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• License: MIT License (MIT)
• Author: James Jenrette / 1102tools
• Tags 1102 , calc , ceiling-rates , federal-contracts , gsa , igce , mcp , model-context-protocol , pricing
• Requires: Python >=3.10

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• Development Status
  • 3 - Alpha
• Intended Audience
  • Developers
• License
  • OSI Approved :: MIT License
• Programming Language
  • Python :: 3

gsa-calc-mcp

MCP server for the GSA CALC+ Labor Ceiling Rates API. Query awarded GSA MAS schedule hourly rates for IGCE development, price reasonableness analysis, and market research.

No authentication required. Works with any MCP-compatible client.

Tested and hardened through four retroactive live audit rounds against the GSA CALC+ API. 314 regression tests covering 49 P1 bugs (19 crashes, 30 silent-wrong-data) and 19 P2 validation gaps fixed, plus 12 retroactive deep-audit findings. See TESTING.md for the full testing record.

What it does

Exposes the GSA CALC+ API as 8 MCP tools:

Core search

• keyword_search - Wildcard search across labor categories, vendors, and contract numbers
• exact_search - Exact field match (use suggest_contains to discover values first)
• suggest_contains - Autocomplete/discovery for field values (2-char minimum)
• filtered_browse - Browse with filters only (no keyword)

Workflow tools

• igce_benchmark - Rate statistics for IGCE development (min/max/avg/median/percentiles)
• price_reasonableness_check - Evaluate a proposed rate against market distribution
• vendor_rate_card - All rates for a vendor (auto-discovers exact name)
• sin_analysis - Rate distribution for a GSA SIN

No authentication required

The GSA CALC+ API is public. 1,000 requests/hour rate limit.

Installation

uvxgsa-calc-mcp

Or from source:

gitclonehttps://github.com/1102tools/federal-contracting-mcps.git
cdfederal-contracting-mcps/servers/gsa-calc-mcp
pipinstall-e.

Claude Desktop configuration

{
"mcpServers":{
"gsa-calc":{
"command":"uvx",
"args":["gsa-calc-mcp"]
}
}
}

Example prompts

• "What are the GSA ceiling rates for Senior Software Developer with a BA and 10+ years experience?"
• "Is $195/hr reasonable for a Cybersecurity Analyst? Check against CALC+ rates."
• "Pull the full rate card for Booz Allen Hamilton from GSA CALC+."
• "What does the IT Professional Services SIN (54151S) rate distribution look like?"
• "Build IGCE benchmarks for these 5 labor categories: Program Manager, Systems Engineer, Software Developer, Help Desk Specialist, Network Administrator."
• "Find all small business ceiling rates for project management between $100-$200/hr."

Important: ceiling rates, not prices paid

CALC+ data represents the maximum hourly rate a contractor can charge under their GSA MAS contract. Actual task order rates should be lower per FAR 8.405-2(d). These rates are:

• Fully burdened (includes fringe, overhead, G&A, profit)
• Worldwide (no geographic adjustment)
• Master contract-level (not task order-specific)
• From vendor Price Proposal Tables (self-reported by contractors)

Always note sample size and remind users these are ceiling rates when presenting analysis.

License

MIT

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