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Nonlinear Calendar

Official registry Productivity

Nonlinear Calendar: this year’s months fold onto the previous 12 years. No key to try.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http nonlinear-calendar 'https://balance-engine.vercel.app/api/mcp' --header 'Authorization: <Optional. Bearer be_… account key from join.html — only needed for personal_day / personal_month. Free tools work without it.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "nonlinear-calendar": {
            "type": "http",
            "url": "https://balance-engine.vercel.app/api/mcp",
            "headers": {
                "Authorization": "<Optional. Bearer be_… account key from join.html — only needed for personal_day / personal_month. Free tools work without it.>"
            }
        }
    }
}
NPM package balance-engine-mcp
Claude Code 
claude mcp add nonlinear-calendar -e 'BALANCE_API_KEY=<your balance_api_key>' -e 'BALANCE_ENGINE_API_BASE=<BALANCE_ENGINE_API_BASE>' -- npx -y balance-engine-mcp@0.2.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "nonlinear-calendar": {
            "command": "npx",
            "args": [
                "-y",
                "balance-engine-mcp@0.2.1"
            ],
            "env": {
                "BALANCE_API_KEY": "<your balance_api_key>",
                "BALANCE_ENGINE_API_BASE": "<BALANCE_ENGINE_API_BASE>"
            }
        }
    }
}

Environment variables

  • BALANCE_API_KEY secret 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

Frequently asked questions

What is Nonlinear Calendar?

Nonlinear Calendar: this year’s months fold onto the previous 12 years. No key to try.

How do I install Nonlinear Calendar?

It runs as a remote server. In Claude Code: claude mcp add --transport http nonlinear-calendar 'https://balance-engine.vercel.app/api/mcp' --header 'Authorization: <Optional. Bearer be_… account key from join.html — only needed for personal_day / personal_month. Free tools work without it.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Nonlinear Calendar need an API key?

Yes. It expects BALANCE_API_KEY, Authorization, which you set in its configuration.

Is Nonlinear Calendar open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Nonlinear Calendar?

It is published by singularitybpjade. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.