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Connect Calendarific (Alternative) to ChatGPT and Claude

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. Stop guessing when international offices and banks are closed.

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 · 2 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-02

2 capabilities in this set.

Part of 2 available through Calendarific.

  1. 01

    List supported countries

    This capability returns a list of all countries and regions supported by the service. Use it to find the correct ISO code for a specific country.

  2. 02

    Get holidays

    This capability fetches holiday data for a specific country and year. It provides details on public and bank holidays for the requested period.

Real work

What teams actually run

01

International Scheduling

Your agent checks for local holidays before suggesting a meeting time for a global team.

02

Financial Planning

The agent identifies bank holidays to ensure transactions happen on business days.

03

Travel Logistics

You ask your agent to find public festivals in a specific country to plan a trip.

04

Marketing Timing

The agent identifies religious holidays to help time regional promotional campaigns.

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

878ms average. Fast in production.

Calendarific is checked daily against the live service.

Daily averagePeak 1114ms
Oct 3Today
Fastest day
733ms
Slowest day
1114ms
14-day trend
Slowing+13%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 2 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_R4cMekmSDiSSDuWvKyGG20vgUjQK3k5YIM5N6BZg/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-alternative-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_R4cMekmSDiSSDuWvKyGG20vgUjQK3k5YIM5N6BZg/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.

This MCP is built for professionals managing operations, logistics, or communications across different time zones and borders.

  • 01

    Project Managers

    They hand off the task of checking international team availability to the agent.

  • 02

    Travel Planners

    They use the agent to identify local festivals and bank holidays in destination countries.

  • 03

    Operations Teams

    They automate regional availability checks and calendar updates.

  • 04

    E-commerce Managers

    They use the agent to time marketing campaigns around regional holidays.

FAQ

Questions Calendarific owners ask.

  • 01

    How many countries are supported?

    The MCP supports over 200 countries and regions.

  • 02

    Do I need my own API key?

    Yes, you will need to enter your Calendarific API key to use this MCP.

  • 03

    Which AI clients can use this?

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

  • 04

    Can I find religious holidays?

    Yes, the capability provides metadata including religious and national holiday types.

  • 05

    Can I filter holidays by month?

    Yes, your agent can filter holiday results by specific months or days.

  • 06

    Can I see all holidays in Brazil for 2024?

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

  • 07

    How do I find the ISO code for a country?

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

  • 08

    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 capabilities.

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