ParticlePhysics MCP Server

提供對粒子數據組（PDG）粒子物理數據的無縫存取，供AI助手與應用程式使用。

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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
Changelog
Maintainer
License

Features

search_particle — mass (MeV + GeV), charge, spin, color, parity / C / I / G, lifetime or width, MCID, review ID
list_decays — exclusive / inclusive branching fractions with the source method named
Natural-language input — muon plus, positive tau, pion zero, kaon minus
Anti-particle support — antimuon, anti up quark, ubar, u bar, u_bar, u~, antineutron; resolved via MCID negation, no name guessing
MC ID lookup — query directly with 11, -2212, etc.
Self-conjugate aware — anti photon resolves to gamma, anti pi0 to pi0
Structured output — every response includes a fenced ```json block alongside the human-readable text

Install

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

Configure your MCP client

Add one of the following to your client's MCP config (e.g. claude_desktop_config.json).

Using uvx from the cloned repo (no global install needed):

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

Using a local virtualenv (after pip install -e .):

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

Tools

`search_particle`

Input	Example
Canonical name	`mu+`, `pi0`, `K-`, `Sigma+`, `gamma`, `Lambda`, `H`
English alias	`muon`, `pion`, `higgs`, `electron`, `top quark`
Anti-particle	`antimuon`, `anti up quark`, `ubar`, `u bar`, `u_bar`, `u~`, `antiproton`
Natural-language charge	`muon plus`, `positive tau`, `pion zero`, `kaon minus`
MC ID	`11` (electron), `-13` (mu+), `2212` (proton)

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

```json
{
  "query": "muon plus",
  "count": 1,
  "particles": [{
    "name": "mu+",
    "mcid": -13,
    "pdg_review_id": "S004/2025",
    "mass": {"mev": 105.6583755, "gev": 0.1056583755},
    "charge": {"value": 1.0, "fraction": "1"},
    "spin": "1/2",
    "color": {"multiplicity": 1, "label": "singlet"},
    "quantum_numbers": {"J": "1/2"},
    "lifetime": {"seconds": 2.197e-06, "stable": false, "text": "..."}
  }]
}
```

`list_decays`

Same identifier formats as search_particle. Tries exclusive_branching_fractions → branching_fractions → inclusive_branching_fractions and reports which source it used. Returns an empty decay list with stable=true for 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 %)
…

```json
{
  "particle": {"name": "tau-", "mcid": 15, ...},
  "source": "exclusive_branching_fractions",
  "count": 137,
  "decays": [{
    "description": "tau- --> mu- nubar_mu nu_tau",
    "branching_ratio_text": "17.39 ± 0.04",
    "value_text": "17.39E-2",
    "is_limit": false
  }, ...]
}
```

Changelog

See CHANGELOG.md for release notes.

Maintainer

@uzerone

License

MIT — see LICENSE.txt.

ParticlePhysics MCP Server

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