Rail MCP Server

io.github.tstockham96/rail-mcp

Repository Registry

What is the Rail MCP server?

Budgets, propose-then-approve, and receipts for agents that buy for a human. Dry-run by default.

How to install Rail

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

RAIL_DATA_DIR
Directory for the local ledger (budget, proposals, receipts). Defaults to ~/.rail in the user home directory. Set to override.

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "rail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "rail-mcp"
      ],
      "env": {
        "RAIL_DATA_DIR": "<YOUR_RAIL_DATA_DIR>"
      }
    }
  }
}

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