Tilwhen MCP MCP server

An official MCP server providing deterministic date arithmetic with auditable receipts. It handles business days, due dates, holidays, and countdowns using the same engine as the tilwhen.com REST API, ensuring verifiable and consistent results for AI clients without requiring installation or API keys.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Tilwhen

MCP endpoint (Streamable HTTP)

https://mcp.tilwhen.com/mcp

Vendor documentation

What you can do with it

Calculate business days between two dates excluding specific holiday jurisdictions
Determine invoice due dates based on Net-N payment terms and roll-forward rules
Find the next occurrence of a specific weekday or tracked event after a base date
Parse natural language date queries into normalized operations with auditable receipts

Tools advertised by the last live check:

parse_date_query
add_days
subtract_days
days_between
business_days
invoice_due
next_occurrence
holidays
explain

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http tilwhen-mcp https://mcp.tilwhen.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add tilwhen-mcp --url https://mcp.tilwhen.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable tilwhen-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "tilwhen-mcp": {
      "url": "https://mcp.tilwhen.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "tilwhen-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.tilwhen.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start tilwhen-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "tilwhen-mcp": {
      "type": "http",
      "url": "https://mcp.tilwhen.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http tilwhen-mcp https://mcp.tilwhen.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "tilwhen-mcp": {
      "url": "https://mcp.tilwhen.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "tilwhen-mcp": {
      "serverUrl": "https://mcp.tilwhen.com/mcp"
    }
  }
}

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