HYRR

io.github.exoma-chPublished by GitHub account exoma-chv0.22.0Updated Oct 27, 2026

Radio-isotope production, activity and dose for charged-particle beams on stacked targets

VerifiedSTDIODesktop onlyData & AnalyticsAI & ML

Overview

AI-generated overview

HYRR computes radio-isotope production, activity and dose for charged-particle beams on stacked targets, exposed to assistants as local simulation tools.

What you can do
  • Run simulations of isotope production for charged-particle beams on stacked targets
  • List available target materials and reaction channels
  • Retrieve decay data and isotope production curves
  • Compare simulations and compute stack energy budgets
  • Calculate stopping power for beam and target setups
When to use it
Useful for nuclear physics, accelerator targetry or medical isotope work where an assistant should run production, activity, dose or stopping-power calculations instead of estimating them by hand.
Requirements
Runs locally over stdio, typically launched with uvx from the hyrr-mcp PyPI package; the first run downloads the wheel or builds from source. Nuclear data comes from a nucl-parquet directory set via HYRR_DATA, otherwise fetched once into ~/.hyrr/nucl-parquet. HYRR_LIBRARY selects the data library (default tendl-2023-iso, or endfb-8.1). No authentication declared.
Before you install
The first run downloads a package and, if HYRR_DATA is unset, fetches a nuclear data release into the home directory, so network access and disk space are needed. Results depend on the selected data library and data directory, so library choice should be recorded with any conclusions.

Installation

In SourceWeft

  1. Open HYRR in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

hyrr-mcp

HYRR MCP server — stdio JSON-RPC for radio-isotope production queries.

Listed in the official MCP Registry as io.github.exoma-ch/hyrr.

Install and register with Claude Code:

bash
claude mcp add hyrr -- uvx hyrr-mcp

The first invocation downloads the wheel (or builds from source if no wheel exists for your platform); subsequent runs are instant.

Data resolution priority: --data-dir arg → HYRR_DATA env → sibling nucl-parquet/ → ~/.hyrr/nucl-parquet.

The tools surface (simulate, list_materials, list_reaction_channels, get_decay_data, compare_simulations, get_stack_energy_budget, get_stopping_power, get_isotope_production_curve) is implemented in Rust in hyrr-core::mcp; this package is a thin PyO3 wrapper used purely for distribution.

Source: py-mcp/README.md at commit ad70777

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.22.0LatestSep 29, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts