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ClaudeChatGPTPerplexityGeminiMicrosoft CopilotRaycastMeta AIGrokZ.aiQwenKimi
DeepSeekMistralCursorVS CodeWindsurfJetBrainsClineLovableVercel AI SDKLangChain

Use date-fns with your AI.

Connect your account once and let the AI you already use work with it, without building another integration. Stop LLMs from calculating SLAs incorrectly. An local, deterministic engine that adds business days while perfectly avoiding weekends and Brazilian national hol

Included with plan

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

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

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Complete set · 2 capabilities

The complete date-fns capability set.

These are the exact actions your AI can choose when you ask it to work with date-fns.

Capability set01 / 01

01-02

2 capabilities in this set.

Part of 2 available through date-fns.

  1. 01

    Is business day

    Pass the date as an ISO string (YYYY-MM-DD). The engine accounts for all Brazilian national holidays and weekends. Checks if a given date is a Brazilian business day (excludes weekends and BR national holidays)

  2. 02

    Add business days

    Pass a starting date and the number of days to add (use negative values to subtract). The engine skips weekends and Brazilian holidays automatically. Adds or subtracts X Brazilian business days from a given date

Observed, not estimated

835ms average. Fast in production.

date-fns is checked daily against the live service.

Daily averagePeak 1109ms
Aug 20Today
Fastest day
672ms
Slowest day
1109ms
14-day trend
Slowing+40%

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 date-fns, so you can see the experience inside your AI.

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

date-fns Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_4BxpophtC9ipMVdNkVy8jC6qOkXy5wQSxKL8OU7o/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 — date-fns capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "br-business-days-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_4BxpophtC9ipMVdNkVy8jC6qOkXy5wQSxKL8OU7o/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

FAQ

Questions date-fns owners ask.

  • 01

    Does it require an external API?

    No! It uses a statically compiled list of Brazilian national holidays.

  • 02

    Does it skip weekends automatically?

    Yes, Saturdays and Sundays are ignored.

  • 03

    Are Carnival and Easter supported?

    Yes, the dynamic dates for these holidays are embedded.

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