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Connect Calendarific to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Manage international schedules and regional observances through natural conversation.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 6 capabilities

We ship only the actions that matter.

Capability set01 / 02

01-03

3 capabilities in this set.

Part of 6 available through Calendarific.

  1. 01

    Get account info

    This capability checks the current status of your Calendarific integration.

  2. 02

    List holidays by location

    Use this to find holidays specific to a certain state or region.

  3. 03

    List holidays

    This capability pulls a full list of holidays for a specific country and year.

Capability set02 / 02

04-06

3 capabilities in this set.

Part of 6 available through Calendarific.

  1. 04

    List holidays by type

    This capability filters holiday lists by category, such as religious or national observances.

  2. 05

    List supported countries

    This capability returns a directory of all supported countries and their ISO codes.

  3. 06

    List supported languages

    This capability provides a list of all languages supported by the service.

Real work

What teams actually run

01

Global Team Scheduling

Check for upcoming holidays in a specific country to avoid scheduling meetings during local closures.

02

Travel Planning

Ask your agent to find religious observances in a destination to plan around local festivities.

03

Project Management

Identify regional holidays to adjust project deadlines and resource availability.

04

Data Integration

Use the agent to fetch specific holiday metadata for application logic.

Automate a task

Put Calendarific to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Calendarific works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Calendarific to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

804ms average. Fast in production.

Calendarific is checked daily against the live service.

Daily averagePeak 957ms
Oct 3Today
Fastest day
683ms
Slowest day
957ms
14-day trend
Slowing+21%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 6 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Calendarific, so you can see the experience inside your AI.

It does not authenticate your account with Calendarific. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Calendarific Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_l1UKd1aDzxlrDprsCz8S1H4eO9YTZT5Fr3lY2TJK/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Calendarific capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "calendarific-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_l1UKd1aDzxlrDprsCz8S1H4eO9YTZT5Fr3lY2TJK/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Calendarific in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Calendarific owners hand off.

Professionals managing distributed teams or international logistics use this to keep schedules accurate.

  • 01

    Operations Managers

    They ask the AI to check for upcoming holidays in international offices to prevent scheduling conflicts.

  • 02

    Logistics Teams

    They use the agent to retrieve regional holiday calendars for resource planning.

  • 03

    Developers

    They use natural language to pull holiday data into their existing workflows.

FAQ

Questions Calendarific owners ask.

  • 01

    How many countries does this MCP support?

    The MCP provides access to holiday data for over 230 supported countries.

  • 02

    Can I find holidays for a specific state?

    Yes, you can use the capability to filter holidays by a specific state or region.

  • 03

    What kind of holidays can I look up?

    You can retrieve public, religious, and local holidays.

  • 04

    Which AI clients can I use with this?

    You can use this MCP with any compatible client, including Claude, Cursor, and Windsurf.

  • 05

    Do I need my own API key?

    Yes, you will need to enter your Calendarific API key to use the capability.

  • 06

    How do I list all the holidays for a specific country in 2024?

    Simply ask the agent to list_holidays and provide the Country code (e.g., 'US' or 'BR') and the year '2024'. It will retrieve the full list from Calendarific.

  • 07

    Can I filter holidays by type, like only religious holidays?

    Yes! Use the list_holidays_by_type capability and provide the country, year, and type (e.g., 'religious'). Your agent will return only the matching observances.

  • 08

    How do I see which countries are supported by Calendarific?

    Use the list_supported_countries capability. It will retrieve the complete directory of over 230 countries currently available in the Calendarific API.

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