Can I see all holidays in Brazil for 2024?

Yes! Use the `get_holidays` tool with the country 'BR' and the year 2024. It will return a full list of public and bank holidays.

How do I find the ISO code for a country?

Use the `get_countries` tool. It returns a comprehensive list of all supported countries along with their 2-letter ISO codes (e.g., 'US', 'FR', 'JP').

Does this include religious holidays like Easter?

Yes. Calendarific tracks national, bank, and religious holidays. You can identify the type of holiday in the metadata returned by the tools.

Calendarific Alternative MCP Server for LangChain 2 tools — connect in under 2 minutes

Name: Calendarific Alternative
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 2 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Calendarific Alternative through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "calendarific-alternative": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Calendarific Alternative, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

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 Calendarific Alternative MCP Server

Equip your AI agent with global temporal intelligence through the Calendarific MCP server. This integration provides real-time access to a comprehensive database of public, bank, and religious holidays for over 200 countries. Your agent can retrieve holiday lists for specific years, filter results by month or day, and explore the list of supported countries and languages. Whether you are scheduling international meetings, planning travels, or auditing regional availability, your agent acts as a dedicated global calendar coordinator through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Calendarific Alternative through native MCP adapters. Connect 2 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.

What you can do

Holiday Retrieval — Fetch all public and bank holidays for a country and year.
Temporal Filtering — Narrow down holidays by specific months or days for precise scheduling.
Country Intelligence — List all supported countries and their ISO codes for global operations.
Metadata Access — View detailed holiday descriptions and types (religious, national, etc.).
Holiday Auditing — Summarize and compare holiday calendars between different countries for better coordination.

The Calendarific Alternative MCP Server exposes 2 tools through the Vinkius. Connect it to LangChain 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 Calendarific Alternative to LangChain via MCP

Follow these steps to integrate the Calendarific Alternative MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 2 tools from Calendarific Alternative via MCP

Why Use LangChain with the Calendarific Alternative MCP Server

LangChain provides unique advantages when paired with Calendarific Alternative through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Calendarific Alternative MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Calendarific Alternative queries for multi-turn workflows

Calendarific Alternative + LangChain Use Cases

Practical scenarios where LangChain combined with the Calendarific Alternative MCP Server delivers measurable value.

RAG with live data: combine Calendarific Alternative tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Calendarific Alternative, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Calendarific Alternative tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Calendarific Alternative tool call, measure latency, and optimize your agent's performance

Calendarific Alternative MCP Tools for LangChain (2)

These 2 tools become available when you connect Calendarific Alternative to LangChain via MCP:

get_holidays

Get holidays for a country and year

list_supported_countries

List all supported countries

Example Prompts for Calendarific Alternative in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Calendarific Alternative immediately.

"What are the bank holidays in the UK for May 2024?"

"Check if there are any holidays in Japan on November 3rd."

"List all countries supported by Calendarific."

Troubleshooting Calendarific Alternative MCP Server with LangChain

Common issues when connecting Calendarific Alternative to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Calendarific Alternative + LangChain FAQ

Common questions about integrating Calendarific Alternative MCP Server with LangChain.

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.