Nonlinear Calendar MCP Server

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

claude mcp add balance-engine --transport http https://balance-engine.vercel.app/api/mcp

{
  "mcpServers": {
    "balance-engine": {
      "url": "https://balance-engine.vercel.app/api/mcp"
    }
  }
}

[mcp_servers.balance-engine]
url = "https://balance-engine.vercel.app/api/mcp"

{
  "mcpServers": {
    "balance-engine": {
      "url": "https://balance-engine.vercel.app/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "balance-engine": {
      "url": "https://balance-engine.vercel.app/api/mcp"
    }
  }
}

This one needs environment variables set before it will start: BALANCE_API_KEY (Account key from join.html (be_…) for your personal timetable. Leave empty for free tools (today/body/adjust/month/fold/sky/almanac/solar-terms). Empty key cannot call personal_day / personal_month.), BALANCE_ENGINE_API_BASE (Optional API origin. Default https://balance-engine.vercel.app). The author declared them in the registry entry; get the values from the project itself.

Available tools 12

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

Endpoints