# GSA Per Diem (pypi · gsa-perdiem-mcp)

GSA Per Diem access readiness, lodging, and meals and incidental expense rates. 7 tools.

- Trust score: 80/100 (high trust)
- Change this week: +18
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- pypi · `gsa-perdiem-mcp`: 80/100 (this document), [markdown](https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp.md), [page](https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp)

## Channel facts

- Registry: `pypi`
- Package: `gsa-perdiem-mcp`
- Version: `1.0.10`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised native-build step with no shell scripting around it.
  - 1 of 34 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 7 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 986 tokens (~140/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 90/100
  - Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 71/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the GSA Per Diem MCP server?

GSA Per Diem runs locally as a PyPI package, launched with uvx gsa-perdiem-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add com-1102tools-gsa-perdiem-mcp -- uvx gsa-perdiem-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "com-1102tools-gsa-perdiem-mcp": {
      "command": "uvx",
      "args": [
        "gsa-perdiem-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-1102tools-gsa-perdiem-mcp": {
      "command": "uvx",
      "args": [
        "gsa-perdiem-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add com-1102tools-gsa-perdiem-mcp -- uvx gsa-perdiem-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-1102tools-gsa-perdiem-mcp": {
      "type": "local",
      "command": [
        "uvx",
        "gsa-perdiem-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-1102tools-gsa-perdiem-mcp --command uvx --arg gsa-perdiem-mcp
```

### Hermes

```yaml
mcp_servers:
  com-1102tools-gsa-perdiem-mcp:
    command: "uvx"
    args: ["gsa-perdiem-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "com-1102tools-gsa-perdiem-mcp": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "gsa-perdiem-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-1102tools-gsa-perdiem-mcp -t stdio -c uvx -a gsa-perdiem-mcp
```

### Other

```json
{
  "mcpServers": {
    "com-1102tools-gsa-perdiem-mcp": {
      "command": "uvx",
      "args": [
        "gsa-perdiem-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-19 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 78, +16)

- [security improvement] Malware scan: unverified → pass

### 2026-09-13 (score 62, −14)

- [security regression] Malware scan: pass → unverified
- [functional] Package version: 1.0.9 → 1.0.10

### 2026-09-11 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-04 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (7)

### `get_access_status` (~22 tokens)

Check Per Diem credential presence without returning or validating its value.

### `lookup_city_perdiem` (~313 tokens)

Look up federal per diem rates for a city and state.

Returns lodging rates (monthly breakdown for seasonal locations) and
M&IE (meals and incidental expenses) for the specified fiscal year.

state: 2-letter USPS code (e.g., 'DC', 'VA', 'MD', 'CA').
fiscal_year: defaults to current FY. FY runs Oct 1 - Sep 30, so
FY2026 = 2025-10-01 through 2026-09-30.

The city endpoint resolves cities to their county's rate area
server-side, so the matched NSA name can legitimately differ from the
query (Washington -> 'District of Columbia', Penasco -> 'Taos').
Selection order:
1\. Exact city name match
2\. Composite NSA name containing the city (e.g., 'Boston' matches 'Boston / Cambridge')
3\. API-resolved rate area (no Standard Rate row in the response)
4\. Standard Rate fallback (query fell through to the state default)

Apostrophes, hyphens, and slashes in city names are auto-replaced with
spaces (GSA API quirk). Keep periods for 'St.' prefix cities (St. Louis).

For DC: query city='Washington', state='DC'.
CONUS only: AK, HI, and territories return a pointer to DoD/State rates.

Input parameters:

- `city` (string, required)
- `fiscal_year`
- `state` (string, required)

### `lookup_zip_perdiem` (~101 tokens)

Look up federal per diem rates by ZIP code.

May return multiple entries (NSA + standard rate). This tool auto-selects
the NSA rate over the standard rate.

Useful when the exact city name is uncertain but the ZIP is known.
Accepts 5-digit ZIPs or ZIP+4 (e.g., '02101' or '02101-1234').

Input parameters:

- `fiscal_year`
- `zip_code` (string, required)

### `lookup_state_rates` (~113 tokens)

Get all Non-Standard Area (NSA) per diem rates for a state.

Returns every city/county with rates above the standard rate in that
state. Useful for comparing rates across cities within a state or for
building a travel IGCE with multiple destinations.

CONUS only: AK, HI, and territories return a pointer to DoD/State rates
instead of an empty list that would falsely imply the standard CONUS
rate applies there.

Input parameters:

- `fiscal_year`
- `state` (string, required)

### `get_mie_breakdown` (~100 tokens)

Get the M&IE (meals and incidental expenses) tier breakdown table.

Returns all M&IE tiers with breakfast, lunch, dinner, incidental, and
first/last day (75%) amounts. Use this to show the meal component
breakdown when presenting per diem estimates.

M&IE does NOT vary seasonally (unlike lodging). The tier is set per
location and applies year-round.

Input parameters:

- `fiscal_year`

### `estimate_travel_cost` (~211 tokens)

Estimate total per diem cost for a trip.

Calculates lodging + M&IE for the specified number of nights.
First and last travel days use 75% M&IE per 41 CFR 301-11.101.

travel_month: 3-letter abbreviation (Jan, Feb, ..., Dec). If omitted,
uses the max monthly lodging rate (conservative estimate for IGCE).

Does NOT include airfare or ground transportation. Add those separately.

Formula:
\- Lodging = nightly_rate * num_nights
\- M&IE = full_day_rate * (travel_days - 2) + first/last_day_rate * 2
\- Travel days = num_nights + 1

num_nights bounded 1-365. A single trip longer than a year is
unlikely to be covered by per diem.

Input parameters:

- `city` (string, required)
- `fiscal_year`
- `num_nights` (integer, required)
- `state` (string, required)
- `travel_month`

### `compare_locations` (~90 tokens)

Compare per diem rates across multiple locations.

locations: list of {"city": "...", "state": "XX"} dicts, max 25 entries
(DEMO_KEY limits you to ~10 req/hr so this is generous). Returns rates
sorted by max daily total (highest first).

Useful for travel IGCE development when comparing destination costs.

Input parameters:

- `fiscal_year`
- `locations` (array, required)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp#diagnostics

## Score history

- 2026-09-20: 80
- 2026-09-19: 80
- 2026-09-18: 79
- 2026-09-17: 79
- 2026-09-16: 78
- 2026-09-15: 78
- 2026-09-14: 62
- 2026-09-13: 62
- 2026-09-12: 76
- 2026-09-11: 76
- 2026-09-10: 75
- 2026-09-09: 75
- 2026-09-08: 74
- 2026-09-07: 74
- 2026-09-06: 73
- 2026-09-05: 73
- 2026-09-04: 73
- 2026-09-03: 72
- 2026-09-02: 72
- 2026-09-01: 71
- 2026-08-31: 71
- 2026-08-30: 70
- 2026-08-29: 70
- 2026-08-28: 69
- 2026-08-27: 54
- 2026-08-26: 67
- 2026-08-25: 65
- 2026-08-24: 50

## Common questions

### What is the GSA Per Diem MCP server?

GSA Per Diem is an MCP server listed in the public MCP registry as com.1102tools/gsa-perdiem-mcp. GSA Per Diem access readiness, lodging, and meals and incidental expense rates. 7 tools. This page covers its PyPI package (gsa-perdiem-mcp).

### Is the GSA Per Diem MCP server safe to use?

GSA Per Diem scores 80 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. 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 GSA Per Diem MCP server expose?

GSA Per Diem exposes 7 tools: get_access_status, lookup_city_perdiem, lookup_zip_perdiem, lookup_state_rates, get_mie_breakdown, and 2 more. Their descriptions and schemas cost roughly 950 tokens of context every time the server is loaded.

### Is the GSA Per Diem MCP server still maintained?

GSA Per Diem is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the GSA Per Diem MCP server under?

GSA Per Diem declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/gsa-perdiem-mcp/
- Socket report: https://socket.dev/pypi/package/gsa-perdiem-mcp
- Repository: https://github.com/1102tools-dev/federal-contracting-mcps
- Website: https://1102tools.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-1102tools-gsa-perdiem-mcp/gsa-perdiem-mcp