# Travel Per Diem & Allowance Calculator

> Compliant per diems in one call: official US GSA, German BMF and UK HMRC rates, with a trip…

- name: com.syntropicapi/travel-per-diem
- version: 1.0.0
- connection class: R1 (autonomous)
- trust: 53/100 flags: no-repository, unreachable
- quality: 87/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.syntropicapi%2Ftravel-per-diem
- tools: https://api.protogrid.dev/v1/servers/com.syntropicapi%2Ftravel-per-diem/tools

**An agent can connect on its own if it already holds `X_API_KEY`, `X_API_KEY`.** Remote endpoint behind a static API key or header. The registry never sees the value; the agent fills the placeholder.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "travel-per-diem": {
      "type": "http",
      "url": "https://syntropicapi.com/mcp/travel-per-diem/mcp",
      "headers": {
        "X-API-Key": "${X_API_KEY}",
        "Authorization": "${X_API_KEY}"
      }
    }
  }
}
```

Placeholders to fill: `${X_API_KEY}`, `${X_API_KEY}`.

## Trust

- hygiene: 80
- liveness: 0
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website -unreachable(5 failures) +updated-23d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 87/100 (good)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 93 (weight 30)

- pass `tools.descriptions`: every tool has a description
- warn `tools.description_length`: 1 tools have descriptions over 1,024 characters, which crowds the context
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,859 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 75 (weight 15)

- warn `stability.changes`: 7 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 1,859 tokens to load them all
- tool set hash: 58ed234e93dabcc651d0bc1e15f4fe55
- tools last changed: 2026-09-29T16:28:18.366Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.syntropicapi/travel-per-diem.svg)](https://protogrid.dev/servers/com.syntropicapi/travel-per-diem)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-09-29 `search_per_diem_locations` changed (inputSchema, outputSchema)
- 2026-09-29 `calculate_trip_allowance` changed (description, inputSchema, outputSchema)
  - before: 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. - 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.
  - after: 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.
- 2026-09-29 `get_per_diem_rates` changed (inputSchema, outputSchema)
- 2026-09-28 `search_per_diem_locations` changed (title, annotations)
- 2026-09-28 `list_per_diem_regimes` changed (title, annotations)
- 2026-09-28 `calculate_trip_allowance` changed (title, annotations)
- 2026-09-28 `get_per_diem_rates` changed (title, annotations)

Full history: https://api.protogrid.dev/v1/servers/com.syntropicapi%2Ftravel-per-diem/changes

## Remotes

- https://syntropicapi.com/mcp/travel-per-diem/mcp (streamable-http, auth api_key ${X_API_KEY}, reachable false, uptime30d 0.921875)

## Packages

_none_

## Tools (4)

- `calculate_trip_allowance`: 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.
- `get_per_diem_rates`: 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).
- `list_per_diem_regimes`: 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.
- `search_per_diem_locations`: 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.