How to Use the Legal Deadline Calculator Engine MCP in Claude

Q: How do I install the Legal Deadline Calculator Engine in Claude Desktop?

Open your claudedesktopconfig.json file and add the MCP Server configuration under your mcpServers list. Save the file and restart the desktop app to see the tool icon in your chat window.

Q: Can the Legal Deadline Calculator Engine on Claude Desktop handle state-specific holidays?

Yes. You pass custom holiday lists into the calculatelegaldeadline tool during the call. Your agent can pull these lists from your files and feed them directly to the engine.

Run the Legal Deadline Calculator Engine directly in Claude Desktop to compute court dates with zero math errors.

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Connect Legal Deadline Calculator Engine MCP to Claude Desktop

Create your Vinkius account to connect Legal Deadline Calculator Engine 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 Legal Deadline Calculator Engine with Claude Desktop

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Stop LLM date math hallucinations in Claude Desktop

The `calculate_legal_deadline` tool calculates exact filing dates directly inside your chat. LLMs are notoriously bad at calendar math, often skipping leap years or miscounting weekends. This tool offloads the math to a deterministic engine, giving your agent the exact calendar date. You get the exact date back in ISO format. No more manual calendar counting or hoping the model got the Friday after Thanksgiving right.

Exclude federal holidays with this MCP Server

The `calculate_legal_deadline` tool lets you pass custom holiday lists to skip legal holidays during calculation. It automatically handles standard federal holidays, skipping Saturdays and Sundays without manual prompting. When you ask your agent to calculate a filing window, it calls this MCP Server in the background. The server handles the rollover logic, ensuring a deadline landing on a Sunday rolls to the next business day.

Local execution via Claude Desktop config

The `calculate_legal_deadline` tool runs locally as a subprocess on your machine. You configure the server in your local `claude_desktop_config.json` file, giving your agent immediate access to the calculation engine. This local setup keeps your case dates on your machine. The agent queries the tool over stdio, pulling back calculated dates without sending sensitive litigation details to external APIs.

Setup guide

Set up Legal Deadline Calculator Engine 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 Legal Deadline Calculator Engine 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 Legal Deadline Calculator Engine 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 legal-deadline-calculator-engine-mcp.

json

{
  "mcpServers": {
    "legal-deadline-calculator-engine-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Common questions about Legal Deadline Calculator Engine MCP in Claude Desktop

Open your `claude_desktop_config.json` file and add the MCP Server configuration under your `mcpServers` list. Save the file and restart the desktop app to see the tool icon in your chat window.

Yes. You pass custom holiday lists into the `calculate_legal_deadline` tool during the call. Your agent can pull these lists from your files and feed them directly to the engine.

LLMs cannot do calendar math reliably. They hallucinate holiday dates and fail at counting business days over weekend boundaries. This server uses deterministic code to guarantee 100% mathematical accuracy.

Yes. The tool handles negative offsets to calculate dates prior to a trial or hearing. It applies the same weekend and holiday exclusion rules in reverse.

This MCP Server only processes the start date, day offset, and holiday list parameters. No case names, client names, or sensitive docket information are ever sent to or processed by the tool.

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