phm-mcp-server

Deterministic physics plausibility tools for MCP clients (Claude Desktop, Cursor, Cline, and any Model Context Protocol host).

Three offline, deterministic checkers — zero network calls, zero model calls, pure standard-library rules from the phm-lite-check offline subset of the PHM engine:

These checks are necessary, not sufficient: a PASS verdict does not imply correctness. Not affiliated with or endorsed by Anthropic, OpenAI, or the MCP project; adapters are community-provided.

Registry listings

• Listed in the official MCP Registry as io.github.PHM-Audit/phm-lite-check@1.0.1 (registry.modelcontextprotocol.io, listing verified 2026-11-06). Registry listing is metadata publication and namespace verification — it is not an endorsement or certification.

• Also listed in the mcprush community MCP directory (independent security grade A, 3 tools, 14 client compatibilities). Directory listing is not an endorsement.

Related MCP server: ucon-mcp

Claude Desktop setup

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "phm-physics-check": {
      "command": "python",
      "args": ["/path/to/server.py"],
      "env": {}
    }
  }
}

Prerequisites:

pip install mcp
pip install git+https://github.com/PHM-Audit/phm-lite-check

Example tool call

{"tool": "physics_text_check", "args": {"text": "confidence 1.8 of success."}}
→ {"verdict": "FAIL", "violations": [{"rule": "probability_out_of_range",
   "detail": "Probability 1.8 outside [0, 1]"}], "engine": "PHM-Lite"}

Scope

Offline deterministic subset only (proprietary deep checks excluded). Python >= 3.10, deps: mcp + phm-lite-check (both pip-installable).