ParticlePhysics MCP Server

A Model Context Protocol server that lets Claude Desktop, IDEs, and other MCP clients look up particle properties and decay modes.

Supports natural-language queries (muon plus,pion zero,antiproton,anti up quark), case-insensitive lookup, MC IDs (-13), and returns both human-readable text and a structured JSON payload.

- Features
- Install
- Configure your MCP client
- Tools

- search_particle
- list_decays

git clone https://github.com/uzerone/particlephysics-mcp-server.git cd particlephysics-mcp-server pip install -e .

{ "mcpServers": { "particlephysics": { "command": "uvx", "args": ["--from", "/absolute/path/to/particlephysics-mcp-server", "python", "-m", "particlephysics_mcp_server"] } } }

Using a local virtualenv(afterpip install -e .):

{ "mcpServers": { "particlephysics": { "command": "/absolute/path/to/.venv/bin/python", "args": ["-m", "particlephysics_mcp_server"] } } }

Sample call:search_particle({"query": "muon plus"})

Found 1 particle(s) matching 'muon plus': 1. mu Name: mu+ PDG ID: -13 PDG Review ID: S004/2025 Mass: 105.6583755 MeV (0.1056583755 GeV) Spin (J): 1/2 Charge: 1 Color: singlet Quantum numbers: J=1/2 Lifetime: 2.196981148893498e-06 

Same identifier formats assearch_particle. Triesexclusive_branching_fractions→branching_fractions→inclusive_branching_fractionsand reports which source it used. Returns an empty decay list withstable=truefor stable particles.

Sample call:list_decays({"particle_id": "tau"})

Decay modes for particle 'tau': 1. tau- --> mu- nubar_mu nu_tau (BR: 17.39 ± 0.04 %) 2. tau- --> e- nubar_e nu_tau (BR: 17.82 ± 0.04 %) … 

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