Free, open-source MCP servers for federal contracting: SAM.gov, USAspending, GSA CALC+, eCFR, Federal Register, and more. 5,571 collected regression tests. In the Claude and ChatGPT directories.
Deterministic MCP access to Acquisition.gov FAR Overhaul model text, guidance, and posted agency deviations. Runs locally from the acquisition-gov-mcp Python package.
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MCP server for BLS Occupational Employment and Wage Statistics (OEWS) market wages for IGCEs and price analysis. Bundles the current release; no API key. Runs locally from the bls-oews-mcp Python package.
MCP server for the eCFR (Electronic Code of Federal Regulations) API. Read FAR, DFARS, and all agency FAR supplements. Runs locally from the ecfr-mcp Python package.
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MCP server for the Federal Register API. Proposed rules, final rules, notices, executive orders, and regulatory tracking. Runs locally from the federal-register-mcp Python package.
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MCP server for the GSA CALC+ Labor Ceiling Rates API. GSA MAS schedule rate benchmarking for IGCEs and price analysis. Runs locally from the gsa-calc-mcp Python package.
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MCP server for GSA Per Diem Rates API. Federal travel lodging and M&IE rates for IGCEs and travel cost estimation. Runs locally from the gsa-perdiem-mcp Python package. Needs 1 environment variable to run.
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MCP server for the Regulations.gov API. Federal rulemaking dockets, documents, comments, and comment period tracking. Runs locally from the regulationsgov-mcp Python package. Needs 1 environment variable to run.
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MCP server for SAM.gov entity registration, exclusion, contract opportunity, and contract award data. Runs locally from the sam-gov-mcp Python package. Needs 1 environment variable to run.
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MCP server for USASpending.gov federal contract and award data. Runs locally from the usaspending-gov-mcp Python package.
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At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: