I built a free tool that checks SAM.gov exclusions, government contract history, and domain legitimacy in one call
Background: I'm a developer who kept running into the same friction
when vetting subcontractors — manually checking SAM.gov exclusions,
then pulling USASpending.gov history, then verifying the company's
domain wasn't registered last week. Three tabs, 20+ minutes, every time.
So I built DataNexus — a free MCP server that chains these checks
automatically when you're working inside Claude Code or Claude Desktop.
Here's a real vendor check I ran today on Palantir Technologies:
- SAM.gov exclusion → Not excluded, active and eligible
- Federal contracts → $1.32B across 20 awards, 5 agencies
- Most recent award → $94.6M from USDA, April 2026
- Domain check → palantir.com registered 1998,
- MarkMonitor, transfer-locked, expires 2027
- Verdict → CLEAR
- The whole check took about 8 seconds. Sources: SAM.gov,
USASpending.gov, IANA RDAP — all live government data,
nothing cached or mocked.
If you're using Claude Code, you can add it with:
smithery mcp add https://server.smithery.ai/dev-7bd0/mcp-server
Or find it on Smithery:
https://smithery.ai/server/dev-7bd0/mcp-server
It also covers FINRA broker checks, NPI healthcare registry
lookups, open solicitations, and regulatory monitoring —
55 tools total across compliance, legal, domain, and govcon data.
Full demo with live results here:
https://datanexusmcp.com/use-case-cards.html
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Disclosure: I built DataNexus. It's free — posting because I
couldn't find a single free tool that did SAM exclusion + contract
history + domain verification in one place without a subscription.
Happy to answer questions about how it works or what data sources
it pulls from.