How to Use the FIRE Calculator MCP in Claude Code

Q: How do I update the FIRE Calculator settings in Claude Code?

Your configuration lives in /.claude.json. You can edit the file directly to change your MCP transport or scope parameters.

Run financial independence projections straight from your terminal using Claude Code and standard shell commands.

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Connect FIRE Calculator MCP to Claude Code

Create your Vinkius account to connect FIRE Calculator to Claude Code — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup FIRE Calculator with Claude Code

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Headless projections in Claude Code

Calculating your retirement timeline works perfectly in a headless environment. Terminal users do not need a graphical interface to plan their financial independence. You can pipe your financial data straight into your CLI. This MCP lets your agent run `calculate_milestones` without leaving the command line. You get raw text output that you can dump into a log file or a database.

Scripting your savings rate

Automation is the best way to track your progress. You can set up a cron job to check your timeline every month. Claude Code triggers `simulate_contribution_impact` to adjust your exit date based on your latest paycheck. The math executes silently in the background.

Defining terminal-based targets

Knowing your exact exit number is the only way to quit working. The math has to be precise and repeatable. By calling `get_lifestyle_targets` through the MCP, your script figures out exactly how much capital you need for your target monthly spend. It is fast, accurate, and completely headless.

Setup guide

Set up FIRE Calculator MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see fire-calculator-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest FIRE Calculator transactions." It will automatically discover and invoke the available FIRE Calculator tools.

Terminal

claude mcp add --transport http fire-calculator-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the FIRE Calculator MCP

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

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "fire-calculator-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

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