com.tilwhen/tilwhen

up checked 2026-11-11T01:38:35.901Z

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Publisher-provided title

tilwhen date engine

Publisher-provided description

Deterministic date arithmetic with auditable receipts: business days, due dates, holidays.

Summary by lookupd

Computes calendar and business-day date arithmetic, due dates, and public holidays, returning auditable receipts with derivation steps.

Install

Claude Code, remote (streamable-http)

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

Codex, remote (streamable-http)

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

Cursor, remote (streamable-http) → .cursor/mcp.json

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

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (9 tools)

Publisher-provided text

• parse_date_query Parses queries like "90 business days from today in uganda" into a normalized operation, answers it, and returns the auditable receipt. Ambiguous dates (03/04/2
• add_days The date N whole calendar days after a date (exclusive counting: the start date is day 0). Omit date for today in tz. For working days use business_days; for th
• subtract_days The date N whole calendar days before a date (exclusive counting: the start date is day 0). Omit date for today in tz. For working days use business_days; for t
• days_between Signed whole calendar days from the from date to the to date, midnight to midnight in tz: positive when to is later, negative when it is earlier. Endpoints are
• business_days Span mode (from+to): business days between two dates, exclusive of the start day, inclusive of the end day. Add mode (days, optional date): the date N business
• invoice_due Due date for Net-N payment terms (calendar days, invoice date = day 0). Optional roll-forward past weekends and, with a jurisdiction or custom calendar, public
• next_occurrence The next occurrence strictly after the base date (default today) of either a tracked event slug (e.g. "christmas") or a weekday (0 = Sunday .. 6 = Saturday). Pr
• holidays Observed public holidays with the nominal (legal) date and status: rule (statutory) or declared (officially declared for that year). Declared-only holidays are
• explain Runs any operation and returns the receipt plus human-readable derivation steps. Set op, then pass the fields that operation's own tool takes. Use it when the u

Details

• Version: 1.0.1
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 501 ms
• First indexed: 2026-11-01T08:59:23.370Z
• Last seen in registry: 2026-11-01T08:59:23.381Z
• Website: https://tilwhen.com/mcp

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• Last crawl: 2026-11-11T16:39:06.253Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp