Travel Per Diem & Allowance Calculator

Server Details

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

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Status: Unhealthy
Uptime: 0.0% over the last 24 hours
Last Tested: 2026-11-09 15:58
Transport: Streamable HTTP
URL
ChatGPT: –
Claude: –

TDQS

A3.5/5.0

Scored 2026-09-29 14:00 across 4 tools

Disambiguation3/5

The four core tools (calculate_trip_allowance, get_per_diem_rates, list_per_diem_regimes, search_per_diem_locations) have distinct purposes, but the regime entries (de-bmf, us-gsa, us-state, uk-hmrc) read like overlapping ways to produce the same allowance output as calculate_trip_allowance, so it is unclear when to call a regime tool versus the general calculator.

Naming Consistency2/5

Core tools follow a clean snake_case verb_noun pattern, but the regime tools use kebab-case codes (de-bmf, us-gsa, us-state, uk-hmrc) that are neither verb_noun nor the same convention, producing a mixed naming scheme across the set.

Tool Count4/5

A count of 4 core tools is well-scoped for a rate/allowance calculator, with each tool earning its place (compute, look up rates, list regimes, search locations); if the regime entries are separate tools the set is still within a reasonable range.

Completeness4/5

The surface covers the key lifecycle: searching locations, listing regimes, fetching rates, and computing trip allowances with fallbacks and freshness. Minor gaps exist (e.g., no batching or explicit error/reconciliation tooling), but core workflows are covered.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

3 tool updatesSep 29, 2026

Changedcalculate_trip_allowance2 fields changed

changedInput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

changedOutput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

Changedget_per_diem_rates4 fields changed

changedInput schema / properties / regime / description

Previous value: -"de-bmf (Germany), us-gsa (US CONUS) or uk-hmrc (UK overseas scale rates)"New value: +"de-bmf (Germany), us-gsa (US CONUS), us-state (US State Dept foreign) or uk-hmrc (UK overseas scale rates)"

changedInput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

changedOutput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

addedOutput schema / properties / us_state

Added value: +{
+  "anyOf": [
+    {
+      "properties": {
+        "breakfast": {
+          "description": "M&IE breakdown (FTR ch. 301 Appendix B): breakfast",
+          "title": "Breakfast",
+          "type": "number"
+        },
+        "country_label": {
+          "description": "Country as named by the State Dept",
+          "title": "Country Label",
+          "type": "string"
+        },
+        "dinner": {
+          "description": "M&IE breakdown: dinner",
+          "title": "Dinner",
+          "type": "number"
+        },
+        "effective_from": {
+          "description": "Date the State Dept made this post's current rate effective",
+          "format": "date",
+          "title": "Effective From",
+          "type": "string"
+        },
+        "first_last_day": {
+          "description": "75 % of M&IE for the first and last day of travel",
+          "title": "First Last Day",
+          "type": "number"
+        },
+        "footnote_url": {
+          "description": "Where the footnotes are explained",
+          "title": "Footnote Url",
+          "type": "string"
+        },
+        "footnotes": {
+          "description": "State Dept footnote numbers for this post (see footnote_url)",
+          "items": {
+            "type": "integer"
+          },
+          "title": "Footnotes",
+          "type": "array"
+        },
+        "incidentals": {
+          "description": "M&IE breakdown: incidental expenses",
+          "title": "Incidentals",
+          "type": "number"
+        },
+        "lodging": {
+          "description": "Maximum lodging rate for the requested date (USD)",
+          "title": "Lodging",
+          "type": "integer"
+        },
+        "lunch": {
+          "description": "M&IE breakdown: lunch",
+          "title": "Lunch",
+          "type": "number"
+        },
+        "mie": {
+          "description": "Meals & incidental expenses rate per full day (USD)",
+          "title": "Mie",
+          "type": "integer"
+        },
+        "post": {
+          "description": "Post (location) as named by the State Dept; 'Other' = rest of the country",
+          "title": "Post",
+          "type": "string"
+        },
+        "seasons": {
+          "description": "Seasons of this post (a season may wrap the year end, e.g. 10-01..04-30)",
+          "items": {
+            "properties": {
+              "end": {
+                "description": "Season end as MM-DD",
+                "title": "End",
+                "type": "string"
+              },
+              "lodging": {
+                "description": "Maximum lodging rate per night (USD)",
+                "title": "Lodging",
+                "type": "integer"
+              },
+              "mie": {
+                "description": "M&IE rate per day (USD)",
+                "title": "Mie",
+                "type": "integer"
+              },
+              "start": {
+                "description": "Season start as MM-DD",
+                "title": "Start",
+                "type": "string"
+              }
+            },
+            "required": [
+              "start",
+              "end",
+              "lodging",
+              "mie"
+            ],
+            "title": "GsaSeason",
+            "type": "object"
+          },
+          "title": "Seasons",
+          "type": "array"
+        }
+      },
+      "required": [
+        "post",
+        "country_label",
+        "lodging",
+        "mie",
+        "breakfast",
+        "lunch",
+        "dinner",
+        "incidentals",
+        "first_last_day",
+        "seasons",
+        "effective_from",
+        "footnotes",
+        "footnote_url"
+      ],
+      "title": "StateDetail",
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "us-state breakdown (only for regime us-state)"
+}

Changedsearch_per_diem_locations4 fields changed

changedInput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

changedOutput schema / properties / items / items / properties / country / description

Previous value: -"ISO 3166-1 alpha-2"New value: +"ISO 3166-1 alpha-2 ('*' for the us-state 'Other Foreign Localities' rate)"

changedOutput schema / properties / items / items / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

changedOutput schema / properties / regime / enum

Previous value: -[
-  "de-bmf",
-  "us-gsa",
-  "uk-hmrc"
-]New value: +[
+  "de-bmf",
+  "us-gsa",
+  "us-state",
+  "uk-hmrc"
+]

4 tool updatesSep 27, 2026
- First observedcalculate_trip_allowance
- First observedget_per_diem_rates
- First observedlist_per_diem_regimes
- First observedsearch_per_diem_locations

Publisher details

Operator: Not applicable
Operator website: https://syntropicapi.com/apis/travel-per-diem · Publisher source
Vendor relationship: First-party
Documentation: https://syntropicapi.com/apis/travel-per-diem/docs · Publisher source
Trust center: Not applicable
Restrictions: Not applicable

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