How to Use the BR Business Days Calculator MCP in Claude

Get accurate Brazilian SLA dates directly in Claude Desktop without letting your AI client hallucinate calendar math.

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Connect BR Business Days Calculator MCP to Claude Desktop

Create your Vinkius account to connect BR Business Days Calculator to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup BR Business Days Calculator with Claude Desktop

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Stop Claude Desktop from guessing Brazilian SLAs

The `add_business_days` tool stops your AI client from hallucinating Brazilian holiday schedules when calculating deadlines. It takes a starting date and an integer to add or subtract days, skipping weekends and Brazilian national holidays automatically. When you ask Claude Desktop to set a payment deadline, the app invokes this tool to get the exact calendar date. You avoid manual calendar checks and legal penalties from incorrect SLA calculations.

Verify Brazilian banking dates instantly

The `is_business_day` tool checks any ISO-formatted date string to determine if Brazilian banks and businesses are open. It compares your input against the official Brazilian national holiday calendar and weekend rules. Your AI client uses this tool to flag potential transaction failures before they happen. If a user inputs a date that falls on a holiday in São Paulo, Claude Desktop catches the error immediately.

Local calendar calculations via this MCP Server

This MCP Server runs locally on your machine, giving Claude Desktop direct access to the date engine via stdio transport. You don't have to configure complex external API integrations or write custom date-parsing scripts. Simply add the configuration to your local JSON file and Claude Desktop handles the rest. The model queries the local engine whenever Brazilian business operations require calendar validation.

Setup guide

Set up BR Business Days Calculator MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The BR Business Days Calculator MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the BR Business Days Calculator MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under br-business-days-calculator-mcp.

json

{
  "mcpServers": {
    "br-business-days-calculator-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by date-fns. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about BR Business Days Calculator MCP in Claude Desktop

Open your developer configuration file and add the MCP server to your local config list. Once you save and restart Claude Desktop, the model accesses the tools automatically.

Yes. The local MCP server executes calculations on your machine, meaning Claude Desktop can verify Brazilian holidays even when you are offline.

Large language models struggle with calendar math and frequently miss regional Brazilian holidays. This tool provides deterministic responses, ensuring Claude Desktop never guesses a deadline.

No. The engine focuses strictly on Brazilian national holidays and weekends to maintain accurate federal business day calculations.

Your dates and ISO strings never leave your local machine during calculation. The server processes all calendar operations locally, ensuring sensitive project timelines remain completely private.

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