usaspending-gov-mcp

MCP server for the USASpending.gov federal contract, award, subaward, recipient, agency, and federal account API.

No API key required. Works with any MCP-compatible client (Claude Desktop, Claude Code, Cursor, Cline, Continue, Zed, etc.).

Tested and hardened through ten rounds of integration testing against the live USASpending.gov API. 2,151 regression tests (1,783 offline, 368 live-gated); round 10 fixed 25 verified findings across both tool families, including filters that could never match and a tool that had never once succeeded. See testing.md for the full testing record.

What it does

Exposes the USASpending.gov REST API as 55 MCP tools covering:

Search and aggregation

• search_awards - Primary search for contracts, IDVs, grants, loans, direct payments
• get_award_count - Dimensional counts across award categories
• spending_over_time - Time series aggregation (fiscal year, quarter, month)
• spending_by_category - Top N breakdowns by agency, vendor, NAICS, PSC, state, etc.
• spending_by_transaction - Modification-level transaction search
• spending_by_geography - State, county, or congressional district breakdown
• new_awards_over_time - Pipeline trend for a recipient

Award detail

• get_award_detail - Full record for a single award
• get_transactions - Full modification history for an award
• get_award_funding - File C funding data (Treasury account, object class, program activity)
• get_award_funding_rollup - Single-line funding summary
• get_award_subaward_count, get_award_federal_account_count, get_award_transaction_count
• get_idv_children - Task/delivery orders under an IDV
• awards_last_updated - Data freshness check

Subawards (FFATA)

• search_subawards - Subawards under a single prime
• spending_by_subaward_grouped - Subaward search with full filter set

Recipients

• search_recipients - Search recipients by keyword
• get_recipient_profile - Full recipient record
• get_recipient_children - Subsidiaries of a parent recipient
• autocomplete_recipient - Find recipient hashes by partial name
• list_states - All states with FIPS codes

Agency depth

• list_toptier_agencies, get_agency_overview, get_agency_awards
• get_agency_budgetary_resources - Budget resources by FY
• get_agency_sub_agencies - Subordinate orgs with obligations
• get_agency_federal_accounts - Funding sources (TAS)
• get_agency_object_classes - Spending categories (OMB)
• get_agency_program_activities - Program-level breakdown
• get_agency_obligations_by_award_category - Contract vs grant mix

IDV depth

• get_idv_amounts - Top-line IDV rollup
• get_idv_funding, get_idv_funding_rollup - File C for IDV
• get_idv_activity - Child orders under an IDV

Federal accounts (Treasury)

• list_federal_accounts - Search TAS
• get_federal_account_detail, get_federal_account_object_classes, get_federal_account_program_activities, get_federal_account_fy_snapshot

Autocomplete

• autocomplete_psc, autocomplete_naics
• autocomplete_awarding_agency, autocomplete_funding_agency
• autocomplete_cfda (grants), autocomplete_glossary, autocomplete_recipient

Reference data

• get_naics_details, get_psc_filter_tree
• get_award_types_reference - All award type codes (A=BPA Call etc.)
• get_def_codes_reference - Disaster Emergency Fund codes (COVID, IIJA, IRA)
• get_glossary - Acquisition/spending vocabulary
• get_submission_periods - Agency reporting period coverage
• get_state_profile - State-level spending profile

Workflow convenience

• lookup_piid - Auto-detects contract vs IDV and returns the matching award

Installation

Via pip

pip install usaspending-gov-mcp

Via uvx (recommended, no venv needed)

uvx --from usaspending-gov-mcp usaspending-mcp

The --from is required for this server and only this server. The PyPI package is usaspending-gov-mcp but the console script it installs is usaspending-mcp, so a bare uvx usaspending-gov-mcp fails with "An executable named usaspending-gov-mcp is not provided by package usaspending-gov-mcp".

Do not run uvx usaspending-mcp either. usaspending-mcp is an unrelated third-party package on PyPI, not this project.

From source

git clone https://github.com/1102tools/federal-contracting-mcps.git
cd federal-contracting-mcps/servers/usaspending-gov-mcp
pip install -e .

Claude Desktop configuration

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "usaspending": {
      "command": "uvx",
      "args": ["--from", "usaspending-gov-mcp", "usaspending-mcp"]
    }
  }
}

If you installed via pip install -e . or a regular pip install:

{
  "mcpServers": {
    "usaspending": {
      "command": "python",
      "args": ["-m", "usaspending_gov_mcp.server"]
    }
  }
}

Restart Claude Desktop. The server should appear in the MCP tools panel.

Claude Code configuration

Add to ~/.claude.json or your project's .claude.json:

{
  "mcpServers": {
    "usaspending": {
      "command": "uvx",
      "args": ["--from", "usaspending-gov-mcp", "usaspending-mcp"]
    }
  }
}

Example prompts

Once configured, try:

• "Show me the top 10 NAVSEA contracts awarded in FY2025 by dollar value."
• "Find all software development contracts at NASA with sole-source justifications in the last year."
• "How much has Leidos received in federal awards since 2020? Group by fiscal year."
• "What are the top 15 recipients of HUBZone set-aside contracts at DoD?"
• "Pull the full modification history for PIID N00024-24-C-0085."
• "Compare FFP vs T&M award counts for IT services at Air Force in FY2024."

Design notes

• No authentication required. USASpending.gov is a free, public API.
• Award type groups cannot be mixed. The award_type parameter takes one of: contracts, idvs, grants, loans, direct_payments, other. Use separate calls for separate categories.
• Actionable error messages. Common API errors (422 mixed award types, 400 sort field missing, 400 empty keywords) are translated into guidance for the calling LLM.
• Sort field auto-handling. The USASpending API requires the sort field to appear in the fields array; this server adds it automatically.
• Sensible defaults. Search limits default to 25 (API max 100). Default fields cover the most common columns for each award category.
• Flat filter parameters. Most common filters are surfaced as named parameters (keywords, awarding_agency, naics_codes, etc.) rather than a nested filter dict, for better LLM tool discovery.

Data source

All data is sourced from USASpending.gov, which aggregates FPDS-NG contract data, FAADC assistance data, and agency DATA Act submissions. Data freshness varies by agency: non-DoD contract data is typically available within 5 business days, DoD and USACE procurement data has a 90-day reporting delay in FPDS, and financial assistance data is available within 2 days of submission.

License

MIT