Travel Per Diem & Allowance Calculator MCP Server

Returns the lodging and meal allowance for one location under one regime, with the regime's breakdown (BMF meal deductions, GSA M&IE breakdown and seasons, HMRC meal/room rates), fallbacks applied, source citation and data freshness. us-gsa picks the fiscal year by date (FY2026: 2025-10-01..2026-09-30, FY2027: 2026-10-01..2027-09-30).

Lists the available regimes with validity periods, snapshot dates, sources and the rules the trip calculator applies, plus regimes that are planned but not yet available.

Lists the locations with their own rate in a regime (us-gsa: current fiscal-year destinations), filtered by text, country or state. Use the returned country/city/state values in /rates and /trip.

Applies the regime's rules to an itinerary and returns one line per allowance, deduction and night, each with the rule it applied, plus totals. - de-bmf: >8 h one-day trips (last place of work), partial arrival/departure days, full days at the place reached before midnight, higher rate on a home stop-over day, 20 %/40 % meal deductions of that day's full-day rate (never below 0), Übernachtungspauschale per night. The three-month rule is not applied. - us-gsa: 75 % M&IE on first and last day, M&IE of the lodging location, last day at the last TDY location, 75 % for 12-24 h trips without lodging, full meal-amount deductions with an incidentals floor, max lodging per night by season. - us-state: the same FTR rules as us-gsa with State Dept foreign rates per post (country 'Other' and 'Other Foreign Localities' fallbacks) and the FTR Appendix B meal amounts. - uk-hmrc: 24-hour periods from arrival abroad, over-5/over-10-hour rates for the remainder, room rate per night, provided meals deducted at the HMRC meal rate of the location at 08:00 / 13:00 / 19:00 that day.