Bring Holidays
to LangChain
Create your Vinkius account to connect Holiday API to LangChain and start using all 5 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.
Compatible with every major AI agent and IDE
What is the Holiday API MCP Server?
Empower your AI agent to orchestrate your entire global event and holiday research workflow with Holiday API, the reliable source for holiday data. By connecting Holiday API to your agent, you transform complex calendar auditing into a natural conversation. Your agent can instantly retrieve public holidays for any country, audit workday counts, and identify supported languages without you ever touching a manual calendar. Whether you are planning international logistics or managing global payroll, your agent acts as a real-time event consultant, ensuring your schedules are always accurate and compliant.
What you can do
- Holiday Auditing — Retrieve public and federal holidays for over 200 countries and retrieve detailed metadata, including names and dates.
- Workday Oversight — Calculate the next workday or count workdays between two dates to maintain a clear view of operational periods.
- Global Discovery — List all supported countries and languages in the Holiday API catalog to identify regional event markers.
- Temporal Intelligence — Query holidays for specific years to audit past and future global events instantly.
- Usage Monitoring — Get real-time API usage and status metadata to maintain strict control over your research volume.
How it works
- Subscribe to this server
- Enter your Holiday API Key
- Start managing your event intelligence through Claude, Cursor, or any MCP-compatible client
Who is this for?
- Logistics Managers — monitor international holidays and retrieve workday metadata straight from your workflow.
- HR Specialists — verify global public holidays and audit payroll cycles without manual searching.
- Travel Planners — perform rapid audits of local events and identify peak holiday periods through natural language.
- Operations Leads — automate holiday data querying to orchestrate cross-functional global teams smoothly.
Built-in capabilities (5)
Get public holidays for a country and year
Get the date after a number of workdays from a start date
Count the number of workdays between two dates
List all countries supported by Holiday API
List all languages supported by Holiday API
Why LangChain?
LangChain's ecosystem of 500+ components combines seamlessly with Holiday API through native MCP adapters. Connect 5 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 Holiday API 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 Holiday API queries for multi-turn workflows
Holiday API in LangChain
Why run Holiday API with Vinkius?
The Holiday API 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 5 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 Holiday API using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
Holiday API and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect Holiday API 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
Holiday API for LangChain
Every request between LangChain and Holiday API 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
How do I find my Holiday API Key?
Log in to your Holiday API dashboard, and you will find your API Key on the main page. Copy and paste it below.
Does the agent support historical years?
Yes. Holiday API provides historical data. Depending on your plan, you can query holidays for past years to audit previous events.
Can the agent calculate the number of workdays?
Yes. The get_workdays_count tool allows your agent to calculate the exact number of non-holiday business days between two dates for any 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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