is a public holiday today instantly.

Does it support local names for holidays?

Yes. The holiday records retrieved by your agent include both the English name and the local name used in that specific country.

Nager.Date MCP Server for Claude Desktop 6 tools — connect in under 2 minutes

Name: Nager.Date
Availability: InStock
Author: Vinkius

modelcontextprotocol.io/quickstart/user

Built by Vinkius GDPR 6 Tools IDE

Claude Desktop is Anthropic's native application for interacting with Claude AI models on macOS and Windows. It was the first consumer application to ship with built-in MCP support, making it the reference implementation for the Model Context Protocol standard.

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The modern way to manage MCP Servers — no config files, no terminal commands. Install Nager.Date and 2,500+ MCP Servers from a single visual interface.

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Classic Setup·json

{
  "mcpServers": {
    "nagerdate": {
      // Your Vinkius token. get it at cloud.vinkius.com
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Nager.Date MCP Server

Empower your AI agent to orchestrate your entire public holiday and global event research workflow with Nager.Date, the open source API for world holidays. By connecting Nager.Date to your agent, you transform complex calendar auditing into a natural conversation. Your agent can instantly retrieve public holidays for over 100 countries, audit upcoming events worldwide, and identify regional variations without you ever touching a manual calendar. Whether you are planning international logistics or managing global product launches, your agent acts as a real-time event consultant, ensuring your schedules are always accurate and well-informed.

Claude Desktop is the definitive way to connect Nager.Date to your AI workflow. Add Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 6 tools in the chat interface. ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.

What you can do

Holiday Auditing — Retrieve all public holidays for any specific country and year to maintain a clear view of global event cycles.
Real-time Status — Check if today is a public holiday in any country to assist in immediate operational decision-making.
Event Discovery — Retrieve the next occurring public holidays worldwide to understand global temporal patterns instantly.
Regional Intelligence — Query country-specific details, including common names and geographic regions, to assist in localization.
Global Discovery — List all available countries in the Nager.Date catalog to identify regional event markers.

The Nager.Date MCP Server exposes 6 tools through the Vinkius. Connect it to Claude Desktop in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Nager.Date to Claude Desktop via MCP

Follow these steps to integrate the Nager.Date MCP Server with Claude Desktop.

Open Claude Desktop Settings

Go to Settings → Developer → Edit Config to open claude_desktop_config.json

Add the MCP Server

Paste the configuration above into the mcpServers section

Restart Claude Desktop

Close and reopen Claude Desktop to load the new server

Start using Nager.Date

Look for the 🔌 icon in the chat. your 6 tools are now available

Why Use Claude Desktop with the Nager.Date MCP Server

Claude Desktop by Anthropic provides unique advantages when paired with Nager.Date through the Model Context Protocol.

Claude Desktop is the reference MCP client. it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available

Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface

Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions

Enterprise-grade security with local config storage. your tokens never leave your machine, and connections go directly to Vinkius Edge network

Nager.Date + Claude Desktop Use Cases

Practical scenarios where Claude Desktop combined with the Nager.Date MCP Server delivers measurable value.

Interactive data exploration: ask Claude to query DNS records, look up WHOIS data, and cross-reference results in a single conversation

Ad-hoc security audits: type a domain name and let Claude enumerate subdomains, check DNS history, and flag configuration anomalies. all through natural language

Executive briefings: generate comprehensive domain intelligence reports by asking Claude to compile findings into a formatted summary

Learning and training: new team members can explore API capabilities conversationally without needing to read documentation

Nager.Date MCP Tools for Claude Desktop (6)

These 6 tools become available when you connect Nager.Date to Claude Desktop via MCP:

get_country_details

Get additional details for a specific country

get_next_holidays

Get the next public holidays for a specific country

get_next_holidays_worldwide

Get the next public holidays occurring worldwide

get_public_holidays

Get all public holidays for a country and year

is_holiday_today

Check if today is a public holiday in a country

list_available_countries

Date. List all countries supported by Nager.Date

Example Prompts for Nager.Date in Claude Desktop

Ready-to-use prompts you can give your Claude Desktop agent to start working with Nager.Date immediately.

"What are the public holidays in 'US' for 2024 using Nager.Date?"

"Is today a public holiday in Brazil?"

"Show the next 5 public holidays occurring worldwide."

Troubleshooting Nager.Date MCP Server with Claude Desktop

Common issues when connecting Nager.Date to Claude Desktop through the Vinkius, and how to resolve them.

Server not appearing after restart

Ensure the JSON is valid (no trailing commas). Check the file path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\\Claude\\ (Windows).

Authentication error

Verify your Vinkius token is correct. Go to cloud.vinkius.com to regenerate it if needed.

Tools not showing in chat

Click the 🔌 icon at the bottom of the chat input. If it shows 0 tools, the server may still be connecting. wait a few seconds.

Nager.Date + Claude Desktop FAQ

Common questions about integrating Nager.Date MCP Server with Claude Desktop.

How does Claude Desktop discover MCP tools?

When Claude Desktop starts, it reads the claude_desktop_config.json file and connects to each configured MCP server. It calls the tools/list endpoint to fetch the schema for every available tool, then surfaces them as clickable options in the chat interface via the 🔌 icon.

What happens if the MCP server is temporarily unavailable?

Claude Desktop handles disconnections gracefully. if the server is unreachable at startup, the tools simply won't appear. Once the server becomes available again, restarting Claude Desktop will re-establish the connection. There is no timeout penalty or error loop.

Can I connect multiple MCP servers simultaneously?

Yes. You can add as many servers as you need in the mcpServers section of the config file. Each server appears as a separate tool provider, and Claude can use tools from multiple servers in a single conversation turn.

Is there a limit on the number of tools per server?

Claude Desktop can handle hundreds of tools per server. However, for optimal LLM performance, Vinkius servers are designed to expose focused, well-documented tool sets rather than overwhelming the model with too many options.

Does Claude Desktop support Streamable HTTP transport?

Yes. Claude Desktop supports both SSE (Server-Sent Events) and the newer Streamable HTTP transport that Vinkius uses. Simply provide the server URL. Claude auto-negotiates the transport protocol.