tilwhen date engine

com.tilwhen/tilwhenVersion 1.0.1

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

Status

Responds185 msNov 14, 2026, 14:19 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:19 UTC
Latency: 185 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://mcp.tilwhen.com/mcpResponds185 msNov 14, 2026, 14:19 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: tilwhen
Remote MCP server URL: https://mcp.tilwhen.com/mcp

Cursor

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

VS Code

code --add-mcp '{"name":"tilwhen","type":"http","url":"https://mcp.tilwhen.com/mcp"}'

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Tools

9 tools

Tools of tilwhen date engine
	Description		Read-only	Idempotent	Open world
`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 the gap between two dates use days_between.	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 the gap between two dates use days_between.	No	Yes	Yes	No
`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 days away. Passing from or to selects span mode and needs both; days and date are then ignored, so add mode takes its start date in date, not from. Optional holiday jurisdiction or custom calendar, and a selectable working week. For calendar days use add_days, subtract_days or days_between.	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 days away. Passing from or to selects span mode and needs both; days and date are then ignored, so add mode takes its start date in date, not from. Optional holiday jurisdiction or custom calendar, and a selectable working week. For calendar days use add_days, subtract_days or days_between.	No	Yes	Yes	No
`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 exclusive, so this is the gap and consecutive dates are 1 apart. Either date may be "today", resolved in tz. For working days between two dates use business_days; to move a date by N days use add_days or subtract_days.	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 exclusive, so this is the gap and consecutive dates are 1 apart. Either date may be "today", resolved in tz. For working days between two dates use business_days; to move a date by N days use add_days or subtract_days.	No	Yes	Yes	No
`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 user asks how an answer was reached.	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 user asks how an answer was reached.	No	Yes	Yes	No
`holidays`Observed public holidays with the nominal (legal) date and status: rule (statutory) or declared (officially declared for that year). Declared-only holidays are omitted for undeclared years, with a holiday_data_incomplete warning.	Observed public holidays with the nominal (legal) date and status: rule (statutory) or declared (officially declared for that year). Declared-only holidays are omitted for undeclared years, with a holiday_data_incomplete warning.	No	Yes	Yes	No
`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 holidays.	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 holidays.	No	Yes	Yes	No
`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). Provide exactly one of event/weekday.	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). Provide exactly one of event/weekday.	No	Yes	Yes	No
`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 (03/04/2027) return needsClarification instead of a guess.	Parses queries like "90 business days from today in uganda" into a normalized operation, answers it, and returns the auditable receipt. Ambiguous dates (03/04/2027) return needsClarification instead of a guess.	No	Yes	Yes	No
`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 the gap between two dates use days_between.	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 the gap between two dates use days_between.	No	Yes	Yes	No

Details

Registry status: Active
Published: Sep 18, 2026
Updated: Sep 18, 2026
Website: https://tilwhen.com/mcp⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Invoicing and accountingSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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