Bring Public Holidays
to LangChain
Create your Vinkius account to connect Nager.Date to LangChain and start using all 6 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the 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.
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.
How it works
- Subscribe to this server
- No API Key required (Nager.Date is a free and open service)
- Start managing your global intelligence through Claude, Cursor, or any MCP-compatible client
Who is this for?
- Logistics Managers — monitor international holiday patterns and retrieve event metadata straight from your workflow.
- Product Owners — verify global launch dates and audit regional temporal constraints without manual searching.
- HR Specialists — perform rapid audits of public holidays for cross-functional global teams through natural language.
- Operations Leads — automate global event querying to orchestrate cross-functional international teams smoothly.
Built-in capabilities (6)
Get additional details for a specific country
Get the next public holidays for a specific country
Get the next public holidays occurring worldwide
Get all public holidays for a country and year
Check if today is a public holiday in a country
Date. List all countries supported by Nager.Date
Why LangChain?
LangChain's ecosystem of 500+ components combines seamlessly with Nager.Date through native MCP adapters. Connect 6 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.
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The largest ecosystem of integrations, chains, and agents. combine Nager.Date MCP tools with 500+ LangChain components
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Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step
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LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging
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Memory and conversation persistence let agents maintain context across Nager.Date queries for multi-turn workflows
Nager.Date in LangChain
Why run Nager.Date with Vinkius?
The Nager.Date connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 6 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect Nager.Date using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
Nager.Date and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect Nager.Date to LangChain through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
Nager.Date for LangChain
Every request between LangChain and Nager.Date is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
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.
How does LangChain connect to MCP servers?
Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.
Which LangChain agent types work with MCP?
All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.
Can I trace MCP tool calls in LangSmith?
Yes. All MCP tool invocations appear as traced steps in LangSmith, showing input parameters, response payloads, latency, and token usage.
MultiServerMCPClient not found
Install: pip install langchain-mcp-adapters
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