generated: '2026-09-12'
method: searched
source: >-
  https://github.com/GSA-TTS/mcp-server-gsa-perdiem,
  https://github.com/GSA-TTS/mcp-server-regulations-gov and the GSA MCP Server
  Hub catalog at https://github.com/GSA-TTS/mcp-server-hub-catalog
description: >-
  GSA's Technology Transformation Services (GSA-TTS) is one of the few federal
  publishers shipping MCP servers, and two of them wrap GSA's OWN APIs: the GSA
  Per Diem API and the Regulations.gov API. Both are real, first-party code with
  named tools. Neither is reachable as a public remote endpoint: the per diem
  server runs over stdio from a cloned repository, and the Regulations.gov
  server is a container image that the GSA-managed obot MCP gateway hosts
  per-user behind that gateway, with no published public URL. GSA-TTS also runs
  a broader hub catalog and a federal-data registry, but the remaining ~28
  servers there wrap OTHER agencies' APIs (NIH, CDC, EPA, FEMA, Census, BLM,
  NOAA) and are not GSA API surfaces.
deployment:
  mode: local-stdio
  endpoint: null
  install: 'uv run --directory /path/to/mcp-server-gsa-perdiem python main.py'
  package: https://github.com/GSA-TTS/mcp-server-gsa-perdiem
  auth: api-key
  verified: searched
  note: >-
    mode is local-stdio, not remote. mcp-server-gsa-perdiem calls
    mcp.run(transport="stdio") unless a PORT/DATABRICKS_APP_PORT env var is set
    (src/perdiem/app.py). mcp-server-regulations-gov is containerized
    (ghcr.io/gsa-tts/mcp-server-regulations-gov:0.2.0, port 8080, path /mcp,
    health /health) but the hub catalog publishes no public gateway URL, and the
    catalog README states these servers are pilots / proofs of concept and not
    intended for production use. No endpoint URL is recorded because none is
    published; guessing one would read as a verified agent surface.
servers:
  - name: GSA Per Diem MCP
    status: published
    api: general-services-administration:per-diem-api
    repo: https://github.com/GSA-TTS/mcp-server-gsa-perdiem
    transport: stdio
    runtime: python >=3.13 (fastmcp >=3.3.1)
    auth:
      type: api-key
      env: PERDIEM_API_KEY
      obtain: https://api.data.gov/signup/
    server_name: perdiem_mcp
    tools:
      - name: perdiem_get_rates_by_city
        description: Per diem rates for a known city + state + fiscal year.
      - name: perdiem_get_rates_by_zip
        description: Per diem rates when only a ZIP code is known.
      - name: perdiem_get_rates_by_state
        description: Browse or compare destinations within a state for a fiscal year.
      - name: perdiem_get_mie_rates
        description: M&IE meal/incidental breakdown and the first/last-day (75%) rate.
      - name: perdiem_get_conus_lodging_rates
        description: The full CONUS lodging rate table, paginated.
      - name: perdiem_get_zip_code_mapping
        description: Which GSA destination a ZIP code belongs to.
    instructions_note: >-
      The server ships model instructions that encode GSA travel policy an
      OpenAPI cannot express: fiscal years run 1 Oct - 30 Sep; Non-Standard Area
      lodging rates are seasonal and must be reported per month, never averaged;
      only 75% of M&IE may be claimed on the first and last travel day;
      unlisted destinations fall back to the CONUS standard rate.
  - name: Regulations.gov MCP
    status: published
    api: general-services-administration:regulationsgov-api
    repo: https://github.com/GSA-TTS/mcp-server-regulations-gov
    transport: streamable-http (containerized, gateway-hosted)
    image: ghcr.io/gsa-tts/mcp-server-regulations-gov:0.2.0
    container:
      port: 8080
      path: /mcp
      health: /health
    hosted_by: GSA-managed obot MCP gateway (singleUser deployment)
    public_endpoint: null
    auth:
      type: api-key
      env: REGULATIONS_GOV_API_KEY
      obtain: https://api.data.gov/signup/
    tools:
      - name: regulations_search_documents
        description: Search Rules, Proposed Rules, Notices by keyword, agency, date range, docket.
      - name: regulations_get_document
        description: Full metadata for a specific document.
      - name: regulations_search_comments
        description: Search public comments by keyword, agency, docket, or document.
      - name: regulations_get_comment
        description: Full text and metadata for a specific comment.
      - name: regulations_search_dockets
        description: Search dockets by keyword, agency, type.
      - name: regulations_get_docket
        description: Full metadata for a specific docket.
    rate_limit_note: >-
      Comment endpoints are limited to 50 requests/minute and 500 requests/hour;
      a sequential query returns at most 5,000 results.
related_gsa_programs:
  - name: GSA MCP Server Hub catalog
    url: https://github.com/GSA-TTS/mcp-server-hub-catalog
    description: >-
      Catalog read by the GSA-managed obot MCP gateway; 29 pilot servers, of
      which only Regulations.gov wraps a GSA-operated API.
  - name: Federal open-data MCP registry
    url: https://github.com/GSA-TTS/fed-data-mcp-registry
    description: >-
      Curated registry of MCP servers over federal open data. Lists one GSA
      entry (USA Analytics / analytics.usa.gov, GSA-TTS/usdc-arc-mcp-demo) with
      no remote URL.
  - name: MCP Server and AI Agent Government Hackathon
    url: https://www.gsa.gov/artificial-intelligence/ai-community-of-practice/events-and-training/2026-ai-hackathon
    description: GSA's 2026 program soliciting MCP servers for agency open data and service delivery.