How to Use the Deterministic Fair-Share Tip Splitter MCP in Claude Code

Q: How do I add the Deterministic Fair-Share Tip Splitter MCP Server to Claude Code?

You run the command claude mcp add --transport http deterministic-fair-share-tip-splitter -- in your terminal. This registers the splitbill tool for immediate headless execution.

Q: How are fractional penny remainders handled by the tool?

The splitbill tool applies a largest-remainder algorithm. Any leftover fractional pennies are assigned to the diner with the highest individual total, ensuring the final sum matches the receipt exactly.

Pipe receipt data to the Deterministic Fair-Share Tip Splitter MCP Server directly from your terminal using Claude Code.

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Connect Deterministic Fair-Share Tip Splitter MCP to Claude Code

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Setup Deterministic Fair-Share Tip Splitter with Claude Code

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Command-line bill splitting via Claude Code

The `split_bill` tool exposes high-precision bill splitting directly to your terminal environment. Claude Code can parse standard input or files containing receipt data, structure it, and execute the calculation in a single command. This headless execution is perfect for developers who want to process bill data without leaving the terminal. You can pipe raw text into Claude Code and get a structured, mathematically perfect breakdown.

Proportional tax distribution with zero math drift

The `split_bill` tool calculates tax and tip shares based on the exact ratio of each diner's items to the subtotal. Claude Code triggers this logic, ensuring that high-value orders bear their fair share of the tax burden. This approach prevents the social friction of flat-rate splits where low-spending diners overpay. The math engine enforces strict proportional fairness across all itemized inputs.

Deterministic penny resolution for terminal pipelines

The `split_bill` tool resolves fractional penny discrepancies using a deterministic algorithm, exposing this logic via the MCP Server. Claude Code handles this output, giving you a clean, terminal-friendly ledger that sums up perfectly to the receipt total. Because the rounding logic is entirely deterministic, it is highly reliable for automated script pipelines. You won't get unpredictable rounding variations that break automated accounting ledgers.

Setup guide

Set up Deterministic Fair-Share Tip Splitter 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 deterministic-fair-share-tip-splitter-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Deterministic Fair-Share Tip Splitter transactions." It will automatically discover and invoke the available Deterministic Fair-Share Tip Splitter tools.

Terminal

claude mcp add --transport http deterministic-fair-share-tip-splitter-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

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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 Deterministic Fair-Share Tip Splitter 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": {
    "deterministic-fair-share-tip-splitter-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

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Common questions about Deterministic Fair-Share Tip Splitter MCP in Claude Code

You run the command `claude mcp add --transport http deterministic-fair-share-tip-splitter -- ` in your terminal. This registers the `split_bill` tool for immediate headless execution.

Yes, you can pipe raw text files containing receipt data into Claude Code. The CLI agent will extract the items, format the JSON array, and call the `split_bill` tool to output the results.

Custom scripts often fail to handle fractional penny rounding and proportional tax distribution correctly. This server provides a tested, mathematically rigorous `split_bill` tool that Claude Code can invoke instantly.

The `split_bill` tool applies a largest-remainder algorithm. Any leftover fractional pennies are assigned to the diner with the highest individual total, ensuring the final sum matches the receipt exactly.

No, all item costs, tax amounts, and tip percentages are processed inside a secure, ephemeral V8 isolate sandbox managed by Vinkius. Your receipt data is never stored, logged, or transmitted externally.

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