Travel Per Diem & Allowance Calculator
REMOTE · SYNTROPICAPI.COM · SCANNED SEP 27
Compliant per diems in one call: official US GSA, German BMF and UK HMRC rates, with a trip…
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token. See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability65
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 808 tokens (~202/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Unverified: 1 category
A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
How do I install the Travel Per Diem & Allowance Calculator MCP server?
Travel Per Diem & Allowance Calculator is a hosted endpoint at https://syntropicapi.com/mcp/travel-per-diem/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · syntropicapi.com
claude mcp add --transport http com-syntropicapi-travel-per-diem 'https://syntropicapi.com/mcp/travel-per-diem/mcp'
{
"mcpServers": {
"com-syntropicapi-travel-per-diem": {
"url": "https://syntropicapi.com/mcp/travel-per-diem/mcp"
}
}
} {
"servers": {
"com-syntropicapi-travel-per-diem": {
"type": "http",
"url": "https://syntropicapi.com/mcp/travel-per-diem/mcp"
}
}
} [mcp_servers.com-syntropicapi-travel-per-diem] url = "https://syntropicapi.com/mcp/travel-per-diem/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-syntropicapi-travel-per-diem": {
"type": "remote",
"url": "https://syntropicapi.com/mcp/travel-per-diem/mcp",
"enabled": true
}
}
} openclaw mcp add com-syntropicapi-travel-per-diem --url 'https://syntropicapi.com/mcp/travel-per-diem/mcp' --transport streamable-http
mcp_servers:
com-syntropicapi-travel-per-diem:
url: "https://syntropicapi.com/mcp/travel-per-diem/mcp" {
"McpServers": {
"com-syntropicapi-travel-per-diem": {
"Transport": "http",
"Url": "https://syntropicapi.com/mcp/travel-per-diem/mcp"
}
}
} assistant mcp add com-syntropicapi-travel-per-diem -t streamable-http -u 'https://syntropicapi.com/mcp/travel-per-diem/mcp'
{
"mcpServers": {
"com-syntropicapi-travel-per-diem": {
"type": "http",
"url": "https://syntropicapi.com/mcp/travel-per-diem/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 27 Sept 26 73
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 27 Sept 2026 · Probed https://syntropicapi.com/mcp/travel-per-diem/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=syntropicapi.com | CN=YE2,O=Let's Encrypt,C=US | 27 Sept 2026 | 26 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 6f7714a82314e13f7370846bdc26a4ab8d1 |
| SANs: syntropicapi.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of syntropicapi.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| syntropicapi.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Challenged, unverified
The endpoint asked for a token, but we could not retrieve and validate the RFC 9728 metadata that tells a client how to obtain one.
| Result | Challenged, unverified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
Protected resource metadata
| Retrieved | No |
|---|---|
| Problem | no_resource_metadata |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://syntropicapi.com/mcp/travel-per-diem/mcp | Verified | 200 | |
| http (plaintext) | http://syntropicapi.com/mcp/travel-per-diem/mcp | HTTPS enforced | 301 | https://syntropicapi.com/mcp/travel-per-diem/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
calculate_trip_allowance Calculate Trip Allowance ~390
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.
| Name | Type | Req | Description |
|---|---|---|---|
| leave_home | – | – | When the traveller leaves home / the first place of work (de-bmf, us-gsa). Default: first arrive |
| legs | array | yes | Destinations in chronological order (1-20) |
| lodging_provided | boolean | – | Lodging paid directly by the employer: no lodging lines |
| meals_provided | array | – | Meals provided by employer/host |
| overnight | boolean | – | False for a trip across midnight without an overnight stay (de-bmf/us-gsa: combine hours) |
| regime | string | yes | Which rule set to apply |
| return_home | – | – | When the traveller is back home. Default: last depart |
| Name | Type | Req | Description |
|---|---|---|---|
| currency | – | yes | Currency of total, if the trip has a single currency |
| days | integer | yes | Calendar days touched by the trip |
| deductions_total | – | yes | Meal deductions, negative (single-currency trips, else null) |
| disclaimer | string | yes | Informational use only, not tax advice |
| lines | array | yes | One line per day/period, deduction and night, each with its rule |
| lodging_total | – | yes | Lodging total (single-currency trips, else null) |
| meals_total | – | yes | Meal allowances before deductions (single-currency trips, else null) |
| notes | array | yes | Assumptions and caveats that applied |
| regime | string | yes | Regime applied |
| sources | array | yes | Official publications used |
| total | – | yes | Grand total (null if several currencies are involved; see totals) |
| totals | array | yes | Totals per currency |
No examples provided.
get_per_diem_rates Get Per Diem Rates ~237
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).
| Name | Type | Req | Description |
|---|---|---|---|
| city | – | – | City; unlisted cities fall back per the regime's rules |
| country | – | – | ISO alpha-2 code or English/German name. Default: DE for de-bmf, US for us-gsa |
| date | – | – | Travel date (ISO 8601). Default: today (UTC) |
| postal_code | – | – | US ZIP (us-gsa) or French postcode (de-bmf) |
| regime | string | yes | de-bmf (Germany), us-gsa (US CONUS) or uk-hmrc (UK overseas scale rates) |
| state | – | – | US state code (us-gsa) |
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | yes | ISO 4217 currency of the summary fields |
| date | string | yes | Date the rate applies to |
| de_bmf | – | – | de-bmf breakdown (only for regime de-bmf) |
| disclaimer | string | yes | Informational use only, not tax advice |
| location | object | yes | The location that was resolved from the input |
| lodging | number | yes | Per-night lodging figure (BMF flat rate, GSA maximum, HMRC room rate) |
| meals_full_day | number | yes | Meals allowance for a full day (BMF 24 h rate, GSA M&IE, HMRC 24-hour rate) |
| meals_partial_day | number | yes | Reduced day (BMF arrival/departure/>8 h, GSA 75 % first/last day, HMRC over-10-hours) |
| notes | array | yes | Fallbacks and caveats that applied |
| other_locations | array | yes | Other listed locations in the same country for this regime |
| regime | string | yes | Regime the rate comes from |
| source | object | yes | Official publication the rate comes from |
| uk_hmrc | – | – | uk-hmrc breakdown (only for regime uk-hmrc) |
| us_gsa | – | – | us-gsa breakdown (only for regime us-gsa) |
No examples provided.
list_per_diem_regimes List Per Diem Regimes ~44
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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| disclaimer | string | yes | Informational use only, not tax advice |
| regimes | array | yes | All regimes, available and planned |
No examples provided.
search_per_diem_locations Search Per Diem Locations ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| country | – | – | Only this country (ISO alpha-2 or name) |
| limit | integer | – | Maximum items to return |
| offset | integer | – | Items to skip |
| q | – | – | Case- and accent-insensitive text search over city, country, state, county and aliases |
| regime | string | yes | Regime to search |
| state | – | – | Only this US state (us-gsa) |
| Name | Type | Req | Description |
|---|---|---|---|
| items | array | yes | Matching locations (after limit/offset) |
| regime | string | yes | Regime searched |
| total | integer | yes | Number of matching locations before limit/offset |
No examples provided.
What is the Travel Per Diem & Allowance Calculator MCP server?
Travel Per Diem & Allowance Calculator is an MCP server listed in the public MCP registry as com.syntropicapi/travel-per-diem. Compliant per diems in one call: official US GSA, German BMF and UK HMRC rates, with a trip… This page covers its hosted endpoint (https://syntropicapi.com/mcp/travel-per-diem/mcp).
Is the Travel Per Diem & Allowance Calculator MCP server safe to use?
Travel Per Diem & Allowance Calculator scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Travel Per Diem & Allowance Calculator MCP server expose?
Travel Per Diem & Allowance Calculator exposes 4 tools: get_per_diem_rates, calculate_trip_allowance, list_per_diem_regimes, search_per_diem_locations. Their descriptions and schemas cost roughly 808 tokens of context every time the server is loaded.
Does the Travel Per Diem & Allowance Calculator MCP server require authentication?
Yes. Travel Per Diem & Allowance Calculator asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Travel Per Diem & Allowance Calculator MCP server still maintained?
Travel Per Diem & Allowance Calculator is still listed as active in the MCP registry. We last reached this channel on 27 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.