Cursor

Add this to ~/.cursor/mcp.json (create the file if it doesn't exist), with your API key:

{
  "mcpServers": {
    "costcrunch": {
      "command": "uvx",
      "args": ["--from", "costcrunch", "cost", "mcp"],
      "env": { "COSTCRUNCH_API_KEY": "cc_live_..." }
    }
  }
}

Restart Cursor, then check Settings → MCP: CostCrunch should be listed with its tools. To use it in only one project, put the same file at .cursor/mcp.json in that project instead, and keep it out of version control.